/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/2_thr/seq_loops_indep_2.c.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:56:46,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:56:46,240 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/gemcutter/Termination.epf [2025-04-26 16:56:46,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:56:46,247 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:56:46,247 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Check unreachability of error function in SV-COMP mode [2025-04-26 16:56:46,247 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2025-04-26 16:56:46,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:56:46,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:56:46,267 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:56:46,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:56:46,268 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Automaton type for concurrent programs=PARTIAL_ORDER_BA [2025-04-26 16:56:46,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:56:46,268 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:56:46,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 [2025-04-26 16:56:46,269 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-26 16:56:46,269 INFO L153 SettingsManager]: * Use conditional POR in concurrent analysis=false [2025-04-26 16:56:46,269 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:56:46,270 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:56:46,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:56:46,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:56:46,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:56:46,676 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:56:46,677 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:56:46,678 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/cav23-termute-examples/2_thr/seq_loops_indep_2.c.bpl [2025-04-26 16:56:46,678 INFO L110 BoogieParser]: Parsing: '/storage/cav23-termute-examples/2_thr/seq_loops_indep_2.c.bpl' [2025-04-26 16:56:46,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:56:46,691 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:56:46,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:56:46,693 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:56:46,693 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:56:46,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,716 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,720 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:56:46,721 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:56:46,723 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:56:46,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:56:46,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:56:46,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,728 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,731 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,731 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,735 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,736 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,744 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:56:46,745 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:56:46,745 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:56:46,745 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:56:46,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/1) ... [2025-04-26 16:56:46,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 [2025-04-26 16:56:46,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:46,771 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 16:56:46,774 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 16:56:46,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-04-26 16:56:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:56:46,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:56:46,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-04-26 16:56:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:56:46,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:56:46,795 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-04-26 16:56:46,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:56:46,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:56:46,795 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 16:56:46,831 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:56:46,832 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:56:46,905 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:56:46,905 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:56:46,913 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:56:46,914 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-26 16:56:46,914 INFO L201 PluginConnector]: Adding new model seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:56:46 BoogieIcfgContainer [2025-04-26 16:56:46,914 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:56:46,915 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:56:46,916 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:56:46,920 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:56:46,921 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:56:46,921 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:56:46" (1/2) ... [2025-04-26 16:56:46,922 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6a6bedf3 and model type seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:56:46, skipping insertion in model container [2025-04-26 16:56:46,922 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:56:46,922 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:56:46" (2/2) ... [2025-04-26 16:56:46,923 INFO L376 chiAutomizerObserver]: Analyzing ICFG seq_loops_indep_2.c.bpl [2025-04-26 16:56:46,971 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-26 16:56:47,003 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-26 16:56:47,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-04-26 16:56:47,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:47,005 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 16:56:47,007 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 16:56:47,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 23 transitions, 60 flow [2025-04-26 16:56:47,071 INFO L116 PetriNetUnfolderBase]: 4/19 cut-off events. [2025-04-26 16:56:47,072 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-26 16:56:47,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 4/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2025-04-26 16:56:47,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 23 transitions, 60 flow [2025-04-26 16:56:47,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2025-04-26 16:56:47,078 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 22 places, 19 transitions, 50 flow [2025-04-26 16:56:47,082 INFO L135 AmpleReduction]: Starting ample reduction [2025-04-26 16:56:47,122 WARN L140 AmpleReduction]: Number of pruned transitions: 23 [2025-04-26 16:56:47,122 WARN L141 AmpleReduction]: Loop nodes with "changing loop node status": 0 [2025-04-26 16:56:47,122 WARN L142 AmpleReduction]: Number of trivial sets caused by loops: 16 [2025-04-26 16:56:47,122 WARN L143 AmpleReduction]: Number of not loop caused trivial ample sets:15 [2025-04-26 16:56:47,122 WARN L144 AmpleReduction]: Number of initially assigned non-trivial ample sets:19 [2025-04-26 16:56:47,122 WARN L145 AmpleReduction]: Times succ was already a loop node:28 [2025-04-26 16:56:47,122 WARN L146 AmpleReduction]: Times some other node on the cycle already had a trivial ample set:2 [2025-04-26 16:56:47,122 INFO L149 