/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -i ../../../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 16:21:52,711 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:21:52,773 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2025-04-26 16:21:52,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:21:52,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:21:52,806 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:21:52,807 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:21:52,807 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:21:52,807 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:21:52,807 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:21:52,807 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:21:52,808 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:21:52,808 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:21:52,809 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:21:52,809 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:21:52,809 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:21:52,809 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:21:52,809 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:21:52,810 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:21:52,810 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:21:52,811 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:21:52,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:21:52,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:21:52,811 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:21:52,811 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:21:53,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:21:53,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:21:53,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:21:53,051 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:21:53,053 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:21:53,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl [2025-04-26 16:21:53,054 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2025-04-26 16:21:53,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:21:53,079 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:21:53,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:21:53,080 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:21:53,080 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:21:53,087 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,108 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,112 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:21:53,113 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:21:53,115 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:21:53,115 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:21:53,115 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:21:53,119 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,119 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,121 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,121 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,123 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,123 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,126 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,126 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,126 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 04:21:53" (1/1) ... [2025-04-26 16:21:53,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:21:53,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:21:53,140 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:21:53,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:21:53,141 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:21:53" (1/1) ... [2025-04-26 16:21:53,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:53,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:53,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:21:53,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2025-04-26 16:21:53,189 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-04-26 16:21:53,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:21:53,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:21:53,190 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-04-26 16:21:53,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:21:53,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:21:53,191 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-04-26 16:21:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:21:53,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:21:53,192 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 16:21:53,227 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:21:53,228 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:21:53,319 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:21:53,319 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:21:53,351 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:21:53,351 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-04-26 16:21:53,352 INFO L201 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:21:53 BoogieIcfgContainer [2025-04-26 16:21:53,352 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:21:53,354 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:21:53,354 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:21:53,358 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:21:53,359 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:21:53,360 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:21:53" (1/2) ... [2025-04-26 16:21:53,361 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@610de0a1 and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:21:53, skipping insertion in model container [2025-04-26 16:21:53,361 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:21:53,361 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 04:21:53" (2/2) ... [2025-04-26 16:21:53,362 INFO L376 chiAutomizerObserver]: Analyzing ICFG fibonacci.wvr.bpl [2025-04-26 16:21:53,412 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-26 16:21:53,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 21 transitions, 56 flow [2025-04-26 16:21:53,467 INFO L116 PetriNetUnfolderBase]: 2/17 cut-off events. [2025-04-26 16:21:53,470 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-26 16:21:53,474 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 16:21:53,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 21 transitions, 56 flow [2025-04-26 16:21:53,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 17 transitions, 46 flow [2025-04-26 16:21:53,478 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 22 places, 17 transitions, 46 flow [2025-04-26 16:21:53,488 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:21:53,488 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:21:53,488 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:21:53,488 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:21:53,488 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:21:53,488 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:21:53,489 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:21:53,489 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:21:53,490 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2025-04-26 16:21:53,509 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 9 [2025-04-26 16:21:53,509 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:21:53,509 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:21:53,513 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:21:53,513 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2025-04-26 16:21:53,513 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:21:53,515 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 30 states, but on-demand construction may add more states [2025-04-26 16:21:53,517 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 9 [2025-04-26 16:21:53,517 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:21:53,517 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:21:53,517 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:21:53,517 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2025-04-26 16:21:53,521 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] $Ultimate##0-->L24: Formula: (= v_i_1_1 0) InVars {} OutVars{i_1=v_i_1_1} AuxVars[] AssignedVars[i_1]" [2025-04-26 16:21:53,522 INFO L754 eck$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 16:21:53,525 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:21:53,526 INFO L85 PathProgramCache]: Analyzing trace with hash 84812, now seen corresponding path program 1 times [2025-04-26 16:21:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:21:53,531 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835901652] [2025-04-26 