/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/lock4.c.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:25:52,478 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:25:52,537 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2025-04-26 16:25:52,541 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:25:52,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:25:52,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:25:52,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:25:52,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:25:52,563 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:25:52,563 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:25:52,563 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:25:52,563 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:25:52,564 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:25:52,564 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:25:52,566 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-26 16:25:52,566 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:25:52,566 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:25:52,566 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:25:52,566 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:25:52,566 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:25:52,566 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:25:52,567 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:25:52,567 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:25:52,567 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:25:52,567 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:25:52,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:25:52,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:25:52,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:25:52,793 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:25:52,793 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:25:52,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/cav23-termute-examples/4_plus_thr/lock4.c.bpl [2025-04-26 16:25:52,794 INFO L110 BoogieParser]: Parsing: '/storage/cav23-termute-examples/4_plus_thr/lock4.c.bpl' [2025-04-26 16:25:52,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:25:52,809 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:25:52,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:25:52,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:25:52,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:25:52,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,830 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,836 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:25:52,837 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:25:52,838 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:25:52,838 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:25:52,838 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:25:52,843 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,845 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,848 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,854 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,854 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:25:52,867 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:25:52,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:25:52,867 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:25:52,868 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/1) ... [2025-04-26 16:25:52,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:52,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:52,892 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 16:25:52,896 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 16:25:52,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-04-26 16:25:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:25:52,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:25:52,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-04-26 16:25:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:25:52,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:25:52,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2025-04-26 16:25:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-26 16:25:52,920 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-26 16:25:52,921 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-04-26 16:25:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:25:52,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:25:52,921 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2025-04-26 16:25:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-04-26 16:25:52,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-04-26 16:25:52,922 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 16:25:52,958 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:25:52,960 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:25:53,043 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:25:53,043 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:25:53,059 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:25:53,060 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-26 16:25:53,060 INFO L201 PluginConnector]: Adding new model lock4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:25:53 BoogieIcfgContainer [2025-04-26 16:25:53,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:25:53,061 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:25:53,061 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:25:53,064 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:25:53,065 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:25:53,065 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:25:52" (1/2) ... [2025-04-26 16:25:53,066 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@176bd19 and model type lock4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:25:53, skipping insertion in model container [2025-04-26 16:25:53,066 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:25:53,066 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "lock4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:25:53" (2/2) ... [2025-04-26 16:25:53,067 INFO L376 chiAutomizerObserver]: Analyzing ICFG lock4.c.bpl [2025-04-26 16:25:53,123 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-04-26 16:25:53,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 45 transitions, 118 flow [2025-04-26 16:25:53,168 INFO L116 PetriNetUnfolderBase]: 4/37 cut-off events. [2025-04-26 16:25:53,170 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-26 16:25:53,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 37 events. 4/37 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 104 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-04-26 16:25:53,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 45 transitions, 118 flow [2025-04-26 16:25:53,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 37 transitions, 98 flow [2025-04-26 16:25:53,179 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 46 places, 37 transitions, 98 flow [2025-04-26 16:25:53,187 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:25:53,187 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:25:53,187 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:25:53,187 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:25:53,187 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:25:53,187 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:25:53,187 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:25:53,188 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:25:53,189 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2025-04-26 16:25:53,531 INFO L131 ngComponentsAnalysis]: Automaton has 511 accepting balls. 2775 [2025-04-26 16:25:53,531 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:25:53,532 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:25:53,535 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:25:53,535 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:25:53,536 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:25:53,536 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 3201 states, but on-demand construction may add more states [2025-04-26 16:25:53,583 INFO L131 ngComponentsAnalysis]: Automaton has 511 accepting balls. 