AmpleReduction]: Finished ample reduction [2025-04-26 16:56:47,124 INFO L136 dAbstractionProvider]: Constructed initial ample set-reduced NBA abstraction that has 51 states, 50 states have (on average 1.8) internal successors, (in total 90), 50 states have internal predecessors, (90), 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 16:56:47,129 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:56:47,129 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:56:47,129 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:56:47,129 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:56:47,129 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:56:47,129 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:56:47,129 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:56:47,130 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:56:47,131 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 51 states, 50 states have (on average 1.8) internal successors, (in total 90), 50 states have internal predecessors, (90), 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 16:56:47,139 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 40 [2025-04-26 16:56:47,139 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:56:47,139 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:56:47,142 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1] [2025-04-26 16:56:47,142 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-04-26 16:56:47,142 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:56:47,142 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 51 states, 50 states have (on average 1.8) internal successors, (in total 90), 50 states have internal predecessors, (90), 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 16:56:47,144 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 40 [2025-04-26 16:56:47,144 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:56:47,144 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:56:47,144 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1] [2025-04-26 16:56:47,144 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-04-26 16:56:47,147 INFO L752 eck$LassoCheckResult]: Stem: "[68] $Ultimate##0-->L21: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" [2025-04-26 16:56:47,147 INFO L754 eck$LassoCheckResult]: Loop: "[53] L21-->L23: Formula: (< v_x1_1 v_z_1) InVars {x1=v_x1_1, z=v_z_1} OutVars{x1=v_x1_1, z=v_z_1} AuxVars[] AssignedVars[]" "[56] L23-->L21: Formula: (= v_x1_2 (+ v_x1_3 1)) InVars {x1=v_x1_3} OutVars{x1=v_x1_2} AuxVars[] AssignedVars[x1]" [2025-04-26 16:56:47,150 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash 99, now seen corresponding path program 1 times [2025-04-26 16:56:47,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:47,155 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926464915] [2025-04-26 16:56:47,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:47,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:56:47,199 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:56:47,199 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,199 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:47,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:56:47,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:56:47,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,210 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:47,214 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2660, now seen corresponding path program 1 times [2025-04-26 16:56:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:47,215 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918389955] [2025-04-26 16:56:47,215 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:47,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:47,218 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:47,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:47,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,224 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:47,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:47,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:47,229 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,231 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:47,231 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash 96838, now seen corresponding path program 1 times [2025-04-26 16:56:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:47,234 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121794034] [2025-04-26 16:56:47,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:47,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:47,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:56:47,239 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:56:47,239 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,239 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:47,240 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:56:47,243 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:56:47,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,244 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:47,296 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:56:47,296 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:56:47,296 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:56:47,297 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:56:47,297 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:56:47,297 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,297 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:56:47,297 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:56:47,297 INFO L132 ssoRankerPreferences]: Filename of dumped script: seq_loops_indep_2.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:56:47,297 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:56:47,297 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:56:47,308 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:56:47,379 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:56:47,380 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:56:47,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:47,384 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 16:56:47,386 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 16:56:47,388 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:56:47,388 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:56:47,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:47,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:47,414 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 16:56:47,415 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 16:56:47,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:56:47,418 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:56:47,490 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:56:47,495 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 16:56:47,495 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:56:47,495 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:56:47,495 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:56:47,495 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:56:47,495 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:56:47,495 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,495 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:56:47,495 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:56:47,495 INFO L132 ssoRankerPreferences]: Filename of dumped script: seq_loops_indep_2.