16:21:53,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:21:53,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:21:53,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:21:53,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:21:53,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:53,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:53,577 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:21:53,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:21:53,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:21:53,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:53,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:53,600 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:21:53,602 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:21:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash 91, now seen corresponding path program 1 times [2025-04-26 16:21:53,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:21:53,602 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272295747] [2025-04-26 16:21:53,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:21:53,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:21:53,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:21:53,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:21:53,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:53,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:53,610 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:21:53,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:21:53,612 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:21:53,612 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:53,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:53,614 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:21:53,615 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:21:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2629232, now seen corresponding path program 1 times [2025-04-26 16:21:53,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:21:53,615 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229647330] [2025-04-26 16:21:53,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:21:53,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:21:53,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:21:53,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:21:53,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:53,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:53,621 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:21:53,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:21:53,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:21:53,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:53,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:53,626 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:21:53,691 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:21:53,694 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:21:53,694 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:21:53,694 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:21:53,694 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:21:53,694 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:53,694 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:21:53,694 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:21:53,694 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibonacci.wvr.bpl_petrified1_Iteration1_Loop [2025-04-26 16:21:53,694 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:21:53,695 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:21:53,706 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:21:53,727 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:21:53,779 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:21:53,779 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:21:53,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:53,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:21:53,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2025-04-26 16:21:53,785 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:21:53,785 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:21:53,807 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:21:53,807 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 16:21:53,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2025-04-26 16:21:53,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:53,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:53,816 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 16:21:53,818 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 16:21:53,819 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:21:53,819 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:21:53,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2025-04-26 16:21:53,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:53,841 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 16:21:53,843 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 16:21:53,844 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:21:53,845 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:21:53,914 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:21:53,918 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 16:21:53,918 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:21:53,918 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:21:53,918 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:21:53,918 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:21:53,918 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:21:53,919 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:53,919 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:21:53,919 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:21:53,919 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibonacci.wvr.bpl_petrified1_Iteration1_Loop [2025-04-26 16:21:53,919 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:21:53,919 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:21:53,921 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:21:53,927 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:21:53,962 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:21:53,964 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:21:53,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:53,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:53,967 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 16:21:53,984 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 16:21:53,985 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 16:21:53,997 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:21:53,997 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:21:53,998 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:21:53,998 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:21:53,998 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:21:54,004 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:21:54,004 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:21:54,007 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:21:54,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2025-04-26 16:21:54,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:54,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:54,015 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 16:21:54,015 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 16:21:54,017 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 16:21:54,028 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:21:54,028 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:21:54,028 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:21:54,028 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:21:54,028 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:21:54,031 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:21:54,031 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:21:54,034 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:21:54,037 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:21:54,037 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:21:54,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:54,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:54,042 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 16:21:54,043 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 16:21:54,044 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:21:54,047 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:21:54,048 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 16:21:54,048 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:21:54,048 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:21:54,049 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 16:21:54,055 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 16:21:54,057 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:21:54,075 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:21:54,084 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:21:54,087 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:21:54,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:21:54,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:21:54,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:21:54,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:21:54,100 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:21:54,100 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:21:54,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:21:54,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:21:54,103 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 16:21:54,144 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 16:21:54,157 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 30 states, but on-demand construction may add more states 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 16:21:54,241 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 30 states, but on-demand construction may add more states. 