/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 ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:54:13,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:54:13,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/gemcutter/Termination.epf [2025-04-26 16:54:13,825 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:54:13,825 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:54:13,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Check unreachability of error function in SV-COMP mode [2025-04-26 16:54:13,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2025-04-26 16:54:13,848 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:54:13,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:54:13,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:54:13,849 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:54:13,849 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:54:13,849 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:54:13,849 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:54:13,849 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * Automaton type for concurrent programs=PARTIAL_ORDER_BA [2025-04-26 16:54:13,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:54:13,850 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:54:13,851 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:54:13,851 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:54:13,852 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:54:13,852 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:54:13,852 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:54:13,852 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:54:13,852 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:54:13,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 [2025-04-26 16:54:13,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:54:13,852 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:54:13,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-26 16:54:13,852 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-26 16:54:13,852 INFO L153 SettingsManager]: * Use conditional POR in concurrent analysis=false [2025-04-26 16:54:13,853 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:54:13,853 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:54:14,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:54:14,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:54:14,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:54:14,105 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:54:14,105 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:54:14,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl [2025-04-26 16:54:14,108 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2025-04-26 16:54:14,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:54:14,128 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:54:14,129 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:54:14,129 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:54:14,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:54:14,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,155 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,160 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:54:14,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:54:14,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:54:14,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:54:14,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:54:14,168 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,170 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,172 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,172 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,175 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,176 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,176 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,186 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:54:14,187 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:54:14,187 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:54:14,187 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:54:14,191 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/1) ... [2025-04-26 16:54:14,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 [2025-04-26 16:54:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:14,214 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 16:54:14,217 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 16:54:14,239 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-04-26 16:54:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:54:14,239 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:54:14,239 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-04-26 16:54:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:54:14,239 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:54:14,239 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-04-26 16:54:14,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:54:14,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:54:14,240 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 16:54:14,275 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:54:14,277 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:54:14,338 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:54:14,338 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:54:14,373 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:54:14,374 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-04-26 16:54:14,374 INFO L201 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:54:14 BoogieIcfgContainer [2025-04-26 16:54:14,374 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:54:14,375 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:54:14,375 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:54:14,384 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:54:14,385 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:54:14,385 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:54:14" (1/2) ... [2025-04-26 16:54:14,386 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3a8bcd63 and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:54:14, skipping insertion in model container [2025-04-26 16:54:14,387 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:54:14,387 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:54:14" (2/2) ... [2025-04-26 16:54:14,388 INFO L376 chiAutomizerObserver]: Analyzing ICFG fibonacci.wvr.bpl [2025-04-26 16:54:14,439 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-26 16:54:14,491 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-26 16:54:14,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-04-26 16:54:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:14,495 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 16:54:14,496 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 16:54:14,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 21 transitions, 56 flow [2025-04-26 16:54:14,557 INFO L116 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-04-26 16:54:14,558 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-26 16:54:14,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-04-26 16:54:14,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 21 transitions, 56 flow [2025-04-26 16:54:14,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 17 transitions, 46 flow [2025-04-26 16:54:14,568 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 22 places, 17 transitions, 46 flow [2025-04-26 16:54:14,574 INFO L135 AmpleReduction]: Starting ample reduction [2025-04-26 16:54:14,604 WARN L275 AmpleReduction]: Non-loop node is now a loop node: 49#[L42, thread1EXIT, L60]true [2025-04-26 16:54:14,606 WARN L275 AmpleReduction]: Non-loop node is now a loop node: 35#[L24, L59-1]true [2025-04-26 16:54:14,607 WARN L275 AmpleReduction]: Non-loop node is now a loop node: 75#[L42, thread1FINAL, L60]true [2025-04-26 16:54:14,608 WARN L275 AmpleReduction]: Non-loop node is now a loop node: 71#[L24, L42, L60]true [2025-04-26 16:54:14,608 WARN L275 AmpleReduction]: Non-loop node is now a loop node: 73#[L24, thread2FINAL, L60]true [2025-04-26 16:54:14,609 WARN L140 