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:56:47,495 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:56:47,495 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:56:47,496 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:56:47,522 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:56:47,525 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:56:47,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:47,529 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 16:56:47,530 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 16:56:47,531 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 16:56:47,542 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:56:47,542 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:56:47,543 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:56:47,543 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:56:47,543 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:56:47,547 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:56:47,547 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:56:47,550 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:56:47,558 INFO L436 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-04-26 16:56:47,558 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:56:47,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:47,561 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 16:56:47,562 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 16:56:47,563 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:56:47,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2025-04-26 16:56:47,566 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:56:47,566 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:56:47,566 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z, x1) = 1*z - 1*x1 Supporting invariants [] [2025-04-26 16:56:47,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:47,591 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:56:47,609 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:47,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:56:47,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:56:47,615 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:56:47,616 WARN L254 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:56:47,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:56:47,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:47,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:47,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:56:47,623 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:56:47,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:56:47,657 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 16:56:47,680 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2025-04-26 16:56:47,690 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 51 states, 50 states have (on average 1.8) internal successors, (in total 90), 50 states have internal predecessors, (90), 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 3 states, 3 states have (on average 1.0) internal successors, (in total 3), 2 states have internal predecessors, (3), 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 16:56:47,776 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 51 states, 50 states have (on average 1.8) internal successors, (in total 90), 50 states have internal predecessors, (90), 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 3 states, 3 states have (on average 1.0) internal successors, (in total 3), 2 states have internal predecessors, (3), 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 114 states and 209 transitions. Complement of second has 6 states. [2025-04-26 16:56:47,777 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 16:56:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) internal successors, (in total 3), 2 states have internal predecessors, (3), 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 16:56:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 29 transitions. [2025-04-26 16:56:47,784 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 29 transitions. Stem has 1 letters. Loop has 2 letters. [2025-04-26 16:56:47,785 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:47,785 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 29 transitions. Stem has 3 letters. Loop has 2 letters. [2025-04-26 16:56:47,785 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:47,785 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 29 transitions. Stem has 1 letters. Loop has 4 letters. [2025-04-26 16:56:47,785 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:47,786 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 114 states and 209 transitions. [2025-04-26 16:56:47,790 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 26 [2025-04-26 16:56:47,796 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 114 states to 57 states and 106 transitions. [2025-04-26 16:56:47,797 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2025-04-26 16:56:47,797 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2025-04-26 16:56:47,798 INFO L74 IsDeterministic]: Start isDeterministic. Operand 57 states and 106 transitions. [2025-04-26 16:56:47,798 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:56:47,798 INFO L218 hiAutomatonCegarLoop]: Abstraction has 57 states and 106 transitions. [2025-04-26 16:56:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 106 transitions. [2025-04-26 16:56:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2025-04-26 16:56:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 50 states have (on average 1.8) internal successors, (in total 90), 49 states have internal predecessors, (90), 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 16:56:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 90 transitions. [2025-04-26 16:56:47,819 INFO L240 hiAutomatonCegarLoop]: Abstraction has 50 states and 90 transitions. [2025-04-26 16:56:47,819 INFO L438 stractBuchiCegarLoop]: Abstraction has 50 states and 90 transitions. [2025-04-26 16:56:47,819 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:56:47,819 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 50 states and 90 transitions. [2025-04-26 16:56:47,820 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 26 [2025-04-26 16:56:47,820 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:56:47,820 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:56:47,821 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:56:47,821 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-04-26 16:56:47,821 INFO L752 eck$LassoCheckResult]: Stem: "[68] $Ultimate##0-->L21: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[52] L21-->L25-1: Formula: (<= v_z_2 v_x1_4) InVars {x1=v_x1_4, z=v_z_2} OutVars{x1=v_x1_4, z=v_z_2} AuxVars[] AssignedVars[]" [2025-04-26 16:56:47,821 INFO L754 eck$LassoCheckResult]: Loop: "[55] L25-1-->L27: Formula: (< v_x3_1 v_z_3) InVars {x3=v_x3_1, z=v_z_3} OutVars{x3=v_x3_1, z=v_z_3} AuxVars[] AssignedVars[]" "[58] L27-->L25-1: Formula: (= v_x3_2 (+ v_x3_3 1)) InVars {x3=v_x3_3} OutVars{x3=v_x3_2} AuxVars[] AssignedVars[x3]" [2025-04-26 16:56:47,821 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:47,824 INFO L85 PathProgramCache]: Analyzing trace with hash 3121, now seen corresponding path program 1 times [2025-04-26 16:56:47,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:47,824 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621526131] [2025-04-26 16:56:47,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:47,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:47,826 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:47,827 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:47,827 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,829 