/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/gemcutter/Termination.epf -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -i /storage/cav23-termute-examples/4_plus_thr/pc4.c.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:58:53,136 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:58:53,174 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/gemcutter/Termination.epf [2025-04-26 16:58:53,182 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:58:53,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:58:53,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Check unreachability of error function in SV-COMP mode [2025-04-26 16:58:53,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2025-04-26 16:58:53,203 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:58:53,203 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:58:53,204 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:58:53,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:58:53,204 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:58:53,204 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:58:53,204 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:58:53,204 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:58:53,204 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:58:53,204 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:58:53,204 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:58:53,204 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:58:53,204 INFO L153 SettingsManager]: * Automaton type for concurrent programs=PARTIAL_ORDER_BA [2025-04-26 16:58:53,204 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:58:53,205 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:58:53,206 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:58:53,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 [2025-04-26 16:58:53,207 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:58:53,207 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:58:53,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-26 16:58:53,207 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-26 16:58:53,207 INFO L153 SettingsManager]: * Use conditional POR in concurrent analysis=false [2025-04-26 16:58:53,207 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:58:53,207 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:58:53,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:58:53,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:58:53,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:58:53,448 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:58:53,450 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:58:53,454 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/cav23-termute-examples/4_plus_thr/pc4.c.bpl [2025-04-26 16:58:53,454 INFO L110 BoogieParser]: Parsing: '/storage/cav23-termute-examples/4_plus_thr/pc4.c.bpl' [2025-04-26 16:58:53,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:58:53,471 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:58:53,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:58:53,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:58:53,472 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:58:53,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,510 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:58:53,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:58:53,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:58:53,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:58:53,512 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:58:53,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,520 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,521 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,526 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,527 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,537 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:58:53,538 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:58:53,538 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:58:53,538 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:58:53,541 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/1) ... [2025-04-26 16:58:53,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 [2025-04-26 16:58:53,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:53,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-26 16:58:53,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-26 16:58:53,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-04-26 16:58:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:58:53,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:58:53,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-04-26 16:58:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:58:53,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:58:53,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2025-04-26 16:58:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-26 16:58:53,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-26 16:58:53,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-04-26 16:58:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:58:53,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:58:53,594 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2025-04-26 16:58:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-04-26 16:58:53,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-04-26 16:58:53,594 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-26 16:58:53,632 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:58:53,634 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:58:53,737 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:58:53,737 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:58:53,746 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:58:53,747 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-26 16:58:53,747 INFO L201 PluginConnector]: Adding new model pc4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:58:53 BoogieIcfgContainer [2025-04-26 16:58:53,747 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:58:53,748 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:58:53,748 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:58:53,754 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:58:53,755 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:58:53,755 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:58:53" (1/2) ... [2025-04-26 16:58:53,757 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3cbf6d92 and model type pc4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:58:53, skipping insertion in model container [2025-04-26 16:58:53,757 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:58:53,757 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:58:53" (2/2) ... [2025-04-26 16:58:53,758 INFO L376 chiAutomizerObserver]: Analyzing ICFG pc4.c.bpl [2025-04-26 16:58:53,814 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-04-26 16:58:53,861 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-26 16:58:53,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-04-26 16:58:53,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:53,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2025-04-26 16:58:53,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2025-04-26 16:58:53,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 42 transitions, 112 flow [2025-04-26 16:58:53,952 INFO L116 PetriNetUnfolderBase]: 4/34 cut-off events. [2025-04-26 16:58:53,955 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-26 16:58:53,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 34 events. 4/34 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 90 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2025-04-26 16:58:53,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 42 transitions, 112 flow [2025-04-26 16:58:53,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 34 transitions, 92 flow [2025-04-26 16:58:53,964 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 43 places, 34 transitions, 92 flow [2025-04-26 16:58:53,969 INFO L135 AmpleReduction]: Starting ample reduction [2025-04-26 16:58:54,480 WARN L140 AmpleReduction]: Number of pruned transitions: 3656 [2025-04-26 16:58:54,480 WARN L141 AmpleReduction]: Loop nodes with "changing loop node status": 0 [2025-04-26 16:58:54,481 WARN L142 AmpleReduction]: Number of trivial sets caused by loops: 431 [2025-04-26 16:58:54,481 WARN L143 AmpleReduction]: Number of not loop caused trivial ample sets:28 [2025-04-26 16:58:54,481 WARN L144 AmpleReduction]: Number of initially assigned non-trivial ample sets:1324 [2025-04-26 16:58:54,481 WARN L145 AmpleReduction]: Times succ was already a loop node:170 [2025-04-26 16:58:54,481 WARN L146 AmpleReduction]: Times some other node on the cycle already had a trivial ample set:831 [2025-04-26 16:58:54,481 INFO L149 AmpleReduction]: Finished ample reduction [2025-04-26 16:58:54,489 INFO L136 dAbstractionProvider]: Constructed initial ample set-reduced NBA abstraction that has 1784 states, 1783 states have (on average 1.9153112731351654) internal successors, (in total 3415), 1783 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:54,497 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:58:54,497 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:58:54,497 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:58:54,498 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:58:54,498 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:58:54,498 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:58:54,498 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:58:54,498 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:58:54,502 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 1784 states, 1783 states have (on average 1.9153112731351654) internal successors, (in total 3415), 1783 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:54,559 INFO L131 ngComponentsAnalysis]: Automaton has 183 accepting balls. 