2775 [2025-04-26 16:25:53,584 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:25:53,584 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:25:53,585 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:25:53,585 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:25:53,589 INFO L752 eck$LassoCheckResult]: Stem: "[128] $Ultimate##0-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[98] $Ultimate##0-->L29: Formula: (and (= v_l_13 0) (< 0 v_l_14)) InVars {l=v_l_14} OutVars{l=v_l_13} AuxVars[] AssignedVars[l]" [2025-04-26 16:25:53,590 INFO L754 eck$LassoCheckResult]: Loop: "[100] L29-->L31: Formula: (< v_x1_1 v_z_1) InVars {x1=v_x1_1, z=v_z_1} OutVars{x1=v_x1_1, z=v_z_1} AuxVars[] AssignedVars[]" "[102] L31-->L32: Formula: (= v_x1_2 (+ v_x1_3 1)) InVars {x1=v_x1_3} OutVars{x1=v_x1_2} AuxVars[] AssignedVars[x1]" "[104] L32-->L29: Formula: (= v_x2_2 (+ v_x2_1 1)) InVars {x2=v_x2_2} OutVars{x2=v_x2_1} AuxVars[] AssignedVars[x2]" [2025-04-26 16:25:53,594 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:53,594 INFO L85 PathProgramCache]: Analyzing trace with hash 5027, now seen corresponding path program 1 times [2025-04-26 16:25:53,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:25:53,600 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346650688] [2025-04-26 16:25:53,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:25:53,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:25:53,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:25:53,653 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:25:53,653 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:53,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:53,654 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:25:53,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:25:53,659 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:25:53,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:53,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:53,674 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:25:53,676 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash 129157, now seen corresponding path program 1 times [2025-04-26 16:25:53,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:25:53,676 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237126384] [2025-04-26 16:25:53,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:25:53,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:25:53,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:53,691 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:53,691 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:53,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:53,691 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:25:53,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:53,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:53,698 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:53,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:53,699 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:25:53,700 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:53,700 INFO L85 PathProgramCache]: Analyzing trace with hash 149858723, now seen corresponding path program 1 times [2025-04-26 16:25:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:25:53,700 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578944995] [2025-04-26 16:25:53,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:25:53,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:25:53,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:25:53,705 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:25:53,705 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:53,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:53,705 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:25:53,706 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:25:53,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:25:53,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:53,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:53,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:25:53,776 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:25:53,778 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:25:53,778 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:25:53,779 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:25:53,779 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:25:53,779 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:53,779 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:25:53,779 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:25:53,779 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:25:53,779 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:25:53,780 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:25:53,791 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:53,798 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:53,832 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:25:53,832 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:25:53,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:53,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:53,835 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 16:25:53,837 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 16:25:53,838 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:25:53,838 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:53,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2025-04-26 16:25:53,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:53,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:53,859 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 16:25:53,860 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 16:25:53,861 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:25:53,861 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:53,889 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:25:53,889 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {x2=0} Honda state: {x2=0} Generalized eigenvectors: [{x2=-8}, {x2=3}, {x2=4}] Lambdas: [1, 1, 1] Nus: [0, 0] [2025-04-26 16:25:53,894 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 16:25:53,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:53,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:53,896 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 16:25:53,898 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 16:25:53,899 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:25:53,899 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:53,917 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 16:25:53,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:53,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:53,921 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 16:25:53,922 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 16:25:53,923 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:25:53,923 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:53,991 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:25:53,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2025-04-26 16:25:53,996 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:25:53,996 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:25:53,996 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:25:53,996 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:25:53,996 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:25:53,996 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:53,997 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:25:53,997 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:25:53,997 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:25:53,997 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:25:53,997 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:25:53,998 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:54,003 