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:47,832 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:47,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:47,833 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,834 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:47,834 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:47,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2724, now seen corresponding path program 1 times [2025-04-26 16:56:47,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:47,834 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918969831] [2025-04-26 16:56:47,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:47,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:47,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:47,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:47,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,839 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:47,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:47,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:47,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,843 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:47,843 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash 3001044, now seen corresponding path program 1 times [2025-04-26 16:56:47,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:47,843 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155221670] [2025-04-26 16:56:47,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:47,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:47,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:56:47,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:56:47,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,846 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:47,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:56:47,848 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:56:47,848 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:47,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:47,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:47,867 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:56:47,867 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:56:47,867 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:56:47,867 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:56:47,868 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:56:47,868 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,868 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:56:47,868 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:56:47,868 INFO L132 ssoRankerPreferences]: Filename of dumped script: seq_loops_indep_2.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:56:47,868 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:56:47,868 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:56:47,868 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:56:47,888 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:56:47,888 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:56:47,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:47,892 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 16:56:47,894 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 16:56:47,895 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:56:47,895 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:56:47,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:47,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:47,917 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 16:56:47,918 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 16:56:47,920 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:56:47,921 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:56:47,988 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:56:47,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:47,993 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:56:47,993 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:56:47,993 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:56:47,993 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:56:47,993 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:56:47,993 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:47,993 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:56:47,993 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:56:47,993 INFO L132 ssoRankerPreferences]: Filename of dumped script: seq_loops_indep_2.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:56:47,993 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:56:47,993 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:56:47,994 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:56:48,019 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:56:48,019 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:56:48,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,022 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 16:56:48,023 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 16:56:48,024 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 16:56:48,034 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:56:48,035 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:56:48,035 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:56:48,035 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:56:48,035 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:56:48,036 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:56:48,036 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:56:48,040 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:56:48,043 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:56:48,043 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:56:48,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,045 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 16:56:48,047 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 16:56:48,049 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:56:48,051 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:56:48,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:48,053 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:56:48,053 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:56:48,053 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(x3, z) = -1*x3 + 1*z Supporting invariants [] [2025-04-26 16:56:48,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:48,061 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:56:48,078 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:48,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:48,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:48,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:56:48,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:56:48,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:56:48,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:48,090 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:48,090 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:56:48,091 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:56:48,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:56:48,106 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 16:56:48,106 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2025-04-26 16:56:48,106 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 50 states and 90 transitions. cyclomatic complexity: 56 Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (in total 4), 3 states have internal predecessors, (4), 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 16:56:48,138 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 50 states and 90 transitions. cyclomatic complexity: 56. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (in total 4), 3 states have internal predecessors, (4), 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 94 states and 183 transitions. Complement of second has 6 states. [2025-04-26 16:56:48,138 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 16:56:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (in total 4), 3 states have internal predecessors, (4), 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 16:56:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2025-04-26 16:56:48,139 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 2 letters. Loop has 2 letters. [2025-04-26 16:56:48,139 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:48,139 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 4 letters. Loop has 2 letters. [2025-04-26 16:56:48,139 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:48,139 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 2 letters. Loop has 4 letters. [2025-04-26 16:56:48,139 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:48,139 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 94 states and 183 transitions. [2025-04-26 16:56:48,141 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 12 [2025-04-26 16:56:48,141 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 94 states to 53 states and 103 transitions. [2025-04-26 16:56:48,141 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2025-04-26 16:56:48,142 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 29 [2025-04-26 16:56:48,142 INFO L74 IsDeterministic]: Start isDeterministic. Operand 53 states and 103 transitions. [2025-04-26 16:56:48,142 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:56:48,142 INFO L218 hiAutomatonCegarLoop]: Abstraction has 53 states and 103 transitions. [2025-04-26 16:56:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states and 103 transitions. [2025-04-26 16:56:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2025-04-26 16:56:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 49 states have (on average 1.9591836734693877) internal successors, (in total 96), 48 states have internal predecessors, (96), 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 16:56:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 96 transitions. [2025-04-26 16:56:48,144 INFO L240 hiAutomatonCegarLoop]: Abstraction has 49 states and 96 transitions. [2025-04-26 16:56:48,144 INFO L438 stractBuchiCegarLoop]: Abstraction has 49 states and 96 transitions. [2025-04-26 16:56:48,144 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:56:48,144 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 49 states and 96 transitions. [2025-04-26 16:56:48,145 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 12 [2025-04-26 16:56:48,145 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:56:48,145 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:56:48,145 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2025-04-26 16:56:48,145 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-04-26 16:56:48,145 INFO L752 eck$LassoCheckResult]: Stem: "[68] $Ultimate##0-->L21: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[52] L21-->L25-1: Formula: (<= v_z_2 v_x1_4) InVars {x1=v_x1_4, z=v_z_2} OutVars{x1=v_x1_4, z=v_z_2} AuxVars[] AssignedVars[]" "[54] L25-1-->thread1FINAL: Formula: (<= v_z_4 v_x3_4) InVars {x3=v_x3_4, z=v_z_4} OutVars{x3=v_x3_4, z=v_z_4} AuxVars[] AssignedVars[]" "[57] thread1FINAL-->thread1EXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[71] L12-->L34: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" [2025-04-26 16:56:48,145 INFO L754 eck$LassoCheckResult]: Loop: "[60] L34-->L36: Formula: (< v_x2_1 v_z_5) InVars {x2=v_x2_1, z=v_z_5} OutVars{x2=v_x2_1, z=v_z_5} AuxVars[] AssignedVars[]" "[63] L36-->L34: Formula: (= v_x2_2 (+ v_x2_3 1)) InVars {x2=v_x2_3} OutVars{x2=v_x2_2} AuxVars[] AssignedVars[x2]" [2025-04-26 16:56:48,147 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:48,147 INFO L85 PathProgramCache]: Analyzing trace with hash 93031443, now seen corresponding path program 1 times [2025-04-26 16:56:48,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:48,147 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232637412] [2025-04-26 16:56:48,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:48,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:48,149 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:56:48,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:56:48,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,150 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:48,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:56:48,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:56:48,156 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:48,157 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2884, now seen corresponding path program 1 times [2025-04-26 16:56:48,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:48,158 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922290750] [2025-04-26 16:56:48,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:48,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:48,162 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:48,162 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,162 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:48,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:48,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:48,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,166 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:48,167 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:48,167 INFO L85 PathProgramCache]: Analyzing trace with hash -791094570, now seen corresponding path program 1 times [2025-04-26 16:56:48,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:48,167 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391108221] [2025-04-26 16:56:48,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:48,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:48,169 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-26 16:56:48,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-26 16:56:48,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,173 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:48,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-26 16:56:48,177 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-26 16:56:48,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,178 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:48,190 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:56:48,190 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:56:48,190 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:56:48,190 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:56:48,190 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:56:48,190 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,190 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:56:48,190 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:56:48,190 INFO L132 ssoRankerPreferences]: Filename of dumped script: seq_loops_indep_2.