1305 [2025-04-26 16:58:54,559 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:58:54,559 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:58:54,564 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:58:54,564 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:58:54,564 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:58:54,568 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 1784 states, 1783 states have (on average 1.9153112731351654) internal successors, (in total 3415), 1783 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:54,593 INFO L131 ngComponentsAnalysis]: Automaton has 183 accepting balls. 1305 [2025-04-26 16:58:54,594 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:58:54,594 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:58:54,594 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:58:54,594 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:58:54,599 INFO L752 eck$LassoCheckResult]: Stem: "[75] $Ultimate##0-->L14: Formula: (= v_f_6 0) InVars {f=v_f_6} OutVars{f=v_f_6} AuxVars[] AssignedVars[]" "[111] L14-->L27: Formula: (= v_thread1Thread1of1ForFork1_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork1_thidvar0=v_thread1Thread1of1ForFork1_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork1_thidvar0]" [2025-04-26 16:58:54,599 INFO L754 eck$LassoCheckResult]: Loop: "[83] L27-->L29: 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[]" "[85] L29-->L30: Formula: (= v_x1_2 (+ v_x1_3 1)) InVars {x1=v_x1_3} OutVars{x1=v_x1_2} AuxVars[] AssignedVars[x1]" "[87] L30-->L27: Formula: (= (+ v_c_2 1) v_c_1) InVars {c=v_c_2} OutVars{c=v_c_1} AuxVars[] AssignedVars[c]" [2025-04-26 16:58:54,603 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash 3397, now seen corresponding path program 1 times [2025-04-26 16:58:54,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:54,608 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786039243] [2025-04-26 16:58:54,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:54,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:54,649 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:58:54,669 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:58:54,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:54,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:54,670 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:54,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:58:54,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:58:54,675 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:54,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:54,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:54,709 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash 112276, now seen corresponding path program 1 times [2025-04-26 16:58:54,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:54,710 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62461834] [2025-04-26 16:58:54,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:54,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:54,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:54,721 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:54,721 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:54,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:54,721 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:54,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:54,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:54,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:54,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:54,726 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:54,727 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash 101282512, now seen corresponding path program 1 times [2025-04-26 16:58:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:54,731 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895125781] [2025-04-26 16:58:54,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:54,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:54,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:58:54,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:58:54,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:54,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:54,737 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:54,738 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:58:54,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:58:54,739 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:54,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:54,742 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:54,808 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:58:54,809 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:58:54,809 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:58:54,809 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:58:54,809 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:58:54,809 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:54,809 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:58:54,809 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:58:54,809 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:58:54,809 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:58:54,809 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:58:54,819 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:54,826 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:54,870 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:58:54,870 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:58:54,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:54,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:54,873 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) [2025-04-26 16:58:54,876 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 [2025-04-26 16:58:54,877 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:58:54,877 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:54,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2025-04-26 16:58:54,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:54,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:54,900 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) [2025-04-26 16:58:54,902 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 [2025-04-26 16:58:54,903 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:58:54,903 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:54,942 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:58:54,943 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {c=0} Honda state: {c=0} Generalized eigenvectors: [{c=-3}, {c=-3}, {c=7}] Lambdas: [0, 1, 1] Nus: [1, 0] [2025-04-26 16:58:54,949 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 [2025-04-26 16:58:54,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:54,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:54,951 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) [2025-04-26 16:58:54,953 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 [2025-04-26 16:58:54,955 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:58:54,955 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:54,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2025-04-26 16:58:54,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:54,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:54,974 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) [2025-04-26 16:58:54,974 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 [2025-04-26 16:58:54,976 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:58:54,976 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:55,046 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:58:55,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2025-04-26 16:58:55,052 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:58:55,052 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:58:55,052 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:58:55,052 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:58:55,052 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:58:55,052 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,052 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:58:55,052 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:58:55,052 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:58:55,052 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:58:55,052 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:58:55,053 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:55,057 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:55,087 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:58:55,091 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:58:55,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:55,093 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) [2025-04-26 