/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -i /storage/cav23-termute-examples/4_plus_thr/pc4.c.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:26:03,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:26:03,834 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2025-04-26 16:26:03,840 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:26:03,840 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:26:03,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:26:03,859 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:26:03,860 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:26:03,860 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:26:03,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:26:03,860 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:26:03,860 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:26:03,860 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:26:03,860 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:26:03,860 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:26:03,861 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:26:03,861 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:26:03,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:26:03,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:26:03,861 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:26:03,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:26:03,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:26:03,862 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:26:03,862 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:26:04,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:26:04,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:26:04,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:26:04,089 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:26:04,090 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:26:04,091 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/cav23-termute-examples/4_plus_thr/pc4.c.bpl [2025-04-26 16:26:04,093 INFO L110 BoogieParser]: Parsing: '/storage/cav23-termute-examples/4_plus_thr/pc4.c.bpl' [2025-04-26 16:26:04,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:26:04,109 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:26:04,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:26:04,110 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:26:04,110 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:26:04,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,145 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:26:04,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:26:04,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:26:04,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:26:04,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:26:04,152 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,156 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,158 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,171 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:26:04,172 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:26:04,172 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:26:04,172 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:26:04,173 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/1) ... [2025-04-26 16:26:04,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:04,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:04,197 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 16:26:04,200 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 16:26:04,220 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-04-26 16:26:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:26:04,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:26:04,220 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-04-26 16:26:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:26:04,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:26:04,220 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2025-04-26 16:26:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-26 16:26:04,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-26 16:26:04,220 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-04-26 16:26:04,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:26:04,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:26:04,220 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2025-04-26 16:26:04,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-04-26 16:26:04,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-04-26 16:26:04,222 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 16:26:04,256 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:26:04,257 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:26:04,345 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:26:04,345 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:26:04,353 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:26:04,354 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-26 16:26:04,356 INFO L201 PluginConnector]: Adding new model pc4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:26:04 BoogieIcfgContainer [2025-04-26 16:26:04,356 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:26:04,357 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:26:04,357 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:26:04,362 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:26:04,363 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:26:04,363 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:26:04" (1/2) ... [2025-04-26 16:26:04,365 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3094fa1c and model type pc4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:26:04, skipping insertion in model container [2025-04-26 16:26:04,365 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:26:04,365 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "pc4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:26:04" (2/2) ... [2025-04-26 16:26:04,366 INFO L376 chiAutomizerObserver]: Analyzing ICFG pc4.c.bpl [2025-04-26 16:26:04,412 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-04-26 16:26:04,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 42 transitions, 112 flow [2025-04-26 16:26:04,465 INFO L116 PetriNetUnfolderBase]: 4/34 cut-off events. [2025-04-26 16:26:04,468 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-26 16:26:04,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 34 events. 4/34 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 90 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2025-04-26 16:26:04,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 42 transitions, 112 flow [2025-04-26 16:26:04,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 34 transitions, 92 flow [2025-04-26 16:26:04,477 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 43 places, 34 transitions, 92 flow [2025-04-26 16:26:04,486 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:26:04,486 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:26:04,486 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:26:04,486 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:26:04,486 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:26:04,487 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:26:04,487 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:26:04,487 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:26:04,488 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2025-04-26 16:26:04,734 INFO L131 ngComponentsAnalysis]: Automaton has 265 accepting balls. 1653 [2025-04-26 16:26:04,735 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:26:04,735 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:26:04,738 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:26:04,739 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:26:04,741 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:26:04,741 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 1815 states, but on-demand construction may add more states [2025-04-26 16:26:04,789 INFO L131 ngComponentsAnalysis]: Automaton has 265 accepting balls. 