AmpleReduction]: Number of pruned transitions: 8 [2025-04-26 16:54:14,609 WARN L141 AmpleReduction]: Loop nodes with "changing loop node status": 5 [2025-04-26 16:54:14,610 WARN L142 AmpleReduction]: Number of trivial sets caused by loops: 5 [2025-04-26 16:54:14,610 WARN L143 AmpleReduction]: Number of not loop caused trivial ample sets:13 [2025-04-26 16:54:14,610 WARN L144 AmpleReduction]: Number of initially assigned non-trivial ample sets:11 [2025-04-26 16:54:14,610 WARN L145 AmpleReduction]: Times succ was already a loop node:0 [2025-04-26 16:54:14,610 WARN L146 AmpleReduction]: Times some other node on the cycle already had a trivial ample set:0 [2025-04-26 16:54:14,610 INFO L149 AmpleReduction]: Finished ample reduction [2025-04-26 16:54:14,612 INFO L136 dAbstractionProvider]: Constructed initial ample set-reduced NBA abstraction that has 25 states, 23 states have (on average 1.565217391304348) internal successors, (in total 36), 24 states have internal predecessors, (36), 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 16:54:14,617 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:54:14,617 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:54:14,617 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:54:14,617 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:54:14,617 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:54:14,617 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:54:14,617 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:54:14,617 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:54:14,618 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (in total 36), 24 states have internal predecessors, (36), 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 16:54:14,627 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 7 [2025-04-26 16:54:14,627 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:54:14,627 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:54:14,630 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:54:14,630 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2025-04-26 16:54:14,630 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:54:14,631 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (in total 36), 24 states have internal predecessors, (36), 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 16:54:14,632 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 7 [2025-04-26 16:54:14,632 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:54:14,632 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:54:14,632 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:54:14,632 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2025-04-26 16:54:14,636 INFO L752 eck$LassoCheckResult]: Stem: "[55] $Ultimate##0-->L59: Formula: (and (= v_f1_2_5 v_f1_6_5) (= v_f2_7_4 v_f2_3_4)) InVars {f2_7=v_f2_7_4, f1_6=v_f1_6_5, f2_3=v_f2_3_4, f1_2=v_f1_2_5} OutVars{f2_7=v_f2_7_4, f1_6=v_f1_6_5, f2_3=v_f2_3_4, f1_2=v_f1_2_5} AuxVars[] AssignedVars[]" "[68] L59-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[58] $Ultimate##0-->L24: Formula: (= v_i_1_1 0) InVars {} OutVars{i_1=v_i_1_1} AuxVars[] AssignedVars[i_1]" [2025-04-26 16:54:14,636 INFO L754 eck$LassoCheckResult]: Loop: "[60] L24-->L24: Formula: (and (= v_f1_2_14 (+ v_f1_2_15 v_f2_3_14)) (= (+ v_f2_3_14 v_f2_3_13) v_f1_2_14) (< v_i_1_17 v_n_0_7) (= v_i_1_16 (+ v_i_1_17 1))) InVars {n_0=v_n_0_7, f2_3=v_f2_3_14, f1_2=v_f1_2_15, i_1=v_i_1_17} OutVars{n_0=v_n_0_7, f2_3=v_f2_3_13, f1_2=v_f1_2_14, i_1=v_i_1_16} AuxVars[] AssignedVars[f2_3, f1_2, i_1]" [2025-04-26 16:54:14,639 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:54:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash 84812, now seen corresponding path program 1 times [2025-04-26 16:54:14,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:54:14,645 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235715991] [2025-04-26 16:54:14,645 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:54:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:54:14,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:54:14,695 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:54:14,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:14,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:14,696 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:54:14,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:54:14,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:54:14,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:14,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:14,715 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:54:14,718 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:54:14,718 INFO L85 PathProgramCache]: Analyzing trace with hash 91, now seen corresponding path program 1 times [2025-04-26 16:54:14,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:54:14,718 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79367744] [2025-04-26 16:54:14,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:54:14,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:54:14,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:54:14,732 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:54:14,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:14,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:14,732 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:54:14,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:54:14,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:54:14,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:14,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:14,741 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:54:14,743 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:54:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2629232, now seen corresponding path program 1 times [2025-04-26 16:54:14,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:54:14,743 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308824691] [2025-04-26 16:54:14,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:54:14,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:54:14,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:54:14,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:54:14,755 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:14,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:14,756 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:54:14,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:54:14,764 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:54:14,764 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:14,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:14,768 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:54:14,837 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:54:14,838 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:54:14,838 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:54:14,838 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:54:14,838 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:54:14,838 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:14,838 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:54:14,839 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:54:14,839 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibonacci.wvr.bpl_petrified1_Iteration1_Loop [2025-04-26 16:54:14,839 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:54:14,839 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:54:14,850 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:54:14,866 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:54:14,915 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:54:14,916 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:54:14,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:14,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:14,919 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 16:54:14,921 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 16:54:14,923 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:54:14,923 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:54:14,947 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:54:14,947 