16:58:55,094 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 [2025-04-26 16:58:55,095 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 [2025-04-26 16:58:55,106 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:58:55,106 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:58:55,106 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:58:55,106 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:58:55,106 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:58:55,111 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:58:55,111 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:58:55,116 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:58:55,121 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 [2025-04-26 16:58:55,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:55,123 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) [2025-04-26 16:58:55,124 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 [2025-04-26 16:58:55,125 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 [2025-04-26 16:58:55,135 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:58:55,135 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:58:55,135 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:58:55,135 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:58:55,135 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:58:55,136 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:58:55,136 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:58:55,138 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:58:55,141 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:58:55,141 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:58:55,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:55,145 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) [2025-04-26 16:58:55,146 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 [2025-04-26 16:58:55,146 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:58:55,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2025-04-26 16:58:55,149 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:58:55,149 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:58:55,150 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z1, x1) = 1*z1 - 1*x1 Supporting invariants [] [2025-04-26 16:58:55,155 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 [2025-04-26 16:58:55,157 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:58:55,179 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:55,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:58:55,191 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:58:55,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:58:55,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:58:55,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:58:55,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:55,205 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:55,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:58:55,206 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:58:55,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:58:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-26 16:58:55,269 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:58:55,273 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 1784 states, 1783 states have (on average 1.9153112731351654) internal successors, (in total 3415), 1783 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (in total 5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:55,448 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 1784 states, 1783 states have (on average 1.9153112731351654) internal successors, (in total 3415), 1783 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (in total 5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 3654 states and 7090 transitions. Complement of second has 6 states. [2025-04-26 16:58:55,450 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:58:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (in total 5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2025-04-26 16:58:55,460 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 78 transitions. Stem has 2 letters. Loop has 3 letters. [2025-04-26 16:58:55,461 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:55,461 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 78 transitions. Stem has 5 letters. Loop has 3 letters. [2025-04-26 16:58:55,461 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:55,461 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 78 transitions. Stem has 2 letters. Loop has 6 letters. [2025-04-26 16:58:55,461 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:55,461 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 3654 states and 7090 transitions. [2025-04-26 16:58:55,498 INFO L131 ngComponentsAnalysis]: Automaton has 98 accepting balls. 528 [2025-04-26 16:58:55,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 3654 states to 2269 states and 4302 transitions. [2025-04-26 16:58:55,528 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1116 [2025-04-26 16:58:55,534 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1446 [2025-04-26 16:58:55,535 INFO L74 IsDeterministic]: Start isDeterministic. Operand 2269 states and 4302 transitions. [2025-04-26 16:58:55,535 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:58:55,537 INFO L218 hiAutomatonCegarLoop]: Abstraction has 2269 states and 4302 transitions. [2025-04-26 16:58:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states and 4302 transitions. [2025-04-26 16:58:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2104. [2025-04-26 16:58:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2104 states have (on average 1.966254752851711) internal successors, (in total 4137), 2103 states have internal predecessors, (4137), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 4137 transitions. [2025-04-26 16:58:55,642 INFO L240 hiAutomatonCegarLoop]: Abstraction has 2104 states and 4137 transitions. [2025-04-26 16:58:55,642 INFO L438 stractBuchiCegarLoop]: Abstraction has 2104 states and 4137 transitions. [2025-04-26 16:58:55,642 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:58:55,642 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2104 states and 4137 transitions. [2025-04-26 16:58:55,651 INFO L131 ngComponentsAnalysis]: Automaton has 98 accepting balls. 528 [2025-04-26 16:58:55,652 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:58:55,652 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:58:55,652 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2025-04-26 16:58:55,652 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:58:55,653 INFO L752 eck$LassoCheckResult]: Stem: "[75] $Ultimate##0-->L14: Formula: (= v_f_6 0) InVars {f=v_f_6} OutVars{f=v_f_6} AuxVars[] AssignedVars[]" "[111] L14-->L27: Formula: (= v_thread1Thread1of1ForFork1_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork1_thidvar0=v_thread1Thread1of1ForFork1_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork1_thidvar0]" "[82] L27-->L32: Formula: (<= v_z1_2 v_x1_4) InVars {x1=v_x1_4, z1=v_z1_2} OutVars{x1=v_x1_4, z1=v_z1_2} AuxVars[] AssignedVars[]" "[84] L32-->thread1FINAL: Formula: (= (+ v_f_2 1) v_f_1) InVars {f=v_f_2} OutVars{f=v_f_1} AuxVars[] AssignedVars[f]" "[86] thread1FINAL-->thread1EXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[114] L14-1-->L38: Formula: (and (= 2 v_thread2Thread1of1ForFork2_thidvar1_2) (= 2 v_thread2Thread1of1ForFork2_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork2_thidvar1=v_thread2Thread1of1ForFork2_thidvar1_2, thread2Thread1of1ForFork2_thidvar0=v_thread2Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_thidvar1, thread2Thread1of1ForFork2_thidvar0]" [2025-04-26 16:58:55,653 INFO L754 eck$LassoCheckResult]: Loop: "[89] L38-->L40: 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[]" "[91] L40-->L41: Formula: (= v_x2_2 (+ v_x2_3 1)) InVars {x2=v_x2_3} OutVars{x2=v_x2_2} AuxVars[] AssignedVars[x2]" "[93] L41-->L38: Formula: (= (+ v_c_4 1) v_c_3) InVars {c=v_c_4} OutVars{c=v_c_3} AuxVars[] AssignedVars[c]" [2025-04-26 16:58:55,654 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:55,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1155240093, now seen corresponding path program 1 times [2025-04-26 16:58:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:55,654 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694802006] [2025-04-26 16:58:55,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:55,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:55,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:58:55,661 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:58:55,661 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:55,661 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:55,662 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:58:55,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:58:55,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:55,667 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:55,667 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash 118234, now seen corresponding path program 1 times [2025-04-26 16:58:55,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:55,668 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098109457] [2025-04-26 