1653 [2025-04-26 16:26:04,789 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:26:04,789 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:26:04,790 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:26:04,790 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:26:04,795 INFO L752 eck$LassoCheckResult]: Stem: "[75] $Ultimate##0-->L14: Formula: (= v_f_6 0) InVars {f=v_f_6} OutVars{f=v_f_6} AuxVars[] AssignedVars[]" "[111] L14-->L27: Formula: (= v_thread1Thread1of1ForFork1_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork1_thidvar0=v_thread1Thread1of1ForFork1_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork1_thidvar0]" [2025-04-26 16:26:04,797 INFO L754 eck$LassoCheckResult]: Loop: "[83] L27-->L29: Formula: (< v_x1_1 v_z1_1) InVars {x1=v_x1_1, z1=v_z1_1} OutVars{x1=v_x1_1, z1=v_z1_1} AuxVars[] AssignedVars[]" "[85] L29-->L30: Formula: (= v_x1_2 (+ v_x1_3 1)) InVars {x1=v_x1_3} OutVars{x1=v_x1_2} AuxVars[] AssignedVars[x1]" "[87] L30-->L27: Formula: (= (+ v_c_2 1) v_c_1) InVars {c=v_c_2} OutVars{c=v_c_1} AuxVars[] AssignedVars[c]" [2025-04-26 16:26:04,800 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash 3397, now seen corresponding path program 1 times [2025-04-26 16:26:04,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:04,806 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115110346] [2025-04-26 16:26:04,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:04,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:04,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:26:04,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:26:04,866 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:04,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:04,866 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:04,869 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:26:04,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:26:04,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:04,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:04,888 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:04,892 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 112276, now seen corresponding path program 1 times [2025-04-26 16:26:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:04,892 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612904695] [2025-04-26 16:26:04,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:04,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:04,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:04,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:04,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:04,904 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:04,906 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:04,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:04,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:04,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:04,910 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:04,911 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:04,911 INFO L85 PathProgramCache]: Analyzing trace with hash 101282512, now seen corresponding path program 1 times [2025-04-26 16:26:04,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:04,911 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542889142] [2025-04-26 16:26:04,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:04,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:04,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:26:04,922 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:26:04,922 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:04,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:04,923 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:04,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:26:04,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:26:04,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:04,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:04,930 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:04,987 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:04,988 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:04,988 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:04,988 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:04,989 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:26:04,989 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:04,989 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:04,989 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:04,989 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:26:04,989 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:04,989 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:05,000 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:05,012 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:05,060 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:05,060 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:26:05,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:05,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:05,064 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 16:26:05,065 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 16:26:05,067 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:26:05,067 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:05,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:05,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:05,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:05,095 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 16:26:05,096 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 16:26:05,097 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:26:05,097 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:05,132 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:26:05,133 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {c=0} Honda state: {c=0} Generalized eigenvectors: [{c=-3}, {c=-3}, {c=7}] Lambdas: [0, 1, 1] Nus: [1, 0] [2025-04-26 16:26:05,138 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 16:26:05,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:05,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:05,141 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 16:26:05,142 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 16:26:05,143 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:26:05,144 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:05,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:05,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:05,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:05,163 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 16:26:05,164 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 16:26:05,166 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:26:05,166 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:05,249 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:26:05,254 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 16:26:05,255 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:05,255 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:05,255 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:05,255 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:05,255 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:26:05,255 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:05,255 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:05,255 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:05,255 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:26:05,255 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:05,255 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:05,256 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:05,267 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:05,320 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:05,322 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:26:05,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:05,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:05,326 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 16:26:05,328 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 16:26:05,330 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 16:26:05,342 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:26:05,342 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:26:05,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:26:05,344 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:26:05,344 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:26:05,352 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:26:05,352 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:26:05,357 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:26:05,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:05,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:05,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:05,365 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 16:26:05,367 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 16:26:05,368 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 16:26:05,379 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:26:05,379 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:26:05,380 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:26:05,380 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:26:05,380 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:26:05,381 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:26:05,381 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:26:05,383 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:26:05,386 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:26:05,386 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:26:05,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:05,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:05,390 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 16:26:05,392 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 16:26:05,392 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:26:05,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2025-04-26 16:26:05,396 