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f2_3=0, f1_2=0} Honda state: {f2_3=0, f1_2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2025-04-26 16:54:14,953 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 16:54:14,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:14,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:14,956 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 16:54:14,957 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 16:54:14,958 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:54:14,958 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:54:14,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2025-04-26 16:54:14,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:14,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:14,976 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 16:54:14,977 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 16:54:14,978 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:54:14,979 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:54:15,052 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:54:15,057 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 16:54:15,057 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:54:15,058 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:54:15,058 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:54:15,058 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:54:15,058 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:54:15,058 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,058 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:54:15,058 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:54:15,058 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibonacci.wvr.bpl_petrified1_Iteration1_Loop [2025-04-26 16:54:15,058 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:54:15,058 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:54:15,059 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:54:15,065 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:54:15,129 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:54:15,134 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:54:15,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:15,138 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 16:54:15,139 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 16:54:15,140 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 16:54:15,152 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:54:15,152 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:54:15,153 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:54:15,153 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:54:15,153 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:54:15,157 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:54:15,157 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:54:15,159 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:54:15,165 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 16:54:15,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:15,167 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 16:54:15,169 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 16:54:15,170 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 16:54:15,180 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:54:15,180 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:54:15,180 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:54:15,180 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:54:15,180 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:54:15,181 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:54:15,181 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:54:15,184 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:54:15,186 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:54:15,186 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:54:15,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:15,189 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 16:54:15,191 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 16:54:15,192 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:54:15,195 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:54:15,196 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 16:54:15,196 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:54:15,196 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:54:15,196 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(n_0, i_1) = 1*n_0 - 1*i_1 Supporting invariants [] [2025-04-26 16:54:15,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2025-04-26 16:54:15,204 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:54:15,247 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:54:15,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:54:15,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:54:15,257 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:54:15,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:54:15,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:54:15,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:54:15,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:54:15,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:54:15,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:54:15,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:54:15,272 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 16:54:15,294 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2025-04-26 16:54:15,297 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (in total 36), 24 states have internal predecessors, (36), 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 2 states, 2 states have (on average 2.0) internal successors, (in total 4), 2 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 16:54:15,362 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (in total 36), 24 states have internal predecessors, (36), 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 2 states, 2 states have (on average 2.0) internal successors, (in total 4), 2 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 54 states and 93 transitions. Complement of second has 5 states. [2025-04-26 16:54:15,363 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2025-04-26 16:54:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.0) internal successors, (in total 4), 2 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 16:54:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 23 transitions. [2025-04-26 16:54:15,370 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 3 letters. Loop has 1 letters. [2025-04-26 16:54:15,371 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:54:15,371 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 4 letters. Loop has 1 letters. [2025-04-26 16:54:15,371 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:54:15,371 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 3 letters. Loop has 2 letters. [2025-04-26 16:54:15,371 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:54:15,372 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 93 transitions. [2025-04-26 16:54:15,375 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2025-04-26 16:54:15,377 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 18 states and 31 transitions. [2025-04-26 16:54:15,378 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2025-04-26 16:54:15,378 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2025-04-26 16:54:15,379 INFO L74 IsDeterministic]: Start isDeterministic. Operand 18 states and 31 transitions. [2025-04-26 16:54:15,380 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:54:15,380 INFO L218 hiAutomatonCegarLoop]: Abstraction has 18 states and 31 transitions. [2025-04-26 16:54:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 31 transitions. [2025-04-26 16:54:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2025-04-26 16:54:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.75) internal successors, (in total 28), 15 states have internal predecessors, (28), 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 16:54:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 28 transitions. [2025-04-26 16:54:15,397 INFO L240 hiAutomatonCegarLoop]: Abstraction has 16 states and 28 transitions. [2025-04-26 16:54:15,397 INFO L438 stractBuchiCegarLoop]: Abstraction has 16 states and 28 transitions. [2025-04-26 16:54:15,398 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:54:15,398 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 28 transitions. [2025-04-26 16:54:15,398 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2025-04-26 16:54:15,398 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:54:15,398 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:54:15,398 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2025-04-26 16:54:15,398 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2025-04-26 16:54:15,399 INFO L752 eck$LassoCheckResult]: Stem: "[55] $Ultimate##0-->L59: Formula: (and (= v_f1_2_5 v_f1_6_5) (= v_f2_7_4 v_f2_3_4)) InVars {f2_7=v_f2_7_4, f1_6=v_f1_6_5, f2_3=v_f2_3_4, f1_2=v_f1_2_5} OutVars{f2_7=v_f2_7_4, f1_6=v_f1_6_5, f2_3=v_f2_3_4, f1_2=v_f1_2_5} AuxVars[] AssignedVars[]" "[68] L59-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[58] $Ultimate##0-->L24: Formula: (= v_i_1_1 0) InVars {} OutVars{i_1=v_i_1_1} AuxVars[] AssignedVars[i_1]" "[71] L59-1-->$Ultimate##0: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" "[62] $Ultimate##0-->L42: Formula: (= v_i_5_5 0) InVars {} OutVars{i_5=v_i_5_5} AuxVars[] AssignedVars[i_5]" [2025-04-26 16:54:15,399 INFO L754 eck$LassoCheckResult]: Loop: "[63] L42-->L42: Formula: (and (< v_i_5_15 v_n_0_9) (= (+ v_f2_7_14 v_f2_7_13) v_f1_6_12) (= (+ v_i_5_15 1) v_i_5_14) (= (+ v_f1_6_13 v_f2_7_14) v_f1_6_12)) InVars {f2_7=v_f2_7_14, n_0=v_n_0_9, f1_6=v_f1_6_13, i_5=v_i_5_15} OutVars{f2_7=v_f2_7_13, n_0=v_n_0_9, f1_6=v_f1_6_12, i_5=v_i_5_14} AuxVars[] AssignedVars[i_5, f2_7, f1_6]" [2025-04-26 16:54:15,399 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:54:15,399 INFO L85 PathProgramCache]: Analyzing trace with hash 81506595, now seen corresponding path program 1 times [2025-04-26 16:54:15,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:54:15,399 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203581440] [2025-04-26 16:54:15,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:54:15,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:54:15,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:54:15,405 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:54:15,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:15,405 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:54:15,406 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:54:15,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:54:15,409 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:15,413 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:54:15,413 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:54:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash 94, now seen corresponding path program 1 times [2025-04-26 16:54:15,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:54:15,413 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002815187] [2025-04-26 16:54:15,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:54:15,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:54:15,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:54:15,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:54:15,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:15,418 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:54:15,419 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:54:15,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:54:15,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:15,421 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:54:15,421 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:54:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1768262788, now seen corresponding path program 1 times [2025-04-26 16:54:15,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:54:15,421 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902949401] [2025-04-26 16:54:15,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:54:15,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:54:15,424 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:54:15,428 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:54:15,428 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:15,429 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:54:15,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:54:15,433 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:54:15,433 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:54:15,434 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:54:15,466 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:54:15,466 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:54:15,466 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:54:15,466 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:54:15,466 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:54:15,466 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,466 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:54:15,466 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:54:15,466 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibonacci.wvr.bpl_petrified1_Iteration2_Loop [2025-04-26 16:54:15,466 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:54:15,466 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:54:15,467 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:54:15,473 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:54:15,510 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:54:15,510 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:54:15,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:15,512 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 16:54:15,514 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 16:54:15,515 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:54:15,515 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:54:15,532 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 16:54:15,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:15,534 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 16:54:15,536 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 16:54:15,539 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:54:15,539 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:54:15,604 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:54:15,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2025-04-26 16:54:15,609 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:54:15,609 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:54:15,609 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:54:15,609 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:54:15,609 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:54:15,609 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,609 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:54:15,609 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:54:15,609 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibonacci.wvr.bpl_petrified1_Iteration2_Loop [2025-04-26 16:54:15,609 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:54:15,609 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:54:15,610 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:54:15,617 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:54:15,646 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:54:15,646 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:54:15,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:15,648 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 16:54:15,649 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 16:54:15,650 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 16:54:15,661 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:54:15,661 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:54:15,661 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:54:15,661 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:54:15,661 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:54:15,662 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:54:15,662 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:54:15,664 