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:54,036 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:25:54,039 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:25:54,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:54,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:54,042 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 16:25:54,044 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 16:25:54,045 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 16:25:54,056 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:25:54,057 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:25:54,057 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:25:54,058 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:25:54,058 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:25:54,063 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:25:54,063 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:25:54,065 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:25:54,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2025-04-26 16:25:54,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:54,072 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 16:25:54,073 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 16:25:54,074 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 16:25:54,084 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:25:54,084 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:25:54,084 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:25:54,085 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:25:54,085 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:25:54,085 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:25:54,085 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:25:54,088 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:25:54,091 INFO L436 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-04-26 16:25:54,091 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:25:54,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:54,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:54,094 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 16:25:54,096 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 16:25:54,097 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:25:54,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2025-04-26 16:25:54,100 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:25:54,101 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:25:54,101 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(x1, z) = -1*x1 + 1*z Supporting invariants [] [2025-04-26 16:25:54,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2025-04-26 16:25:54,109 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:25:54,132 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:54,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:25:54,143 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:25:54,143 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:54,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:25:54,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:25:54,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:25:54,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:54,157 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:54,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:54,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:25:54,157 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:25:54,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:25:54,256 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 16:25:54,281 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 16:25:54,283 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 3201 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 16:25:54,614 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 3201 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 10604 states and 45332 transitions. Complement of second has 7 states. [2025-04-26 16:25:54,616 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 16:25:54,621 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 16:25:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2025-04-26 16:25:54,628 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 109 transitions. Stem has 2 letters. Loop has 3 letters. [2025-04-26 16:25:54,629 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:25:54,629 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 109 transitions. Stem has 5 letters. Loop has 3 letters. [2025-04-26 16:25:54,630 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:25:54,630 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 109 transitions. Stem has 2 letters. Loop has 6 letters. [2025-04-26 16:25:54,630 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:25:54,630 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10604 states and 45332 transitions. [2025-04-26 16:25:54,833 INFO L131 ngComponentsAnalysis]: Automaton has 896 accepting balls. 4068 [2025-04-26 16:25:54,988 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10604 states to 8408 states and 36274 transitions. [2025-04-26 16:25:54,989 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5328 [2025-04-26 16:25:55,011 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6917 [2025-04-26 16:25:55,012 INFO L74 IsDeterministic]: Start isDeterministic. Operand 8408 states and 36274 transitions. [2025-04-26 16:25:55,013 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:25:55,013 INFO L218 hiAutomatonCegarLoop]: Abstraction has 8408 states and 36274 transitions. [2025-04-26 16:25:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8408 states and 36274 transitions. [2025-04-26 16:25:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8408 to 5717. [2025-04-26 16:25:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5717 states, 5717 states have (on average 4.495539618681127) internal successors, (in total 25701), 5716 states have internal predecessors, (25701), 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 16:25:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 25701 transitions. [2025-04-26 16:25:55,289 INFO L240 hiAutomatonCegarLoop]: Abstraction has 5717 states and 25701 transitions. [2025-04-26 16:25:55,289 INFO L438 stractBuchiCegarLoop]: Abstraction has 5717 states and 25701 transitions. [2025-04-26 16:25:55,290 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:25:55,290 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5717 states and 25701 transitions. [2025-04-26 16:25:55,420 INFO L131 ngComponentsAnalysis]: Automaton has 674 accepting balls. 3258 [2025-04-26 16:25:55,420 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:25:55,421 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:25:55,421 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:25:55,421 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:25:55,426 INFO L752 eck$LassoCheckResult]: Stem: "[128] $Ultimate##0-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[131] L11-->$Ultimate##0: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" "[105] $Ultimate##0-->L45: Formula: (and (= v_l_17 0) (< 0 v_l_18)) InVars {l=v_l_18} OutVars{l=v_l_17} AuxVars[] AssignedVars[l]" [2025-04-26 16:25:55,426 INFO L754 eck$LassoCheckResult]: Loop: "[107] L45-->L47: Formula: (< v_x2_3 v_z_3) InVars {x2=v_x2_3, z=v_z_3} OutVars{x2=v_x2_3, z=v_z_3} AuxVars[] AssignedVars[]" "[109] L47-->L48: Formula: (= (+ v_x2_5 1) v_x2_4) InVars {x2=v_x2_5} OutVars{x2=v_x2_4} AuxVars[] AssignedVars[x2]" "[111] L48-->L45: Formula: (= v_x3_2 (+ v_x3_1 1)) InVars {x3=v_x3_2} OutVars{x3=v_x3_1} AuxVars[] AssignedVars[x3]" [2025-04-26 16:25:55,427 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash 156965, now seen corresponding path program 1 times [2025-04-26 16:25:55,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:25:55,427 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769150041] [2025-04-26 16:25:55,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:25:55,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:25:55,435 