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:56:48,190 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:56:48,190 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:56:48,190 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:56:48,205 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:56:48,206 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:56:48,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,208 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 16:56:48,209 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 16:56:48,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:56:48,211 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:56:48,227 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 16:56:48,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,229 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 16:56:48,230 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 16:56:48,231 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:56:48,231 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:56:48,292 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:56:48,297 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 16:56:48,297 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:56:48,297 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:56:48,297 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:56:48,297 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:56:48,297 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:56:48,297 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,297 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:56:48,297 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:56:48,297 INFO L132 ssoRankerPreferences]: Filename of dumped script: seq_loops_indep_2.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:56:48,297 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:56:48,297 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:56:48,298 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:56:48,318 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:56:48,318 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:56:48,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,320 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 16:56:48,321 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 16:56:48,323 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2025-04-26 16:56:48,332 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:56:48,333 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:56:48,333 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:56:48,333 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:56:48,333 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:56:48,334 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:56:48,334 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:56:48,336 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:56:48,340 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:56:48,340 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:56:48,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,342 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 16:56:48,342 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 16:56:48,343 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:56:48,346 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 16:56:48,346 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:56:48,346 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:56:48,346 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(x2, z) = -1*x2 + 1*z Supporting invariants [] [2025-04-26 16:56:48,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:48,353 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:56:48,364 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:48,367 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:56:48,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:56:48,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:56:48,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:56:48,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:56:48,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:48,377 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:48,377 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:56:48,378 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:56:48,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:56:48,389 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 16:56:48,390 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2025-04-26 16:56:48,390 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 49 states and 96 transitions. cyclomatic complexity: 59 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (in total 7), 3 states have internal predecessors, (7), 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 16:56:48,423 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 49 states and 96 transitions. cyclomatic complexity: 59. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (in total 7), 3 states have internal predecessors, (7), 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 117 states and 232 transitions. Complement of second has 6 states. [2025-04-26 16:56:48,424 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 16:56:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (in total 7), 3 states have internal predecessors, (7), 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 16:56:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2025-04-26 16:56:48,424 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 34 transitions. Stem has 5 letters. Loop has 2 letters. [2025-04-26 16:56:48,425 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:48,425 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 34 transitions. Stem has 7 letters. Loop has 2 letters. [2025-04-26 16:56:48,425 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:48,425 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 34 transitions. Stem has 5 letters. Loop has 4 letters. [2025-04-26 16:56:48,426 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:48,426 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 232 transitions. [2025-04-26 16:56:48,427 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 6 [2025-04-26 16:56:48,428 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 73 states and 137 transitions. [2025-04-26 16:56:48,428 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2025-04-26 16:56:48,428 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2025-04-26 16:56:48,428 INFO L74 IsDeterministic]: Start isDeterministic. Operand 73 states and 137 transitions. [2025-04-26 16:56:48,428 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:56:48,428 INFO L218 hiAutomatonCegarLoop]: Abstraction has 73 states and 137 transitions. [2025-04-26 16:56:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states and 137 transitions. [2025-04-26 16:56:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2025-04-26 16:56:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 68 states have (on average 1.8823529411764706) internal successors, (in total 128), 67 states have internal predecessors, (128), 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 16:56:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 128 transitions. [2025-04-26 16:56:48,435 INFO L240 hiAutomatonCegarLoop]: Abstraction has 68 states and 128 transitions. [2025-04-26 16:56:48,435 INFO L438 stractBuchiCegarLoop]: Abstraction has 68 states and 128 transitions. [2025-04-26 16:56:48,435 INFO L340 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2025-04-26 16:56:48,436 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 68 states and 128 transitions. [2025-04-26 16:56:48,436 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 6 [2025-04-26 16:56:48,436 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:56:48,436 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:56:48,436 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2025-04-26 16:56:48,436 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-04-26 