16:58:55,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:55,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:55,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:55,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:55,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:55,673 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:55,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:55,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:55,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:55,678 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:55,678 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash -184579272, now seen corresponding path program 1 times [2025-04-26 16:58:55,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:55,678 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799437241] [2025-04-26 16:58:55,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:55,685 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-26 16:58:55,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-26 16:58:55,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:55,687 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:55,692 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-26 16:58:55,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-26 16:58:55,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:55,698 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:55,719 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:58:55,719 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:58:55,719 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:58:55,719 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:58:55,719 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:58:55,720 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,720 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:58:55,720 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:58:55,720 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:58:55,720 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:58:55,720 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:58:55,720 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:55,726 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:55,749 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:58:55,749 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:58:55,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:55,752 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) [2025-04-26 16:58:55,754 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 [2025-04-26 16:58:55,755 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:58:55,755 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:55,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2025-04-26 16:58:55,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:55,775 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) [2025-04-26 16:58:55,780 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 [2025-04-26 16:58:55,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:58:55,781 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:55,845 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:58:55,850 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 [2025-04-26 16:58:55,850 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:58:55,850 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:58:55,850 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:58:55,850 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:58:55,850 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:58:55,850 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,850 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:58:55,850 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:58:55,850 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:58:55,850 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:58:55,850 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:58:55,851 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:55,858 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:55,883 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:58:55,883 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:58:55,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:55,885 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) [2025-04-26 16:58:55,888 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 [2025-04-26 16:58:55,889 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 [2025-04-26 16:58:55,900 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:58:55,900 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:58:55,900 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:58:55,900 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:58:55,900 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:58:55,901 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:58:55,901 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:58:55,904 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:58:55,907 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:58:55,907 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:58:55,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:55,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:55,909 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) [2025-04-26 16:58:55,910 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 [2025-04-26 16:58:55,912 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:58:55,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2025-04-26 16:58:55,915 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:58:55,915 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:58:55,915 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z2, x2) = 1*z2 - 1*x2 Supporting invariants [] [2025-04-26 16:58:55,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2025-04-26 16:58:55,924 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:58:55,936 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:55,942 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:58:55,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:58:55,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:58:55,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:58:55,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:58:55,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:55,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:55,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:55,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:58:55,982 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:58:55,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:58:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-26 16:58:56,017 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:58:56,017 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 2104 states and 4137 transitions. cyclomatic complexity: 2204 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (in total 9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:56,122 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 2104 states and 4137 transitions. cyclomatic complexity: 2204. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (in total 9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 4674 states and 9121 transitions. Complement of second has 6 states. [2025-04-26 16:58:56,123 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:58:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (in total 9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2025-04-26 16:58:56,124 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 82 transitions. Stem has 6 letters. Loop has 3 letters. [2025-04-26 16:58:56,124 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:56,124 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 82 transitions. Stem has 9 letters. Loop has 3 letters. [2025-04-26 16:58:56,125 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:56,125 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 82 transitions. Stem has 6 letters. Loop has 6 letters. [2025-04-26 16:58:56,125 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:56,125 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 4674 states and 9121 transitions. [2025-04-26 16:58:56,165 INFO L131 ngComponentsAnalysis]: Automaton has 40 accepting balls. 162 [2025-04-26 16:58:56,185 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 4674 states to 3021 states and 5857 transitions. [2025-04-26 16:58:56,186 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1141 [2025-04-26 16:58:56,190 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1328 [2025-04-26 16:58:56,190 INFO L74 IsDeterministic]: Start isDeterministic. Operand 3021 states and 5857 transitions. [2025-04-26 16:58:56,190 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:58:56,190 INFO L218 hiAutomatonCegarLoop]: Abstraction has 3021 states and 5857 transitions. [2025-04-26 16:58:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states and 5857 transitions. [2025-04-26 16:58:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 2845. [2025-04-26 16:58:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2845 states have (on average 1.9585237258347978) internal successors, (in total 5572), 2844 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5572 transitions. [2025-04-26 16:58:56,264 INFO L240 hiAutomatonCegarLoop]: Abstraction has 2845 states and 5572 transitions. [2025-04-26 16:58:56,264 INFO L438 stractBuchiCegarLoop]: Abstraction has 2845 states and 5572 transitions. [2025-04-26 16:58:56,264 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:58:56,264 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2845 states and 5572 transitions. [2025-04-26 16:58:56,275 INFO L131 ngComponentsAnalysis]: Automaton has 40 accepting balls. 