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:26:05,396 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:26:05,397 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z1, x1) = 1*z1 - 1*x1 Supporting invariants [] [2025-04-26 16:26:05,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:05,405 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:26:05,428 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:05,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:26:05,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:26:05,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:05,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:05,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:26:05,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:05,452 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:05,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:05,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:05,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:05,454 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:26:05,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:05,547 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 16:26:05,590 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:26:05,594 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 1815 states, but on-demand construction may add more states Second operand has 4 states, 4 states have (on average 1.25) internal successors, (in total 5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:26:05,781 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 1815 states, but on-demand construction may add more states. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (in total 5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 4406 states and 18422 transitions. Complement of second has 6 states. [2025-04-26 16:26:05,784 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:26:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (in total 5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:26:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2025-04-26 16:26:05,795 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 79 transitions. Stem has 2 letters. Loop has 3 letters. [2025-04-26 16:26:05,796 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:05,796 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 79 transitions. Stem has 5 letters. Loop has 3 letters. [2025-04-26 16:26:05,796 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:05,796 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 79 transitions. Stem has 2 letters. Loop has 6 letters. [2025-04-26 16:26:05,797 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:05,797 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 4406 states and 18422 transitions. [2025-04-26 16:26:05,873 INFO L131 ngComponentsAnalysis]: Automaton has 315 accepting balls. 1533 [2025-04-26 16:26:05,931 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 4406 states to 3205 states and 13661 transitions. [2025-04-26 16:26:05,932 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1723 [2025-04-26 16:26:05,943 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 2218 [2025-04-26 16:26:05,944 INFO L74 IsDeterministic]: Start isDeterministic. Operand 3205 states and 13661 transitions. [2025-04-26 16:26:05,945 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:26:05,945 INFO L218 hiAutomatonCegarLoop]: Abstraction has 3205 states and 13661 transitions. [2025-04-26 16:26:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states and 13661 transitions. [2025-04-26 16:26:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2711. [2025-04-26 16:26:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2711 states have (on average 4.225746956842493) internal successors, (in total 11456), 2710 states have internal predecessors, (11456), 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 16:26:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 11456 transitions. [2025-04-26 16:26:06,125 INFO L240 hiAutomatonCegarLoop]: Abstraction has 2711 states and 11456 transitions. [2025-04-26 16:26:06,125 INFO L438 stractBuchiCegarLoop]: Abstraction has 2711 states and 11456 transitions. [2025-04-26 16:26:06,126 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:26:06,126 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2711 states and 11456 transitions. [2025-04-26 16:26:06,145 INFO L131 ngComponentsAnalysis]: Automaton has 315 accepting balls. 1533 [2025-04-26 16:26:06,146 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:26:06,146 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:26:06,146 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:26:06,146 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:26:06,146 INFO L752 eck$LassoCheckResult]: Stem: "[75] $Ultimate##0-->L14: Formula: (= v_f_6 0) InVars {f=v_f_6} OutVars{f=v_f_6} AuxVars[] AssignedVars[]" "[111] L14-->L27: Formula: (= v_thread1Thread1of1ForFork1_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork1_thidvar0=v_thread1Thread1of1ForFork1_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork1_thidvar0]" "[114] L14-1-->L38: Formula: (and (= 2 v_thread2Thread1of1ForFork2_thidvar1_2) (= 2 v_thread2Thread1of1ForFork2_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork2_thidvar1=v_thread2Thread1of1ForFork2_thidvar1_2, thread2Thread1of1ForFork2_thidvar0=v_thread2Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_thidvar1, thread2Thread1of1ForFork2_thidvar0]" [2025-04-26 16:26:06,147 INFO L754 eck$LassoCheckResult]: Loop: "[89] L38-->L40: Formula: (< v_x2_1 v_z2_1) InVars {z2=v_z2_1, x2=v_x2_1} OutVars{z2=v_z2_1, x2=v_x2_1} AuxVars[] AssignedVars[]" "[91] L40-->L41: Formula: (= v_x2_2 (+ v_x2_3 1)) InVars {x2=v_x2_3} OutVars{x2=v_x2_2} AuxVars[] AssignedVars[x2]" "[93] L41-->L38: Formula: (= (+ v_c_4 1) v_c_3) InVars {c=v_c_4} OutVars{c=v_c_3} AuxVars[] AssignedVars[c]" [2025-04-26 16:26:06,147 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:06,147 INFO L85 PathProgramCache]: Analyzing trace with hash 105421, now seen corresponding path program 1 times [2025-04-26 16:26:06,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:06,147 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356145538] [2025-04-26 16:26:06,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:06,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:06,150 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:06,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:06,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:06,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:06,151 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:06,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:06,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:06,156 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:06,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:06,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:06,157 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash 118234, now seen corresponding path program 1 times [2025-04-26 16:26:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:06,158 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547609941] [2025-04-26 16:26:06,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:06,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:06,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:06,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:06,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:06,161 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:06,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:06,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:06,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:06,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:06,164 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:06,164 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1154281842, now seen corresponding path program 1 times [2025-04-26 16:26:06,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:06,164 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360065962] [2025-04-26 16:26:06,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:06,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:06,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:26:06,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:26:06,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:06,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:06,168 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:06,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:26:06,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:26:06,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:06,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:06,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:06,193 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:06,193 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:06,193 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:06,193 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:06,193 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:26:06,193 