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:55,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:55,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:55,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:55,436 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:25:55,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:55,441 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:55,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:55,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:55,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:25:55,446 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash 136108, now seen corresponding path program 1 times [2025-04-26 16:25:55,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:25:55,446 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005311091] [2025-04-26 16:25:55,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:25:55,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:25:55,449 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:55,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:55,471 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:55,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:55,471 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:25:55,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:55,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:55,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:55,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:55,481 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:25:55,481 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:55,481 INFO L85 PathProgramCache]: Analyzing trace with hash 381283336, now seen corresponding path program 1 times [2025-04-26 16:25:55,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:25:55,481 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518079064] [2025-04-26 16:25:55,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:25:55,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:25:55,484 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:25:55,485 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:25:55,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:55,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:55,486 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:25:55,487 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:25:55,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:25:55,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:55,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:55,489 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:25:55,508 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:25:55,512 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:25:55,512 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:25:55,512 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:25:55,512 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:25:55,512 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:55,512 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:25:55,512 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:25:55,512 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:25:55,512 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:25:55,512 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:25:55,513 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:55,526 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:55,557 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:25:55,558 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:25:55,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:55,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:55,561 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 16:25:55,562 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 16:25:55,563 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:25:55,563 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:55,582 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 16:25:55,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:55,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:55,585 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 16:25:55,594 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:25:55,594 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:55,599 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 16:25:55,623 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:25:55,623 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {x3=0} Honda state: {x3=0} Generalized eigenvectors: [{x3=-1}, {x3=1}, {x3=-1}] Lambdas: [2, 2, 1] Nus: [1, 1] [2025-04-26 16:25:55,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2025-04-26 16:25:55,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:55,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:55,632 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 16:25:55,635 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 16:25:55,635 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:25:55,636 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:55,657 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 16:25:55,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:55,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:55,659 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 16:25:55,661 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 16:25:55,662 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:25:55,662 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:55,727 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:25:55,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2025-04-26 16:25:55,731 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:25:55,731 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:25:55,731 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:25:55,731 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:25:55,731 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:25:55,731 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:55,731 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:25:55,731 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:25:55,731 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:25:55,731 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:25:55,731 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:25:55,732 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:55,736 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:55,763 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:25:55,764 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:25:55,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:55,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:55,765 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 16:25:55,767 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 16:25:55,769 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 16:25:55,779 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:25:55,779 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:25:55,779 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:25:55,780 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:25:55,780 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:25:55,780 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:25:55,780 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:25:55,782 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:25:55,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2025-04-26 16:25:55,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:55,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:55,791 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 16:25:55,792 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 16:25:55,794 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 16:25:55,805 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:25:55,805 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:25:55,805 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:25:55,805 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:25:55,805 