162 [2025-04-26 16:58:56,275 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:58:56,275 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:58:56,275 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:58:56,276 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:58:56,276 INFO L752 eck$LassoCheckResult]: Stem: "[75] $Ultimate##0-->L14: Formula: (= v_f_6 0) InVars {f=v_f_6} OutVars{f=v_f_6} AuxVars[] AssignedVars[]" "[111] L14-->L27: Formula: (= v_thread1Thread1of1ForFork1_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork1_thidvar0=v_thread1Thread1of1ForFork1_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork1_thidvar0]" "[82] L27-->L32: Formula: (<= v_z1_2 v_x1_4) InVars {x1=v_x1_4, z1=v_z1_2} OutVars{x1=v_x1_4, z1=v_z1_2} AuxVars[] AssignedVars[]" "[84] L32-->thread1FINAL: Formula: (= (+ v_f_2 1) v_f_1) InVars {f=v_f_2} OutVars{f=v_f_1} AuxVars[] AssignedVars[f]" "[86] thread1FINAL-->thread1EXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[114] L14-1-->L38: Formula: (and (= 2 v_thread2Thread1of1ForFork2_thidvar1_2) (= 2 v_thread2Thread1of1ForFork2_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork2_thidvar1=v_thread2Thread1of1ForFork2_thidvar1_2, thread2Thread1of1ForFork2_thidvar0=v_thread2Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_thidvar1, thread2Thread1of1ForFork2_thidvar0]" "[88] L38-->L43: Formula: (<= v_z2_2 v_x2_4) InVars {z2=v_z2_2, x2=v_x2_4} OutVars{z2=v_z2_2, x2=v_x2_4} AuxVars[] AssignedVars[]" "[90] L43-->thread2FINAL: Formula: (= (+ v_f_4 1) v_f_3) InVars {f=v_f_4} OutVars{f=v_f_3} AuxVars[] AssignedVars[f]" "[92] thread2FINAL-->thread2EXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[117] L15-->$Ultimate##0: Formula: (and (= v_thread3Thread1of1ForFork3_thidvar2_2 3) (= v_thread3Thread1of1ForFork3_thidvar1_2 3) (= v_thread3Thread1of1ForFork3_thidvar0_2 3)) InVars {} OutVars{thread3Thread1of1ForFork3_thidvar0=v_thread3Thread1of1ForFork3_thidvar0_2, thread3Thread1of1ForFork3_thidvar2=v_thread3Thread1of1ForFork3_thidvar2_2, thread3Thread1of1ForFork3_thidvar1=v_thread3Thread1of1ForFork3_thidvar1_2} AuxVars[] AssignedVars[thread3Thread1of1ForFork3_thidvar0, thread3Thread1of1ForFork3_thidvar2, thread3Thread1of1ForFork3_thidvar1]" "[94] $Ultimate##0-->L50-1: Formula: (< 1 v_f_5) InVars {f=v_f_5} OutVars{f=v_f_5} AuxVars[] AssignedVars[]" [2025-04-26 16:58:56,276 INFO L754 eck$LassoCheckResult]: Loop: "[96] L50-1-->L52: Formula: (< v_y1_1 v_z1_3) InVars {y1=v_y1_1, z1=v_z1_3} OutVars{y1=v_y1_1, z1=v_z1_3} AuxVars[] AssignedVars[]" "[98] L52-->L53: Formula: (= v_y1_2 (+ v_y1_3 1)) InVars {y1=v_y1_3} OutVars{y1=v_y1_2} AuxVars[] AssignedVars[y1]" "[99] L53-->L50-1: Formula: (= (+ v_c_5 1) v_c_6) InVars {c=v_c_6} OutVars{c=v_c_5} AuxVars[] AssignedVars[c]" [2025-04-26 16:58:56,276 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:56,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1287971808, now seen corresponding path program 1 times [2025-04-26 16:58:56,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:56,276 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375595250] [2025-04-26 16:58:56,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:56,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:56,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-26 16:58:56,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-26 16:58:56,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,281 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:56,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-26 16:58:56,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-26 16:58:56,284 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:56,286 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash 125184, now seen corresponding path program 1 times [2025-04-26 16:58:56,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:56,286 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117702422] [2025-04-26 16:58:56,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:56,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:56,288 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:56,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:56,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,289 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:56,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:56,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:56,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:56,291 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1269785729, now seen corresponding path program 1 times [2025-04-26 16:58:56,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:56,291 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015329167] [2025-04-26 16:58:56,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:56,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:56,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-26 16:58:56,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-26 16:58:56,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,297 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:56,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-26 16:58:56,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-26 16:58:56,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,306 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:56,324 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:58:56,324 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:58:56,324 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:58:56,324 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:58:56,325 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:58:56,325 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:56,325 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:58:56,325 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:58:56,325 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:58:56,325 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:58:56,325 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:58:56,325 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:56,328 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:56,353 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:58:56,354 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:58:56,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:56,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:56,356 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) [2025-04-26 16:58:56,358 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 [2025-04-26 16:58:56,359 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:58:56,359 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:56,375 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 [2025-04-26 16:58:56,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:56,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:56,377 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) [2025-04-26 16:58:56,377 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 [2025-04-26 16:58:56,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:58:56,378 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:56,402 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:58:56,402 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {c=0} Honda state: {c=0} Generalized eigenvectors: [{c=0}, {c=7}, {c=-8}] Lambdas: [0, 1, 1] Nus: [0, 0] [2025-04-26 16:58:56,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2025-04-26 16:58:56,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:56,410 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) [2025-04-26 16:58:56,410 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 [2025-04-26 16:58:56,412 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:58:56,412 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:56,429 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 [2025-04-26 16:58:56,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:56,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:56,431 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) [2025-04-26 16:58:56,431 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 [2025-04-26 16:58:56,433 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:58:56,433 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:56,501 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:58:56,507 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 [2025-04-26 16:58:56,507 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:58:56,507 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:58:56,507 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:58:56,507 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:58:56,507 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:58:56,507 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:56,507 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:58:56,507 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:58:56,507 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:58:56,507 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:58:56,507 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:58:56,508 