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:06,193 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:06,193 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:06,193 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:26:06,193 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:06,194 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:06,194 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:06,200 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:06,225 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:06,225 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:26:06,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:06,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:06,228 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 16:26:06,228 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 16:26:06,230 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:26:06,230 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:06,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2025-04-26 16:26:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:06,247 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 16:26:06,248 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 16:26:06,250 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:26:06,250 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:06,319 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:26:06,324 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 16:26:06,324 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:06,324 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:06,325 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:06,325 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:06,325 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:26:06,325 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:06,325 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:06,325 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:06,325 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:26:06,325 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:06,325 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:06,326 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:06,332 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:06,357 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:06,357 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:26:06,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:06,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:06,360 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 16:26:06,362 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 16:26:06,364 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 16:26:06,374 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:26:06,374 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:26:06,374 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:26:06,374 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:26:06,374 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:26:06,376 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:26:06,376 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:26:06,378 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:26:06,381 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:26:06,381 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:26:06,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:06,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:06,383 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 16:26:06,385 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 16:26:06,386 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:26:06,389 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:26:06,391 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 16:26:06,391 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:26:06,391 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:26:06,391 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z2, x2) = 1*z2 - 1*x2 Supporting invariants [] [2025-04-26 16:26:06,397 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 16:26:06,399 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:26:06,414 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:06,419 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:06,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:06,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:06,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:06,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:26:06,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:06,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:06,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:06,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:06,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:06,428 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:26:06,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:06,461 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 16:26:06,462 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:26:06,462 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 2711 states and 11456 transitions. cyclomatic complexity: 9133 Second operand has 4 states, 4 states have (on average 1.5) internal successors, (in total 6), 4 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 16:26:06,637 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 2711 states and 11456 transitions. cyclomatic complexity: 9133. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (in total 6), 4 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 6972 states and 30803 transitions. Complement of second has 6 states. [2025-04-26 16:26:06,637 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:26:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (in total 6), 4 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 16:26:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2025-04-26 16:26:06,638 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 83 transitions. Stem has 3 letters. Loop has 3 letters. [2025-04-26 16:26:06,638 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:06,638 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 83 transitions. Stem has 6 letters. Loop has 3 letters. [2025-04-26 16:26:06,639 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:06,639 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 83 transitions. Stem has 3 letters. Loop has 6 letters. [2025-04-26 16:26:06,639 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:06,639 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6972 states and 30803 transitions. [2025-04-26 16:26:06,727 INFO L131 ngComponentsAnalysis]: Automaton has 338 accepting balls. 1272 [2025-04-26 16:26:06,845 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6972 states to 5048 states and 22513 transitions. [2025-04-26 16:26:06,845 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1917 [2025-04-26 16:26:06,852 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 2460 [2025-04-26 16:26:06,853 INFO L74 IsDeterministic]: Start isDeterministic. Operand 5048 states and 22513 transitions. [2025-04-26 16:26:06,853 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:26:06,853 INFO L218 hiAutomatonCegarLoop]: Abstraction has 5048 states and 22513 transitions. [2025-04-26 16:26:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5048 states and 22513 transitions. [2025-04-26 16:26:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 4505. [2025-04-26 16:26:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4505 states have (on average 4.480355160932297) internal successors, (in total 20184), 4504 states have internal predecessors, (20184), 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 16:26:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 20184 transitions. [2025-04-26 16:26:07,078 INFO L240 hiAutomatonCegarLoop]: Abstraction has 4505 states and 20184 transitions. [2025-04-26 16:26:07,078 INFO L438 stractBuchiCegarLoop]: Abstraction has 4505 states and 20184 transitions. [2025-04-26 16:26:07,078 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:26:07,079 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 4505 states and 20184 transitions. [2025-04-26 16:26:07,122 INFO L131 ngComponentsAnalysis]: Automaton has 338 accepting balls. 