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:25:55,806 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:25:55,806 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:25:55,810 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:25:55,814 INFO L436 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-04-26 16:25:55,814 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:25:55,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:55,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:55,816 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 16:25:55,818 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 16:25:55,819 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:25:55,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2025-04-26 16:25:55,822 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:25:55,822 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:25:55,822 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(x2, z) = -1*x2 + 1*z Supporting invariants [] [2025-04-26 16:25:55,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2025-04-26 16:25:55,829 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:25:55,842 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:55,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:55,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:55,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:55,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:25:55,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:25:55,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:25:55,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:55,860 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:55,860 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:55,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:25:55,860 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:25:55,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:25:55,895 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 16:25:55,896 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 16:25:55,896 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 5717 states and 25701 transitions. cyclomatic complexity: 20837 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 16:25:56,234 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 5717 states and 25701 transitions. cyclomatic complexity: 20837. 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 21087 states and 96384 transitions. Complement of second has 7 states. [2025-04-26 16:25:56,235 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 16:25:56,236 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 16:25:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2025-04-26 16:25:56,236 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 107 transitions. Stem has 3 letters. Loop has 3 letters. [2025-04-26 16:25:56,236 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:25:56,236 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 107 transitions. Stem has 6 letters. Loop has 3 letters. [2025-04-26 16:25:56,236 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:25:56,236 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 107 transitions. Stem has 3 letters. Loop has 6 letters. [2025-04-26 16:25:56,236 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:25:56,236 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21087 states and 96384 transitions. [2025-04-26 16:25:56,595 INFO L131 ngComponentsAnalysis]: Automaton has 1205 accepting balls. 5049 [2025-04-26 16:25:56,939 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21087 states to 17428 states and 80112 transitions. [2025-04-26 16:25:56,940 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7729 [2025-04-26 16:25:56,979 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9986 [2025-04-26 16:25:56,979 INFO L74 IsDeterministic]: Start isDeterministic. Operand 17428 states and 80112 transitions. [2025-04-26 16:25:56,979 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:25:56,979 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17428 states and 80112 transitions. [2025-04-26 16:25:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17428 states and 80112 transitions. [2025-04-26 16:25:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17428 to 12465. [2025-04-26 16:25:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12465 states, 12465 states have (on average 4.8267148014440435) internal successors, (in total 60165), 12464 states have internal predecessors, (60165), 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 16:25:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12465 states to 12465 states and 60165 transitions. [2025-04-26 16:25:57,465 INFO L240 hiAutomatonCegarLoop]: Abstraction has 12465 states and 60165 transitions. [2025-04-26 16:25:57,465 INFO L438 stractBuchiCegarLoop]: Abstraction has 12465 states and 60165 transitions. [2025-04-26 16:25:57,465 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:25:57,465 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12465 states and 60165 transitions. [2025-04-26 16:25:57,537 INFO L131 ngComponentsAnalysis]: Automaton has 934 accepting balls. 4104 [2025-04-26 16:25:57,537 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:25:57,537 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:25:57,537 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2025-04-26 16:25:57,537 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:25:57,538 INFO L752 eck$LassoCheckResult]: Stem: "[128] $Ultimate##0-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[131] L11-->$Ultimate##0: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" "[134] L12-->$Ultimate##0: Formula: (and (= 3 v_thread3Thread1of1ForFork2_thidvar0_2) (= 3 v_thread3Thread1of1ForFork2_thidvar1_2) (= 3 v_thread3Thread1of1ForFork2_thidvar2_2)) InVars {} OutVars{thread3Thread1of1ForFork2_thidvar2=v_thread3Thread1of1ForFork2_thidvar2_2, thread3Thread1of1ForFork2_thidvar1=v_thread3Thread1of1ForFork2_thidvar1_2, thread3Thread1of1ForFork2_thidvar0=v_thread3Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread3Thread1of1ForFork2_thidvar2, thread3Thread1of1ForFork2_thidvar1, thread3Thread1of1ForFork2_thidvar0]" "[112] $Ultimate##0-->L61: Formula: (and (= v_l_21 0) (< 0 v_l_22)) InVars {l=v_l_22} OutVars{l=v_l_21} AuxVars[] AssignedVars[l]" [2025-04-26 16:25:57,538 INFO L754 eck$LassoCheckResult]: Loop: "[114] L61-->L63: Formula: (< v_x3_4 v_z_6) InVars {x3=v_x3_4, z=v_z_6} OutVars{x3=v_x3_4, z=v_z_6} AuxVars[] AssignedVars[]" "[116] L63-->L64: Formula: (= (+ v_x3_6 1) v_x3_5) InVars {x3=v_x3_6} OutVars{x3=v_x3_5} AuxVars[] AssignedVars[x3]" "[118] L64-->L61: Formula: (= v_x4_2 (+ v_x4_1 1)) InVars {x4=v_x4_2} OutVars{x4=v_x4_1} AuxVars[] AssignedVars[x4]" [2025-04-26 16:25:57,538 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:57,539 INFO L85 PathProgramCache]: Analyzing trace with hash 4866926, now seen corresponding path program 1 times [2025-04-26 16:25:57,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:25:57,539 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357742562] [2025-04-26 16:25:57,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:25:57,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:25:57,541 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:25:57,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:25:57,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:57,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:57,543 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:25:57,543 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:25:57,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:25:57,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:57,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:57,545 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:25:57,545 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:57,546 INFO L85 PathProgramCache]: Analyzing trace with hash 143059, now seen corresponding path program 1 times [2025-04-26 