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 68 states and 150 transitions. Complement of second has 5 states. [2025-04-26 16:21:54,242 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 16:21:54,245 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 16:21:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 29 transitions. [2025-04-26 16:21:54,249 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 29 transitions. Stem has 3 letters. Loop has 1 letters. [2025-04-26 16:21:54,250 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:21:54,250 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 29 transitions. Stem has 4 letters. Loop has 1 letters. [2025-04-26 16:21:54,250 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:21:54,250 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 29 transitions. Stem has 3 letters. Loop has 2 letters. [2025-04-26 16:21:54,250 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:21:54,250 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 150 transitions. [2025-04-26 16:21:54,254 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 5 [2025-04-26 16:21:54,256 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 26 states and 59 transitions. [2025-04-26 16:21:54,257 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2025-04-26 16:21:54,257 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2025-04-26 16:21:54,258 INFO L74 IsDeterministic]: Start isDeterministic. Operand 26 states and 59 transitions. [2025-04-26 16:21:54,258 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:21:54,258 INFO L218 hiAutomatonCegarLoop]: Abstraction has 26 states and 59 transitions. [2025-04-26 16:21:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 59 transitions. [2025-04-26 16:21:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2025-04-26 16:21:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (in total 53), 22 states have internal predecessors, (53), 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 16:21:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 53 transitions. [2025-04-26 16:21:54,273 INFO L240 hiAutomatonCegarLoop]: Abstraction has 23 states and 53 transitions. [2025-04-26 16:21:54,273 INFO L438 stractBuchiCegarLoop]: Abstraction has 23 states and 53 transitions. [2025-04-26 16:21:54,274 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:21:54,274 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 53 transitions. [2025-04-26 16:21:54,274 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 5 [2025-04-26 16:21:54,274 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:21:54,274 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:21:54,275 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2025-04-26 16:21:54,275 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2025-04-26 16:21:54,275 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]" "[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] $Ultimate##0-->L42: Formula: (= v_i_5_5 0) InVars {} OutVars{i_5=v_i_5_5} AuxVars[] AssignedVars[i_5]" [2025-04-26 16:21:54,275 INFO L754 eck$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 16:21:54,276 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:21:54,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2629637, now seen corresponding path program 1 times [2025-04-26 16:21:54,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:21:54,276 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626581608] [2025-04-26 16:21:54,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:21:54,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:21:54,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:21:54,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:21:54,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:54,283 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:21:54,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:21:54,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:21:54,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:54,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:21:54,287 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:21:54,287 INFO L85 PathProgramCache]: Analyzing trace with hash 94, now seen corresponding path program 1 times [2025-04-26 16:21:54,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:21:54,287 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462591234] [2025-04-26 16:21:54,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:21:54,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:21:54,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:21:54,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:21:54,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:54,291 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:21:54,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:21:54,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:21:54,294 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:54,295 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:21:54,295 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:21:54,295 INFO L85 PathProgramCache]: Analyzing trace with hash 81518810, now seen corresponding path program 1 times [2025-04-26 16:21:54,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:21:54,295 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717606071] [2025-04-26 16:21:54,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:21:54,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:21:54,300 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:21:54,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:21:54,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:54,305 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:21:54,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:21:54,309 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:21:54,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:21:54,311 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:21:54,337 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:21:54,338 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:21:54,338 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:21:54,338 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:21:54,338 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:21:54,338 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:54,338 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:21:54,338 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:21:54,338 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibonacci.wvr.bpl_petrified1_Iteration2_Loop [2025-04-26 16:21:54,338 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:21:54,338 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:21:54,338 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:21:54,343 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:21:54,372 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:21:54,372 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:21:54,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:54,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:54,374 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 16:21:54,376 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 16:21:54,377 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:21:54,377 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:21:54,394 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 16:21:54,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:54,396 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 16:21:54,397 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 16:21:54,399 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:21:54,399 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:21:54,466 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:21:54,471 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 16:21:54,471 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:21:54,471 