1272 [2025-04-26 16:26:07,123 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:26:07,123 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:26:07,123 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2025-04-26 16:26:07,123 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:26:07,124 INFO L752 eck$LassoCheckResult]: Stem: "[75] $Ultimate##0-->L14: Formula: (= v_f_6 0) InVars {f=v_f_6} OutVars{f=v_f_6} AuxVars[] AssignedVars[]" "[111] L14-->L27: Formula: (= v_thread1Thread1of1ForFork1_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork1_thidvar0=v_thread1Thread1of1ForFork1_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork1_thidvar0]" "[114] L14-1-->L38: Formula: (and (= 2 v_thread2Thread1of1ForFork2_thidvar1_2) (= 2 v_thread2Thread1of1ForFork2_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork2_thidvar1=v_thread2Thread1of1ForFork2_thidvar1_2, thread2Thread1of1ForFork2_thidvar0=v_thread2Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_thidvar1, thread2Thread1of1ForFork2_thidvar0]" "[117] L15-->$Ultimate##0: Formula: (and (= v_thread3Thread1of1ForFork3_thidvar2_2 3) (= v_thread3Thread1of1ForFork3_thidvar1_2 3) (= v_thread3Thread1of1ForFork3_thidvar0_2 3)) InVars {} OutVars{thread3Thread1of1ForFork3_thidvar0=v_thread3Thread1of1ForFork3_thidvar0_2, thread3Thread1of1ForFork3_thidvar2=v_thread3Thread1of1ForFork3_thidvar2_2, thread3Thread1of1ForFork3_thidvar1=v_thread3Thread1of1ForFork3_thidvar1_2} AuxVars[] AssignedVars[thread3Thread1of1ForFork3_thidvar0, thread3Thread1of1ForFork3_thidvar2, thread3Thread1of1ForFork3_thidvar1]" "[94] $Ultimate##0-->L50-1: Formula: (< 1 v_f_5) InVars {f=v_f_5} OutVars{f=v_f_5} AuxVars[] AssignedVars[]" [2025-04-26 16:26:07,124 INFO L754 eck$LassoCheckResult]: Loop: "[96] L50-1-->L52: Formula: (< v_y1_1 v_z1_3) InVars {y1=v_y1_1, z1=v_z1_3} OutVars{y1=v_y1_1, z1=v_z1_3} AuxVars[] AssignedVars[]" "[98] L52-->L53: Formula: (= v_y1_2 (+ v_y1_3 1)) InVars {y1=v_y1_3} OutVars{y1=v_y1_2} AuxVars[] AssignedVars[y1]" "[99] L53-->L50-1: Formula: (= (+ v_c_5 1) v_c_6) InVars {c=v_c_6} OutVars{c=v_c_5} AuxVars[] AssignedVars[c]" [2025-04-26 16:26:07,124 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:07,124 INFO L85 PathProgramCache]: Analyzing trace with hash 101313302, now seen corresponding path program 1 times [2025-04-26 16:26:07,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:07,125 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96561835] [2025-04-26 16:26:07,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:07,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:07,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:26:07,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:26:07,133 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:07,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:07,165 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 16:26:07,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-26 16:26:07,165 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96561835] [2025-04-26 16:26:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96561835] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-26 16:26:07,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-26 16:26:07,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-26 16:26:07,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121701676] [2025-04-26 16:26:07,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-26 16:26:07,170 INFO L757 eck$LassoCheckResult]: stem already infeasible [2025-04-26 16:26:07,170 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:07,170 INFO L85 PathProgramCache]: Analyzing trace with hash 125184, now seen corresponding path program 1 times [2025-04-26 16:26:07,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:07,170 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096254306] [2025-04-26 16:26:07,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:07,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:07,173 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:07,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:07,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:07,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:07,174 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:07,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:07,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:07,176 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:07,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:07,177 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:07,208 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:07,208 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:07,209 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:07,209 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:07,209 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:26:07,209 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:07,209 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:07,209 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:07,209 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:26:07,209 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:07,209 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:07,210 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:07,212 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:07,242 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:07,242 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:26:07,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:07,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:07,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:07,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2025-04-26 16:26:07,247 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:26:07,247 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:07,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2025-04-26 16:26:07,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:07,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:07,266 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:07,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2025-04-26 16:26:07,270 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:26:07,270 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:07,295 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:26:07,295 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {c=0} Honda state: {c=0} Generalized eigenvectors: [{c=0}, {c=7}, {c=-8}] Lambdas: [0, 1, 1] Nus: [0, 0] [2025-04-26 16:26:07,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:07,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:07,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:07,303 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:07,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2025-04-26 16:26:07,307 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:26:07,307 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:07,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:07,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:07,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:07,327 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:07,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2025-04-26 16:26:07,330 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:26:07,330 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:07,396 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:26:07,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2025-04-26 16:26:07,401 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:07,401 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:07,401 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:07,401 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:07,401 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:26:07,401 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:07,401 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:07,401 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:07,401 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:26:07,401 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:07,401 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:07,402 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:07,406 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:07,433 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:07,433 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:26:07,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:07,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:07,435 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:07,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2025-04-26 16:26:07,438 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 16:26:07,448 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:26:07,448 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:26:07,448 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:26:07,448 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:26:07,448 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:26:07,450 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:26:07,450 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:26:07,452 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:26:07,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:07,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:07,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:07,459 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:07,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2025-04-26 16:26:07,461 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 16:26:07,470 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:26:07,470 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:26:07,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:26:07,470 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:26:07,470 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:26:07,471 