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:56,513 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:56,538 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:58:56,538 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:58:56,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:56,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:56,540 INFO L229 MonitoredProcess]: Starting monitored process 18 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) [2025-04-26 16:58:56,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2025-04-26 16:58:56,543 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 [2025-04-26 16:58:56,554 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:58:56,554 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:58:56,554 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:58:56,554 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:58:56,554 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:58:56,557 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:58:56,557 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:58:56,561 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:58:56,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2025-04-26 16:58:56,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:56,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:56,570 INFO L229 MonitoredProcess]: Starting monitored process 19 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) [2025-04-26 16:58:56,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2025-04-26 16:58:56,572 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 [2025-04-26 16:58:56,582 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:58:56,582 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:58:56,582 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:58:56,582 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:58:56,582 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:58:56,583 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:58:56,583 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:58:56,586 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:58:56,589 INFO L436 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-04-26 16:58:56,589 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:58:56,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:56,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:56,591 INFO L229 MonitoredProcess]: Starting monitored process 20 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) [2025-04-26 16:58:56,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2025-04-26 16:58:56,596 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:58:56,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2025-04-26 16:58:56,600 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:58:56,600 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:58:56,600 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(y1, z1) = -1*y1 + 1*z1 Supporting invariants [] [2025-04-26 16:58:56,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2025-04-26 16:58:56,606 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:58:56,620 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:56,625 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-26 16:58:56,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-26 16:58:56,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:58:56,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:58:56,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:58:56,653 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:56,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:56,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:58:56,654 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:58:56,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:58:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-26 16:58:56,684 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:58:56,684 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 2845 states and 5572 transitions. cyclomatic complexity: 2916 Second operand has 4 states, 4 states have (on average 3.5) internal successors, (in total 14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:56,803 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 2845 states and 5572 transitions. cyclomatic complexity: 2916. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (in total 14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 6197 states and 12055 transitions. Complement of second has 6 states. [2025-04-26 16:58:56,804 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:58:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.5) internal successors, (in total 14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-04-26 16:58:56,805 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 95 transitions. Stem has 11 letters. Loop has 3 letters. [2025-04-26 16:58:56,805 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:56,805 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 95 transitions. Stem has 14 letters. Loop has 3 letters. [2025-04-26 16:58:56,805 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:56,805 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 95 transitions. Stem has 11 letters. Loop has 6 letters. [2025-04-26 16:58:56,805 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:56,805 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6197 states and 12055 transitions. [2025-04-26 16:58:56,844 INFO L131 ngComponentsAnalysis]: Automaton has 15 accepting balls. 45 [2025-04-26 16:58:56,866 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6197 states to 3600 states and 6942 transitions. [2025-04-26 16:58:56,866 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1047 [2025-04-26 16:58:56,868 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1156 [2025-04-26 16:58:56,868 INFO L74 IsDeterministic]: Start isDeterministic. Operand 3600 states and 6942 transitions. [2025-04-26 16:58:56,869 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:58:56,869 INFO L218 hiAutomatonCegarLoop]: Abstraction has 3600 states and 6942 transitions. [2025-04-26 16:58:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states and 6942 transitions. [2025-04-26 16:58:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3463. [2025-04-26 16:58:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3463 states have (on average 1.9537972855905283) internal successors, (in total 6766), 3462 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 6766 transitions. [2025-04-26 16:58:56,935 INFO L240 hiAutomatonCegarLoop]: Abstraction has 3463 states and 6766 transitions. [2025-04-26 16:58:56,935 INFO L438 stractBuchiCegarLoop]: Abstraction has 3463 states and 6766 transitions. [2025-04-26 16:58:56,935 INFO L340 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2025-04-26 16:58:56,935 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3463 states and 6766 transitions. [2025-04-26 16:58:56,948 INFO L131 ngComponentsAnalysis]: Automaton has 15 accepting balls. 45 [2025-04-26 16:58:56,948 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:58:56,948 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:58:56,948 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:58:56,948 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:58:56,949 INFO L752 eck$LassoCheckResult]: Stem: "[75] $Ultimate##0-->L14: Formula: (= v_f_6 0) InVars {f=v_f_6} OutVars{f=v_f_6} AuxVars[] AssignedVars[]" "[111] L14-->L27: Formula: (= v_thread1Thread1of1ForFork1_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork1_thidvar0=v_thread1Thread1of1ForFork1_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork1_thidvar0]" "[82] L27-->L32: Formula: (<= v_z1_2 v_x1_4) InVars {x1=v_x1_4, z1=v_z1_2} OutVars{x1=v_x1_4, z1=v_z1_2} AuxVars[] AssignedVars[]" "[84] L32-->thread1FINAL: Formula: (= (+ v_f_2 1) v_f_1) InVars {f=v_f_2} OutVars{f=v_f_1} AuxVars[] AssignedVars[f]" "[86] thread1FINAL-->thread1EXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[114] L14-1-->L38: Formula: (and (= 2 v_thread2Thread1of1ForFork2_thidvar1_2) (= 2 v_thread2Thread1of1ForFork2_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork2_thidvar1=v_thread2Thread1of1ForFork2_thidvar1_2, thread2Thread1of1ForFork2_thidvar0=v_thread2Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_thidvar1, thread2Thread1of1ForFork2_thidvar0]" "[88] L38-->L43: Formula: (<= v_z2_2 v_x2_4) InVars {z2=v_z2_2, x2=v_x2_4} OutVars{z2=v_z2_2, x2=v_x2_4} AuxVars[] AssignedVars[]" "[90] L43-->thread2FINAL: Formula: (= (+ v_f_4 1) v_f_3) InVars {f=v_f_4} OutVars{f=v_f_3} AuxVars[] AssignedVars[f]" "[92] thread2FINAL-->thread2EXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[117] L15-->$Ultimate##0: Formula: (and (= v_thread3Thread1of1ForFork3_thidvar2_2 3) (= v_thread3Thread1of1ForFork3_thidvar1_2 3) (= v_thread3Thread1of1ForFork3_thidvar0_2 3)) InVars {} OutVars{thread3Thread1of1ForFork3_thidvar0=v_thread3Thread1of1ForFork3_thidvar0_2, thread3Thread1of1ForFork3_thidvar2=v_thread3Thread1of1ForFork3_thidvar2_2, thread3Thread1of1ForFork3_thidvar1=v_thread3Thread1of1ForFork3_thidvar1_2} AuxVars[] AssignedVars[thread3Thread1of1ForFork3_thidvar0, thread3Thread1of1ForFork3_thidvar2, thread3Thread1of1ForFork3_thidvar1]" "[94] $Ultimate##0-->L50-1: Formula: (< 1 v_f_5) InVars {f=v_f_5} OutVars{f=v_f_5} AuxVars[] AssignedVars[]" "[95] L50-1-->thread3FINAL: Formula: (<= v_z1_4 v_y1_4) InVars {y1=v_y1_4, z1=v_z1_4} OutVars{y1=v_y1_4, z1=v_z1_4} AuxVars[] AssignedVars[]" "[97] thread3FINAL-->thread3EXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[108] L16-->$Ultimate##0: Formula: (and (= 4 v_thread4Thread1of1ForFork0_thidvar3_2) (= 4 v_thread4Thread1of1ForFork0_thidvar1_2) (= 4 v_thread4Thread1of1ForFork0_thidvar2_2) (= 4 v_thread4Thread1of1ForFork0_thidvar0_2)) InVars {} OutVars{thread4Thread1of1ForFork0_thidvar3=v_thread4Thread1of1ForFork0_thidvar3_2, thread4Thread1of1ForFork0_thidvar2=v_thread4Thread1of1ForFork0_thidvar2_2, thread4Thread1of1ForFork0_thidvar1=v_thread4Thread1of1ForFork0_thidvar1_2, thread4Thread1of1ForFork0_thidvar0=v_thread4Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread4Thread1of1ForFork0_thidvar3, thread4Thread1of1ForFork0_thidvar2, thread4Thread1of1ForFork0_thidvar1, thread4Thread1of1ForFork0_thidvar0]" "[100] $Ultimate##0-->L61-1: Formula: (< 1 v_f_7) InVars {f=v_f_7} OutVars{f=v_f_7} AuxVars[] AssignedVars[]" [2025-04-26 16:58:56,949 INFO L754 eck$LassoCheckResult]: Loop: "[102] L61-1-->L63: Formula: (< v_y2_1 v_z2_3) InVars {z2=v_z2_3, y2=v_y2_1} OutVars{z2=v_z2_3, y2=v_y2_1} AuxVars[] AssignedVars[]" "[104] L63-->L64: Formula: (= v_y2_2 (+ v_y2_3 1)) InVars {y2=v_y2_3} OutVars{y2=v_y2_2} AuxVars[] AssignedVars[y2]" "[105] L64-->L61-1: Formula: (= v_c_8 (+ v_c_7 1)) InVars {c=v_c_8} OutVars{c=v_c_7} AuxVars[] AssignedVars[c]" [2025-04-26 16:58:56,949 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 708621562, now seen corresponding path program 1 times [2025-04-26 16:58:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:56,949 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125423324] [2025-04-26 16:58:56,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:56,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:56,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-26 16:58:56,955 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-26 16:58:56,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,955 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:56,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-26 16:58:56,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-26 16:58:56,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:56,965 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:56,965 INFO L85 PathProgramCache]: Analyzing trace with hash 131142, now seen corresponding path program 1 times [2025-04-26 16:58:56,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:56,965 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424587235] [2025-04-26 16:58:56,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:56,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:56,970 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:56,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:56,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,971 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:56,972 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:56,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:56,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,973 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:56,975 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash 780795053, now seen corresponding path program 1 times [2025-04-26 16:58:56,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:58:56,975 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845724045] [2025-04-26 16:58:56,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:58:56,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:58:56,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-26 16:58:56,983 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-26 16:58:56,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,984 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:58:56,987 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-26 16:58:56,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-26 16:58:56,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:56,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:58:56,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:58:57,014 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:58:57,014 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:58:57,014 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:58:57,014 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:58:57,015 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:58:57,015 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:57,015 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:58:57,015 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:58:57,015 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:58:57,015 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:58:57,015 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:58:57,015 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:57,019 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:57,042 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:58:57,042 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:58:57,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:57,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:57,044 INFO L229 MonitoredProcess]: Starting monitored process 21 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) [2025-04-26 16:58:57,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2025-04-26 16:58:57,047 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:58:57,047 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:57,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2025-04-26 16:58:57,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:57,066 INFO L229 MonitoredProcess]: Starting monitored process 22 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) [2025-04-26 16:58:57,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2025-04-26 16:58:57,070 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:58:57,070 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:57,097 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:58:57,097 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {c=0} Honda state: {c=0} Generalized eigenvectors: [{c=0}, {c=7}, {c=-8}] Lambdas: [0, 1, 1] Nus: [0, 0] [2025-04-26 16:58:57,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2025-04-26 16:58:57,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:57,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:57,106 INFO L229 MonitoredProcess]: Starting monitored process 23 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) [2025-04-26 16:58:57,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2025-04-26 16:58:57,110 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:58:57,110 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:57,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2025-04-26 16:58:57,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:57,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:57,130 INFO L229 MonitoredProcess]: Starting monitored process 24 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) [2025-04-26 16:58:57,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2025-04-26 16:58:57,133 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:58:57,133 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:58:57,200 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:58:57,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2025-04-26 16:58:57,205 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:58:57,205 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:58:57,205 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:58:57,205 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:58:57,205 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:58:57,205 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:57,205 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:58:57,205 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:58:57,205 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:58:57,205 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:58:57,205 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:58:57,206 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:57,210 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:58:57,236 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:58:57,236 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:58:57,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:57,239 INFO L229 MonitoredProcess]: Starting monitored process 25 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) [2025-04-26 16:58:57,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2025-04-26 16:58:57,242 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 [2025-04-26 16:58:57,252 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:58:57,252 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:58:57,252 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:58:57,253 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:58:57,253 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:58:57,253 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:58:57,253 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:58:57,255 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:58:57,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2025-04-26 16:58:57,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:57,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:57,263 