16:25:57,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:25:57,546 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319842552] [2025-04-26 16:25:57,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:25:57,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:25:57,547 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:57,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:57,548 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:57,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:57,548 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:25:57,549 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:57,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:57,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:57,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:57,550 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:25:57,551 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:57,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1038182330, now seen corresponding path program 1 times [2025-04-26 16:25:57,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:25:57,551 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781590486] [2025-04-26 16:25:57,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:25:57,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:25:57,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-26 16:25:57,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-26 16:25:57,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:57,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:57,554 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:25:57,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-26 16:25:57,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-26 16:25:57,557 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:57,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:25:57,558 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:25:57,579 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:25:57,579 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:25:57,579 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:25:57,579 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:25:57,579 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:25:57,579 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:57,579 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:25:57,579 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:25:57,579 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:25:57,579 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:25:57,580 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:25:57,580 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:57,583 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:57,609 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:25:57,609 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:25:57,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:57,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:57,612 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 16:25:57,675 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 16:25:57,679 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:25:57,679 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:57,704 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 16:25:57,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:57,709 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 16:25:57,714 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 16:25:57,715 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:25:57,715 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:57,751 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:25:57,751 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {x4=0} Honda state: {x4=0} Generalized eigenvectors: [{x4=-5}, {x4=-3}, {x4=7}] Lambdas: [1, 1, 1] Nus: [0, 0] [2025-04-26 16:25:57,757 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 16:25:57,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:57,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:57,760 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 16:25:57,760 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 16:25:57,763 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:25:57,763 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:57,780 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 16:25:57,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:57,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:57,783 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 16:25:57,783 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 16:25:57,785 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:25:57,785 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:25:57,888 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:25:57,894 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 16:25:57,895 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:25:57,895 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:25:57,895 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:25:57,895 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:25:57,895 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:25:57,895 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:57,895 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:25:57,895 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:25:57,895 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:25:57,895 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:25:57,895 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:25:57,896 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:57,903 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:25:57,943 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:25:57,943 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:25:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:57,947 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 16:25:57,955 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 16:25:57,960 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 16:25:57,972 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:25:57,973 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:25:57,973 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:25:57,973 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:25:57,973 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:25:57,974 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:25:57,974 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:25:57,986 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:25:58,000 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 16:25:58,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:58,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:58,004 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 16:25:58,005 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 16:25:58,006 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 16:25:58,016 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:25:58,017 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:25:58,017 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:25:58,017 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:25:58,017 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:25:58,018 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:25:58,018 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:25:58,021 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:25:58,025 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:25:58,025 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:25:58,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:25:58,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:25:58,027 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 16:25:58,029 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 16:25:58,030 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:25:58,033 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 16:25:58,034 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:25:58,034 