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:54:15,666 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:54:15,666 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:54:15,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:54:15,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:54:15,668 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 16:54:15,670 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 16:54:15,670 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:54:15,674 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 16:54:15,674 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:54:15,674 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:54:15,674 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(n_0, i_5) = 1*n_0 - 1*i_5 Supporting invariants [] [2025-04-26 16:54:15,680 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 16:54:15,681 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:54:15,693 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:54:15,698 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:54:15,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:54:15,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:54:15,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:54:15,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:54:15,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:54:15,710 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:54:15,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:54:15,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:54:15,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:54:15,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:54:15,711 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 16:54:15,711 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2025-04-26 16:54:15,711 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 28 transitions. cyclomatic complexity: 18 Second operand has 2 states, 2 states have (on average 3.0) internal successors, (in total 6), 2 states have internal predecessors, (6), 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 16:54:15,727 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 28 transitions. cyclomatic complexity: 18. Second operand has 2 states, 2 states have (on average 3.0) internal successors, (in total 6), 2 states have internal predecessors, (6), 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 25 states and 42 transitions. Complement of second has 4 states. [2025-04-26 16:54:15,727 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2025-04-26 16:54:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.0) internal successors, (in total 6), 2 states have internal predecessors, (6), 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 16:54:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 15 transitions. [2025-04-26 16:54:15,729 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 3 states and 15 transitions. Stem has 5 letters. Loop has 1 letters. [2025-04-26 16:54:15,729 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:54:15,729 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 3 states and 15 transitions. Stem has 6 letters. Loop has 1 letters. [2025-04-26 16:54:15,729 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:54:15,729 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 3 states and 15 transitions. Stem has 5 letters. Loop has 2 letters. [2025-04-26 16:54:15,729 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:54:15,729 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 42 transitions. [2025-04-26 16:54:15,732 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:54:15,732 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 0 states and 0 transitions. [2025-04-26 16:54:15,732 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:54:15,732 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:54:15,732 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:54:15,732 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:54:15,732 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:54:15,732 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:54:15,732 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:54:15,732 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:54:15,732 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:54:15,732 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:54:15,732 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:54:15,744 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 16:54:15,746 INFO L201 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:54:15 BoogieIcfgContainer [2025-04-26 16:54:15,746 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:54:15,747 INFO L158 Benchmark]: Toolchain (without parser) took 1619.23ms. Allocated memory was 163.6MB in the beginning and 125.8MB in the end (delta: -37.7MB). Free memory was 90.3MB in the beginning and 66.8MB in the end (delta: 23.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:54:15,747 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.86ms. Allocated memory is still 163.6MB. Free memory is still 91.2MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:54:15,747 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.78ms. Allocated memory is still 163.6MB. Free memory was 90.0MB in the beginning and 88.2MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:54:15,748 INFO L158 Benchmark]: Boogie Preprocessor took 22.99ms. Allocated memory is still 163.6MB. Free memory was 88.2MB in the beginning and 87.2MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-26 16:54:15,748 INFO L158 Benchmark]: RCFGBuilder took 187.72ms. Allocated memory is still 163.6MB. Free memory was 87.2MB in the beginning and 76.9MB in the end (delta: 10.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-26 16:54:15,748 INFO L158 Benchmark]: BuchiAutomizer took 1371.14ms. Allocated memory was 163.6MB in the beginning and 125.8MB in the end (delta: -37.7MB). Free memory was 76.9MB in the beginning and 66.8MB in the end (delta: 10.1MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:54:15,749 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 0.86ms. Allocated memory is still 163.6MB. Free memory is still 91.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.78ms. Allocated memory is still 163.6MB. Free memory was 90.0MB in the beginning and 88.2MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 22.99ms. Allocated memory is still 163.6MB. Free memory was 88.2MB in the beginning and 87.2MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 187.72ms. Allocated memory is still 163.6MB. Free memory was 87.2MB in the beginning and 76.9MB in the end (delta: 10.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * BuchiAutomizer took 1371.14ms. Allocated memory was 163.6MB in the beginning and 125.8MB in the end (delta: -37.7MB). Free memory was 76.9MB in the beginning and 66.8MB in the end (delta: 10.1MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.2s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 0.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 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 [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25 IncrementalHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 11 mSDtfsCounter, 25 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital22 mio100 ax100 hnf100 lsp54 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq200 hnf91 smp100 dnf100 smp100 tf109 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 25ms VariablesStem: 0 VariablesLoop: 4 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s InitialAbstractionConstructionTime: 0.1s InitialAbstraction: Time to compute Ample Reduction [ms]: 127, Number of transitions in reduction automaton: 36, Number of states in reduction automaton: 25, Underlying: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (0 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function n_0 + -1 * i_1 and consists of 4 locations. One deterministic module has affine ranking function -1 * i_5 + n_0 and consists of 3 locations. - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2025-04-26 16:54:15,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...