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:26:07,471 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:26:07,474 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:26:07,481 INFO L436 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-04-26 16:26:07,481 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:26:07,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:07,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:07,483 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:07,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2025-04-26 16:26:07,485 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:26:07,488 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:26:07,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:07,489 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:26:07,489 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:26:07,489 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(y1, z1) = -1*y1 + 1*z1 Supporting invariants [] [2025-04-26 16:26:07,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:07,495 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:26:07,509 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:07,515 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:26:07,519 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:26:07,519 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:07,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:07,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:26:07,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:07,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:07,531 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:07,531 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:07,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:07,531 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:26:07,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:07,565 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 16:26:07,566 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:26:07,566 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 4505 states and 20184 transitions. cyclomatic complexity: 16251 Second operand has 4 states, 4 states have (on average 2.0) internal successors, (in total 8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:26:07,770 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 4505 states and 20184 transitions. cyclomatic complexity: 16251. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (in total 8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 12579 states and 60390 transitions. Complement of second has 6 states. [2025-04-26 16:26:07,771 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:26:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (in total 8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:26:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-04-26 16:26:07,772 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 98 transitions. Stem has 5 letters. Loop has 3 letters. [2025-04-26 16:26:07,772 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:07,772 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 98 transitions. Stem has 8 letters. Loop has 3 letters. [2025-04-26 16:26:07,772 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:07,772 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 98 transitions. Stem has 5 letters. Loop has 6 letters. [2025-04-26 16:26:07,772 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:07,773 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12579 states and 60390 transitions. [2025-04-26 16:26:07,979 INFO L131 ngComponentsAnalysis]: Automaton has 259 accepting balls. 777 [2025-04-26 16:26:08,069 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12579 states to 8195 states and 39366 transitions. [2025-04-26 16:26:08,070 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 2239 [2025-04-26 16:26:08,079 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3070 [2025-04-26 16:26:08,079 INFO L74 IsDeterministic]: Start isDeterministic. Operand 8195 states and 39366 transitions. [2025-04-26 16:26:08,080 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:26:08,080 INFO L218 hiAutomatonCegarLoop]: Abstraction has 8195 states and 39366 transitions. [2025-04-26 16:26:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8195 states and 39366 transitions. [2025-04-26 16:26:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8195 to 7092. [2025-04-26 16:26:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7092 states, 7092 states have (on average 4.936971235194585) internal successors, (in total 35013), 7091 states have internal predecessors, (35013), 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 16:26:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7092 states to 7092 states and 35013 transitions. [2025-04-26 16:26:08,342 INFO L240 hiAutomatonCegarLoop]: Abstraction has 7092 states and 35013 transitions. [2025-04-26 16:26:08,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-26 16:26:08,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-26 16:26:08,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-26 16:26:08,346 INFO L87 Difference]: Start difference. First operand 7092 states and 35013 transitions. Second operand has 3 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 16:26:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-26 16:26:08,399 INFO L93 Difference]: Finished difference Result 2839 states and 12211 transitions. [2025-04-26 16:26:08,399 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 2839 states and 12211 transitions. [2025-04-26 16:26:08,419 INFO L131 ngComponentsAnalysis]: Automaton has 163 accepting balls. 489 [2025-04-26 16:26:08,437 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 2839 states to 2836 states and 12202 transitions. [2025-04-26 16:26:08,437 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1162 [2025-04-26 16:26:08,439 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1162 [2025-04-26 16:26:08,440 INFO L74 IsDeterministic]: Start isDeterministic. Operand 2836 states and 12202 transitions. [2025-04-26 16:26:08,440 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:26:08,440 INFO L218 hiAutomatonCegarLoop]: Abstraction has 2836 states and 12202 transitions. [2025-04-26 16:26:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states and 12202 transitions. [2025-04-26 16:26:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2836. [2025-04-26 16:26:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2836 states have (on average 4.302538787023978) internal successors, (in total 12202), 2835 states have internal predecessors, (12202), 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 16:26:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 12202 transitions. [2025-04-26 16:26:08,555 INFO L240 hiAutomatonCegarLoop]: Abstraction has 2836 states and 12202 transitions. [2025-04-26 16:26:08,555 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-26 16:26:08,556 INFO L438 stractBuchiCegarLoop]: Abstraction has 2836 states and 12202 transitions. [2025-04-26 16:26:08,556 INFO L340 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2025-04-26 16:26:08,556 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2836 states and 12202 transitions. [2025-04-26 16:26:08,571 INFO L131 ngComponentsAnalysis]: Automaton has 163 accepting balls. 489 [2025-04-26 16:26:08,571 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:26:08,571 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:26:08,571 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:26:08,571 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:26:08,572 INFO L752 eck$LassoCheckResult]: Stem: "[75] $Ultimate##0-->L14: Formula: (= v_f_6 0) InVars {f=v_f_6} OutVars{f=v_f_6} AuxVars[] AssignedVars[]" "[111] L14-->L27: Formula: (= v_thread1Thread1of1ForFork1_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork1_thidvar0=v_thread1Thread1of1ForFork1_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork1_thidvar0]" "[82] L27-->L32: Formula: (<= v_z1_2 v_x1_4) InVars {x1=v_x1_4, z1=v_z1_2} OutVars{x1=v_x1_4, z1=v_z1_2} AuxVars[] AssignedVars[]" "[114] L14-1-->L38: Formula: (and (= 2 v_thread2Thread1of1ForFork2_thidvar1_2) (= 2 v_thread2Thread1of1ForFork2_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork2_thidvar1=v_thread2Thread1of1ForFork2_thidvar1_2, thread2Thread1of1ForFork2_thidvar0=v_thread2Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_thidvar1, thread2Thread1of1ForFork2_thidvar0]" "[84] L32-->thread1FINAL: Formula: (= (+ v_f_2 1) v_f_1) InVars {f=v_f_2} OutVars{f=v_f_1} AuxVars[] AssignedVars[f]" "[117] L15-->$Ultimate##0: Formula: (and (= v_thread3Thread1of1ForFork3_thidvar2_2 3) (= v_thread3Thread1of1ForFork3_thidvar1_2 3) (= v_thread3Thread1of1ForFork3_thidvar0_2 3)) InVars {} OutVars{thread3Thread1of1ForFork3_thidvar0=v_thread3Thread1of1ForFork3_thidvar0_2, thread3Thread1of1ForFork3_thidvar2=v_thread3Thread1of1ForFork3_thidvar2_2, thread3Thread1of1ForFork3_thidvar1=v_thread3Thread1of1ForFork3_thidvar1_2} AuxVars[] AssignedVars[thread3Thread1of1ForFork3_thidvar0, thread3Thread1of1ForFork3_thidvar2, thread3Thread1of1ForFork3_thidvar1]" "[108] L16-->$Ultimate##0: Formula: (and (= 4 v_thread4Thread1of1ForFork0_thidvar3_2) (= 4 v_thread4Thread1of1ForFork0_thidvar1_2) (= 4 v_thread4Thread1of1ForFork0_thidvar2_2) (= 4 v_thread4Thread1of1ForFork0_thidvar0_2)) InVars {} OutVars{thread4Thread1of1ForFork0_thidvar3=v_thread4Thread1of1ForFork0_thidvar3_2, thread4Thread1of1ForFork0_thidvar2=v_thread4Thread1of1ForFork0_thidvar2_2, thread4Thread1of1ForFork0_thidvar1=v_thread4Thread1of1ForFork0_thidvar1_2, thread4Thread1of1ForFork0_thidvar0=v_thread4Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread4Thread1of1ForFork0_thidvar3, thread4Thread1of1ForFork0_thidvar2, thread4Thread1of1ForFork0_thidvar1, thread4Thread1of1ForFork0_thidvar0]" "[100] $Ultimate##0-->L61-1: Formula: (< 1 v_f_7) InVars {f=v_f_7} OutVars{f=v_f_7} AuxVars[] AssignedVars[]" [2025-04-26 16:26:08,572 INFO L754 eck$LassoCheckResult]: Loop: "[102] L61-1-->L63: Formula: (< v_y2_1 v_z2_3) InVars {z2=v_z2_3, y2=v_y2_1} OutVars{z2=v_z2_3, y2=v_y2_1} AuxVars[] AssignedVars[]" "[104] L63-->L64: Formula: (= v_y2_2 (+ v_y2_3 1)) InVars {y2=v_y2_3} OutVars{y2=v_y2_2} AuxVars[] AssignedVars[y2]" "[105] L64-->L61-1: Formula: (= v_c_8 (+ v_c_7 1)) InVars {c=v_c_8} OutVars{c=v_c_7} AuxVars[] AssignedVars[c]" [2025-04-26 16:26:08,572 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2056514626, now seen corresponding path program 1 times [2025-04-26 16:26:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:08,573 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265261153] [2025-04-26 16:26:08,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:08,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:26:08,580 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:26:08,581 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:08,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:08,616 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 16:26:08,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-26 16:26:08,617 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265261153] [2025-04-26 16:26:08,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265261153] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-26 16:26:08,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-26 16:26:08,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-26 16:26:08,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092056173] [2025-04-26 16:26:08,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-26 16:26:08,617 INFO L757 eck$LassoCheckResult]: stem already infeasible [2025-04-26 16:26:08,617 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 131142, now seen corresponding path program 1 times [2025-04-26 16:26:08,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:08,617 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016404504] [2025-04-26 16:26:08,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:08,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:08,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:08,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:08,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:08,621 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:08,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:08,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:08,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:08,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:08,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:08,645 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:08,645 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:08,645 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:08,645 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:08,645 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:26:08,645 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,645 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:08,645 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:08,645 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:26:08,645 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:08,645 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:08,646 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:08,649 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:08,669 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:08,670 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:26:08,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,672 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:08,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2025-04-26 16:26:08,676 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:26:08,676 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:08,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:08,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,694 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:08,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2025-04-26 16:26:08,696 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:26:08,697 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:08,720 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:26:08,720 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {c=0} Honda state: {c=0} Generalized eigenvectors: [{c=0}, {c=7}, {c=-8}] Lambdas: [0, 1, 1] Nus: [0, 0] [2025-04-26 16:26:08,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2025-04-26 16:26:08,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,728 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:08,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2025-04-26 16:26:08,731 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:26:08,732 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:08,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:08,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,750 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:08,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2025-04-26 16:26:08,753 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:26:08,753 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:08,821 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:26:08,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:08,824 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:08,825 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:08,825 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:08,825 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:08,825 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:26:08,825 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,825 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:08,825 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:08,825 INFO L132 ssoRankerPreferences]: Filename of dumped script: pc4.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:26:08,825 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:08,825 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:08,825 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:08,829 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:08,848 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:08,849 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:26:08,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,851 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:08,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2025-04-26 16:26:08,853 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 16:26:08,863 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:26:08,863 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:26:08,863 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:26:08,863 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:26:08,864 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:26:08,864 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:26:08,864 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:26:08,866 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:26:08,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:08,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,873 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:08,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2025-04-26 16:26:08,876 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 16:26:08,885 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:26:08,885 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:26:08,885 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:26:08,885 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:26:08,885 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:26:08,886 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:26:08,886 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:26:08,888 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:26:08,891 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:26:08,891 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:26:08,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,893 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:08,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2025-04-26 16:26:08,896 