INFO L229 MonitoredProcess]: Starting monitored process 26 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) [2025-04-26 16:58:57,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2025-04-26 16:58:57,267 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 [2025-04-26 16:58:57,277 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:58:57,277 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:58:57,277 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:58:57,277 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:58:57,277 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:58:57,279 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:58:57,279 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:58:57,300 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:58:57,302 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:58:57,303 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:58:57,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:58:57,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:58:57,305 INFO L229 MonitoredProcess]: Starting monitored process 27 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) [2025-04-26 16:58:57,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2025-04-26 16:58:57,307 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:58:57,310 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:58:57,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2025-04-26 16:58:57,311 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:58:57,311 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:58:57,311 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(y2, z2) = -1*y2 + 1*z2 Supporting invariants [] [2025-04-26 16:58:57,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2025-04-26 16:58:57,318 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:58:57,329 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:58:57,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-26 16:58:57,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-26 16:58:57,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:57,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:58:57,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:58:57,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:58:57,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:58:57,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:58:57,364 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:58:57,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:58:57,364 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:58:57,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:58:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-26 16:58:57,393 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:58:57,394 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 3463 states and 6766 transitions. cyclomatic complexity: 3502 Second operand has 4 states, 4 states have (on average 4.5) internal successors, (in total 18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:57,464 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 3463 states and 6766 transitions. cyclomatic complexity: 3502. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (in total 18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 6920 states and 13339 transitions. Complement of second has 6 states. [2025-04-26 16:58:57,465 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:58:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 4.5) internal successors, (in total 18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:58:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2025-04-26 16:58:57,466 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 87 transitions. Stem has 15 letters. Loop has 3 letters. [2025-04-26 16:58:57,466 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:57,466 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 87 transitions. Stem has 18 letters. Loop has 3 letters. [2025-04-26 16:58:57,466 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:57,466 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 87 transitions. Stem has 15 letters. Loop has 6 letters. [2025-04-26 16:58:57,466 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:58:57,466 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6920 states and 13339 transitions. [2025-04-26 16:58:57,507 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:58:57,508 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6920 states to 0 states and 0 transitions. [2025-04-26 16:58:57,508 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:58:57,508 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:58:57,508 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:58:57,508 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:58:57,508 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:58:57,508 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:58:57,508 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:58:57,508 INFO L340 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2025-04-26 16:58:57,508 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:58:57,508 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:58:57,508 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:58:57,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2025-04-26 16:58:57,521 INFO L201 PluginConnector]: Adding new model pc4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:58:57 BoogieIcfgContainer [2025-04-26 16:58:57,521 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:58:57,521 INFO L158 Benchmark]: Toolchain (without parser) took 4050.38ms. Allocated memory was 159.4MB in the beginning and 184.5MB in the end (delta: 25.2MB). Free memory was 86.7MB in the beginning and 88.1MB in the end (delta: -1.3MB). Peak memory consumption was 24.6MB. Max. memory is 8.0GB. [2025-04-26 16:58:57,522 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.32ms. Allocated memory is still 159.4MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:58:57,522 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.39ms. Allocated memory is still 159.4MB. Free memory was 86.6MB in the beginning and 84.7MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:58:57,523 INFO L158 Benchmark]: Boogie Preprocessor took 25.49ms. Allocated memory is still 159.4MB. Free memory was 84.7MB in the beginning and 83.7MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-26 16:58:57,523 INFO L158 Benchmark]: RCFGBuilder took 209.16ms. Allocated memory is still 159.4MB. Free memory was 83.7MB in the beginning and 74.2MB in the end (delta: 9.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-26 16:58:57,523 INFO L158 Benchmark]: BuchiAutomizer took 3773.21ms. Allocated memory was 159.4MB in the beginning and 184.5MB in the end (delta: 25.2MB). Free memory was 74.1MB in the beginning and 88.1MB in the end (delta: -14.0MB). Peak memory consumption was 16.2MB. Max. memory is 8.0GB. [2025-04-26 16:58:57,524 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 0.32ms. Allocated memory is still 159.4MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.39ms. Allocated memory is still 159.4MB. Free memory was 86.6MB in the beginning and 84.7MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 25.49ms. Allocated memory is still 159.4MB. Free memory was 84.7MB in the beginning and 83.7MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 209.16ms. Allocated memory is still 159.4MB. Free memory was 83.7MB in the beginning and 74.2MB in the end (delta: 9.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * BuchiAutomizer took 3773.21ms. Allocated memory was 159.4MB in the beginning and 184.5MB in the end (delta: 25.2MB). Free memory was 74.1MB in the beginning and 88.1MB in the end (delta: -14.0MB). Peak memory consumption was 16.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.6s and 5 iterations. TraceHistogramMax:1. Analysis of lassos took 1.5s. Construction of modules took 0.1s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 3. Automata minimization 0.2s AutomataMinimizationTime, 3 MinimizatonAttempts, 478 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.2s 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, 249 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 245 mSDsluCounter, 396 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 211 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 147 IncrementalHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 185 mSDtfsCounter, 147 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf100 lsp70 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf94 smp100 dnf100 smp100 tf111 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 25ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 3 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.6s InitialAbstraction: Time to compute Ample Reduction [ms]: 625, Number of transitions in reduction automaton: 3415, Number of states in reduction automaton: 1784, Underlying: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (0 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 + z1 and consists of 4 locations. One deterministic module has affine ranking function -1 * y2 + z2 and consists of 4 locations. - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2025-04-26 16:58:57,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...