16:56:48,437 INFO L752 eck$LassoCheckResult]: Stem: "[68] $Ultimate##0-->L21: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[52] L21-->L25-1: Formula: (<= v_z_2 v_x1_4) InVars {x1=v_x1_4, z=v_z_2} OutVars{x1=v_x1_4, z=v_z_2} AuxVars[] AssignedVars[]" "[54] L25-1-->thread1FINAL: Formula: (<= v_z_4 v_x3_4) InVars {x3=v_x3_4, z=v_z_4} OutVars{x3=v_x3_4, z=v_z_4} AuxVars[] AssignedVars[]" "[57] thread1FINAL-->thread1EXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[71] L12-->L34: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" "[59] L34-->L38-1: Formula: (<= v_z_6 v_x2_4) InVars {x2=v_x2_4, z=v_z_6} OutVars{x2=v_x2_4, z=v_z_6} AuxVars[] AssignedVars[]" [2025-04-26 16:56:48,437 INFO L754 eck$LassoCheckResult]: Loop: "[62] L38-1-->L40: Formula: (< v_x4_1 v_z_7) InVars {x4=v_x4_1, z=v_z_7} OutVars{x4=v_x4_1, z=v_z_7} AuxVars[] AssignedVars[]" "[65] L40-->L38-1: Formula: (= (+ v_x4_3 1) v_x4_2) InVars {x4=v_x4_3} OutVars{x4=v_x4_2} AuxVars[] AssignedVars[x4]" [2025-04-26 16:56:48,437 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1410992504, now seen corresponding path program 1 times [2025-04-26 16:56:48,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:48,437 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015883316] [2025-04-26 16:56:48,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:48,441 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:56:48,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:56:48,444 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,444 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:48,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:56:48,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:56:48,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:48,447 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:48,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2948, now seen corresponding path program 1 times [2025-04-26 16:56:48,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:48,452 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422718986] [2025-04-26 16:56:48,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:48,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:48,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:48,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:48,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,454 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:48,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:48,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:48,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,458 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:48,458 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:48,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1245871179, now seen corresponding path program 1 times [2025-04-26 16:56:48,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:56:48,458 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946471102] [2025-04-26 16:56:48,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:56:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:56:48,460 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:56:48,464 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:56:48,465 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,465 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:56:48,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:56:48,468 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:56:48,468 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:56:48,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:56:48,487 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:56:48,487 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:56:48,487 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:56:48,487 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:56:48,487 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:56:48,487 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,487 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:56:48,487 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:56:48,487 INFO L132 ssoRankerPreferences]: Filename of dumped script: seq_loops_indep_2.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:56:48,487 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:56:48,487 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:56:48,489 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:56:48,507 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:56:48,507 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:56:48,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,509 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 16:56:48,511 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 16:56:48,511 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:56:48,511 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:56:48,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:48,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,529 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 16:56:48,530 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 16:56:48,532 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:56:48,532 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:56:48,598 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:56:48,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:48,602 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:56:48,602 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:56:48,603 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:56:48,603 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:56:48,603 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:56:48,603 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,603 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:56:48,603 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:56:48,603 INFO L132 ssoRankerPreferences]: Filename of dumped script: seq_loops_indep_2.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:56:48,603 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:56:48,603 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:56:48,604 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:56:48,621 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:56:48,621 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:56:48,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,623 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 16:56:48,625 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 16:56:48,626 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 16:56:48,636 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:56:48,636 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:56:48,636 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:56:48,636 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:56:48,636 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:56:48,637 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:56:48,637 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:56:48,639 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:56:48,645 INFO L436 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-04-26 16:56:48,645 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:56:48,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:56:48,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:56:48,647 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 16:56:48,648 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 16:56:48,649 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:56:48,652 