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:26:08,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:08,900 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:26:08,900 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:26:08,900 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(y2, z2) = -1*y2 + 1*z2 Supporting invariants [] [2025-04-26 16:26:08,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:08,907 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:26:08,917 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:08,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:26:08,925 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:26:08,925 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:08,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:08,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:26:08,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:08,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:08,938 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:08,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:08,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:08,938 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:26:08,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:08,970 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 16:26:08,971 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:26:08,971 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 2836 states and 12202 transitions. cyclomatic complexity: 9733 Second operand has 4 states, 4 states have (on average 2.75) internal successors, (in total 11), 4 states have internal predecessors, (11), 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 16:26:09,089 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 2836 states and 12202 transitions. cyclomatic complexity: 9733. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (in total 11), 4 states have internal predecessors, (11), 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 6719 states and 30189 transitions. Complement of second has 6 states. [2025-04-26 16:26:09,090 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:26:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.75) internal successors, (in total 11), 4 states have internal predecessors, (11), 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 16:26:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-04-26 16:26:09,091 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 95 transitions. Stem has 8 letters. Loop has 3 letters. [2025-04-26 16:26:09,091 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:09,091 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 95 transitions. Stem has 11 letters. Loop has 3 letters. [2025-04-26 16:26:09,091 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:09,091 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 95 transitions. Stem has 8 letters. Loop has 6 letters. [2025-04-26 16:26:09,091 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:09,091 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6719 states and 30189 transitions. [2025-04-26 16:26:09,151 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:26:09,151 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6719 states to 0 states and 0 transitions. [2025-04-26 16:26:09,151 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:26:09,151 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:26:09,151 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:26:09,151 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:26:09,151 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:26:09,151 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:26:09,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-26 16:26:09,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-26 16:26:09,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-26 16:26:09,152 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (in total 8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:26:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-26 16:26:09,152 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2025-04-26 16:26:09,152 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2025-04-26 16:26:09,152 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:26:09,152 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2025-04-26 16:26:09,152 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:26:09,152 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:26:09,152 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:26:09,152 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:26:09,153 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:26:09,153 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:26:09,153 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-26 16:26:09,153 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:26:09,153 INFO L340 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2025-04-26 16:26:09,153 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:26:09,153 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:26:09,153 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:26:09,159 INFO L201 PluginConnector]: Adding new model pc4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:26:09 BoogieIcfgContainer [2025-04-26 16:26:09,159 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:26:09,160 INFO L158 Benchmark]: Toolchain (without parser) took 5050.96ms. Allocated memory was 159.4MB in the beginning and 335.5MB in the end (delta: 176.2MB). Free memory was 85.5MB in the beginning and 73.4MB in the end (delta: 12.1MB). Peak memory consumption was 190.7MB. Max. memory is 8.0GB. [2025-04-26 16:26:09,160 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.86ms. Allocated memory is still 159.4MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:26:09,160 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.41ms. Allocated memory is still 159.4MB. Free memory was 85.5MB in the beginning and 83.6MB in the end (delta: 1.9MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-26 16:26:09,160 INFO L158 Benchmark]: Boogie Preprocessor took 23.03ms. Allocated memory is still 159.4MB. Free memory was 83.6MB in the beginning and 82.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:26:09,160 INFO L158 Benchmark]: RCFGBuilder took 184.50ms. Allocated memory is still 159.4MB. Free memory was 82.4MB in the beginning and 73.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-26 16:26:09,161 INFO L158 Benchmark]: BuchiAutomizer took 4802.20ms. Allocated memory was 159.4MB in the beginning and 335.5MB in the end (delta: 176.2MB). Free memory was 73.0MB in the beginning and 73.4MB in the end (delta: -352.6kB). Peak memory consumption was 178.1MB. Max. memory is 8.0GB. [2025-04-26 16:26:09,161 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 159.4MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 37.41ms. Allocated memory is still 159.4MB. Free memory was 85.5MB in the beginning and 83.6MB in the end (delta: 1.9MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.03ms. Allocated memory is still 159.4MB. Free memory was 83.6MB in the beginning and 82.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 184.50ms. Allocated memory is still 159.4MB. Free memory was 82.4MB in the beginning and 73.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 4802.20ms. Allocated memory was 159.4MB in the beginning and 335.5MB in the end (delta: 176.2MB). Free memory was 73.0MB in the beginning and 73.4MB in the end (delta: -352.6kB). Peak memory consumption was 178.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.7s and 5 iterations. TraceHistogramMax:1. Analysis of lassos took 1.5s. Construction of modules took 0.1s. Büchi inclusion checks took 1.1s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.8s AutomataMinimizationTime, 4 MinimizatonAttempts, 2140 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.7s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [4, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 262 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 258 mSDsluCounter, 437 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 230 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 177 IncrementalHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 207 mSDtfsCounter, 177 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf100 lsp70 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf94 smp100 dnf100 smp100 tf111 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 33ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 3 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.0s InitialAbstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 4 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * x1 + z1 and consists of 4 locations. One deterministic module has affine ranking function z2 + -1 * x2 and consists of 4 locations. One deterministic module has affine ranking function -1 * y1 + z1 and consists of 4 locations. One deterministic module has affine ranking function -1 * y2 + z2 and consists of 4 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2025-04-26 16:26:09,183 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...