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:21:54,471 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:21:54,471 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:21:54,471 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:21:54,471 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:54,471 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:21:54,471 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:21:54,471 INFO L132 ssoRankerPreferences]: Filename of dumped script: fibonacci.wvr.bpl_petrified1_Iteration2_Loop [2025-04-26 16:21:54,471 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:21:54,471 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:21:54,475 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:21:54,480 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:21:54,507 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:21:54,508 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:21:54,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:54,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:54,510 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 16:21:54,512 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 16:21:54,514 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 16:21:54,524 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:21:54,524 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:21:54,524 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:21:54,524 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:21:54,524 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:21:54,525 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:21:54,525 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:21:54,527 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:21:54,529 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:21:54,529 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:21:54,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:21:54,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:21:54,531 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 16:21:54,532 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 16:21:54,533 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:21:54,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2025-04-26 16:21:54,537 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:21:54,537 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:21:54,537 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 16:21:54,544 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 16:21:54,545 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:21:54,558 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:21:54,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:21:54,565 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:21:54,566 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:21:54,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:21:54,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:21:54,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:21:54,577 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:21:54,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:21:54,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:21:54,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:21:54,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:21:54,579 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 16:21:54,579 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 16:21:54,579 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 53 transitions. cyclomatic complexity: 38 Second operand has 2 states, 2 states have (on average 2.5) internal successors, (in total 5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:21:54,596 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 53 transitions. cyclomatic complexity: 38. Second operand has 2 states, 2 states have (on average 2.5) internal successors, (in total 5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 43 states and 95 transitions. Complement of second has 4 states. [2025-04-26 16:21:54,596 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 16:21:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.5) internal successors, (in total 5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:21:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 20 transitions. [2025-04-26 16:21:54,597 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 3 states and 20 transitions. Stem has 4 letters. Loop has 1 letters. [2025-04-26 16:21:54,597 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:21:54,597 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 3 states and 20 transitions. Stem has 5 letters. Loop has 1 letters. [2025-04-26 16:21:54,597 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:21:54,597 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 3 states and 20 transitions. Stem has 4 letters. Loop has 2 letters. [2025-04-26 16:21:54,597 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:21:54,597 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 95 transitions. [2025-04-26 16:21:54,598 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:21:54,598 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 0 states and 0 transitions. [2025-04-26 16:21:54,598 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:21:54,598 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:21:54,598 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:21:54,598 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:21:54,599 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:21:54,599 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:21:54,599 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:21:54,600 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:21:54,600 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:21:54,600 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:21:54,600 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:21:54,606 INFO L201 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:21:54 BoogieIcfgContainer [2025-04-26 16:21:54,606 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:21:54,607 INFO L158 Benchmark]: Toolchain (without parser) took 1528.18ms. Allocated memory was 159.4MB in the beginning and 142.6MB in the end (delta: -16.8MB). Free memory was 86.9MB in the beginning and 78.3MB in the end (delta: 8.5MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:21:54,607 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.21ms. Allocated memory is still 159.4MB. Free memory is still 87.8MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:21:54,608 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.22ms. Allocated memory is still 159.4MB. Free memory was 86.9MB in the beginning and 84.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:21:54,609 INFO L158 Benchmark]: Boogie Preprocessor took 25.17ms. Allocated memory is still 159.4MB. Free memory was 84.9MB in the beginning and 84.1MB in the end (delta: 833.8kB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:21:54,609 INFO L158 Benchmark]: RCFGBuilder took 211.48ms. Allocated memory is still 159.4MB. Free memory was 83.9MB in the beginning and 73.8MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-26 16:21:54,609 INFO L158 Benchmark]: BuchiAutomizer took 1251.92ms. Allocated memory was 159.4MB in the beginning and 142.6MB in the end (delta: -16.8MB). Free memory was 73.6MB in the beginning and 78.3MB in the end (delta: -4.8MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:21:54,610 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 0.21ms. Allocated memory is still 159.4MB. Free memory is still 87.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.22ms. Allocated memory is still 159.4MB. Free memory was 86.9MB in the beginning and 84.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 25.17ms. Allocated memory is still 159.4MB. Free memory was 84.9MB in the beginning and 84.1MB in the end (delta: 833.8kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 211.48ms. Allocated memory is still 159.4MB. Free memory was 83.9MB in the beginning and 73.8MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 1251.92ms. Allocated memory was 159.4MB in the beginning and 142.6MB in the end (delta: -16.8MB). Free memory was 73.6MB in the beginning and 78.3MB in the end (delta: -4.8MB). 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 1.1s 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, 3 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, 33 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29 IncrementalHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 15 mSDtfsCounter, 29 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: 41ms 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: 0.0s InitialAbstraction: - 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 16:21:54,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...