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:56:48,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2025-04-26 16:56:48,653 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:56:48,653 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:56:48,653 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z, x4) = 1*z - 1*x4 Supporting invariants [] [2025-04-26 16:56:48,660 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 16:56:48,662 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:56:48,675 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:56:48,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:56:48,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:56:48,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:56:48,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:56:48,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:56:48,697 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:56:48,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:56:48,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:56:48,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:56:48,700 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:56:48,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:56:48,715 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 16:56:48,716 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2025-04-26 16:56:48,716 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 128 transitions. cyclomatic complexity: 75 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (in total 8), 3 states have internal predecessors, (8), 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 16:56:48,755 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 128 transitions. cyclomatic complexity: 75. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (in total 8), 3 states have internal predecessors, (8), 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 101 states and 188 transitions. Complement of second has 6 states. [2025-04-26 16:56:48,756 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 16:56:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (in total 8), 3 states have internal predecessors, (8), 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 16:56:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2025-04-26 16:56:48,757 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 34 transitions. Stem has 6 letters. Loop has 2 letters. [2025-04-26 16:56:48,757 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:48,757 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 34 transitions. Stem has 8 letters. Loop has 2 letters. [2025-04-26 16:56:48,757 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:48,757 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 34 transitions. Stem has 6 letters. Loop has 4 letters. [2025-04-26 16:56:48,757 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:56:48,757 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 188 transitions. [2025-04-26 16:56:48,758 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:56:48,758 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 0 states and 0 transitions. [2025-04-26 16:56:48,758 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:56:48,758 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:56:48,758 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:56:48,758 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:56:48,758 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:56:48,758 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:56:48,758 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:56:48,758 INFO L340 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2025-04-26 16:56:48,759 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:56:48,759 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:56:48,759 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:56:48,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Ended with exit code 0 [2025-04-26 16:56:48,773 INFO L201 PluginConnector]: Adding new model seq_loops_indep_2.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:56:48 BoogieIcfgContainer [2025-04-26 16:56:48,773 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:56:48,773 INFO L158 Benchmark]: Toolchain (without parser) took 2082.23ms. Allocated memory was 159.4MB in the beginning and 155.2MB in the end (delta: -4.2MB). Free memory was 86.6MB in the beginning and 53.7MB in the end (delta: 32.8MB). Peak memory consumption was 31.7MB. Max. memory is 8.0GB. [2025-04-26 16:56:48,773 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:56:48,774 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.00ms. Allocated memory is still 159.4MB. Free memory was 86.6MB in the beginning and 84.7MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:56:48,774 INFO L158 Benchmark]: Boogie Preprocessor took 21.50ms. Allocated memory is still 159.4MB. Free memory was 84.6MB in the beginning and 82.8MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-26 16:56:48,774 INFO L158 Benchmark]: RCFGBuilder took 169.93ms. Allocated memory is still 159.4MB. Free memory was 82.8MB in the beginning and 74.0MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-26 16:56:48,774 INFO L158 Benchmark]: BuchiAutomizer took 1857.18ms. Allocated memory was 159.4MB in the beginning and 155.2MB in the end (delta: -4.2MB). Free memory was 73.9MB in the beginning and 53.7MB in the end (delta: 20.2MB). Peak memory consumption was 19.2MB. Max. memory is 8.0GB. [2025-04-26 16:56:48,775 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 0.18ms. Allocated memory is still 159.4MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.00ms. Allocated memory is still 159.4MB. Free memory was 86.6MB in the beginning and 84.7MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 21.50ms. Allocated memory is still 159.4MB. Free memory was 84.6MB in the beginning and 82.8MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 169.93ms. Allocated memory is still 159.4MB. Free memory was 82.8MB in the beginning and 74.0MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 1857.18ms. Allocated memory was 159.4MB in the beginning and 155.2MB in the end (delta: -4.2MB). Free memory was 73.9MB in the beginning and 53.7MB in the end (delta: 20.2MB). Peak memory consumption was 19.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.7s and 5 iterations. TraceHistogramMax:1. Analysis of lassos took 1.1s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [4, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 110 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 106 mSDsluCounter, 89 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 39 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 127 IncrementalHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 50 mSDtfsCounter, 127 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf94 smp100 dnf100 smp100 tf111 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 40ms VariablesStem: 0 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s InitialAbstractionConstructionTime: 0.1s InitialAbstraction: Time to compute Ample Reduction [ms]: 123, Number of transitions in reduction automaton: 90, Number of states in reduction automaton: 51, 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 + z and consists of 4 locations. One deterministic module has affine ranking function -1 * x3 + z and consists of 4 locations. One deterministic module has affine ranking function z + -1 * x2 and consists of 4 locations. One deterministic module has affine ranking function -1 * x4 + z 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 16:56:48,789 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...