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:25:58,034 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(x3, z) = -1*x3 + 1*z Supporting invariants [] [2025-04-26 16:25:58,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2025-04-26 16:25:58,041 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:25:58,055 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:25:58,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:25:58,061 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:25:58,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:58,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:25:58,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:25:58,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:25:58,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:25:58,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:25:58,070 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:25:58,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:25:58,070 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:25:58,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:25:58,117 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 16:25:58,117 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 16:25:58,118 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12465 states and 60165 transitions. cyclomatic complexity: 49368 Second operand has 4 states, 4 states have (on average 1.75) internal successors, (in total 7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:25:58,644 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12465 states and 60165 transitions. cyclomatic complexity: 49368. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (in total 7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 47395 states and 228064 transitions. Complement of second has 7 states. [2025-04-26 16:25:58,645 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 16:25:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (in total 7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:25:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2025-04-26 16:25:58,646 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 107 transitions. Stem has 4 letters. Loop has 3 letters. [2025-04-26 16:25:58,646 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:25:58,646 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 107 transitions. Stem has 7 letters. Loop has 3 letters. [2025-04-26 16:25:58,646 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:25:58,646 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 107 transitions. Stem has 4 letters. Loop has 6 letters. [2025-04-26 16:25:58,646 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:25:58,646 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47395 states and 228064 transitions. [2025-04-26 16:25:59,550 INFO L131 ngComponentsAnalysis]: Automaton has 1361 accepting balls. 5547 [2025-04-26 16:26:00,097 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47395 states to 37611 states and 181426 transitions. [2025-04-26 16:26:00,097 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11801 [2025-04-26 16:26:00,149 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14792 [2025-04-26 16:26:00,150 INFO L74 IsDeterministic]: Start isDeterministic. Operand 37611 states and 181426 transitions. [2025-04-26 16:26:00,150 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:26:00,150 INFO L218 hiAutomatonCegarLoop]: Abstraction has 37611 states and 181426 transitions. [2025-04-26 16:26:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37611 states and 181426 transitions. [2025-04-26 16:26:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37611 to 27928. [2025-04-26 16:26:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27928 states, 27928 states have (on average 5.021591234603266) internal successors, (in total 140243), 27927 states have internal predecessors, (140243), 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 16:26:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27928 states to 27928 states and 140243 transitions. [2025-04-26 16:26:01,184 INFO L240 hiAutomatonCegarLoop]: Abstraction has 27928 states and 140243 transitions. [2025-04-26 16:26:01,184 INFO L438 stractBuchiCegarLoop]: Abstraction has 27928 states and 140243 transitions. [2025-04-26 16:26:01,184 INFO L340 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2025-04-26 16:26:01,185 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27928 states and 140243 transitions. [2025-04-26 16:26:01,477 INFO L131 ngComponentsAnalysis]: Automaton has 1132 accepting balls. 4752 [2025-04-26 16:26:01,477 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:26:01,477 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:26:01,478 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2025-04-26 16:26:01,478 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:26:01,479 INFO L752 eck$LassoCheckResult]: Stem: "[128] $Ultimate##0-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[131] L11-->$Ultimate##0: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" "[134] L12-->$Ultimate##0: Formula: (and (= 3 v_thread3Thread1of1ForFork2_thidvar0_2) (= 3 v_thread3Thread1of1ForFork2_thidvar1_2) (= 3 v_thread3Thread1of1ForFork2_thidvar2_2)) InVars {} OutVars{thread3Thread1of1ForFork2_thidvar2=v_thread3Thread1of1ForFork2_thidvar2_2, thread3Thread1of1ForFork2_thidvar1=v_thread3Thread1of1ForFork2_thidvar1_2, thread3Thread1of1ForFork2_thidvar0=v_thread3Thread1of1ForFork2_thidvar0_2} AuxVars[] AssignedVars[thread3Thread1of1ForFork2_thidvar2, thread3Thread1of1ForFork2_thidvar1, thread3Thread1of1ForFork2_thidvar0]" "[137] L13-->$Ultimate##0: Formula: (and (= v_thread4Thread1of1ForFork3_thidvar2_2 4) (= v_thread4Thread1of1ForFork3_thidvar3_2 4) (= v_thread4Thread1of1ForFork3_thidvar0_2 4) (= v_thread4Thread1of1ForFork3_thidvar1_2 4)) InVars {} OutVars{thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_2, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_2, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_2, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_2} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_thidvar1, thread4Thread1of1ForFork3_thidvar0, thread4Thread1of1ForFork3_thidvar3, thread4Thread1of1ForFork3_thidvar2]" "[119] $Ultimate##0-->L77: Formula: (and (< 0 v_l_26) (= v_l_25 0)) InVars {l=v_l_26} OutVars{l=v_l_25} AuxVars[] AssignedVars[l]" [2025-04-26 16:26:01,479 INFO L754 eck$LassoCheckResult]: Loop: "[121] L77-->L79: Formula: (< v_x4_3 v_z_7) InVars {x4=v_x4_3, z=v_z_7} OutVars{x4=v_x4_3, z=v_z_7} AuxVars[] AssignedVars[]" "[123] L79-->L80: Formula: (= v_x4_4 (+ v_x4_5 1)) InVars {x4=v_x4_5} OutVars{x4=v_x4_4} AuxVars[] AssignedVars[x4]" "[125] L80-->L77: Formula: (= v_x1_6 (+ v_x1_5 1)) InVars {x1=v_x1_6} OutVars{x1=v_x1_5} AuxVars[] AssignedVars[x1]" [2025-04-26 16:26:01,480 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:01,480 INFO L85 PathProgramCache]: Analyzing trace with hash 150875600, now seen corresponding path program 1 times [2025-04-26 16:26:01,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:01,480 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103676653] [2025-04-26 16:26:01,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:01,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:01,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:26:01,489 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:26:01,489 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:01,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:01,490 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:01,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:26:01,499 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:26:01,499 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:01,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:01,500 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:01,505 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash 150010, now seen corresponding path program 1 times [2025-04-26 16:26:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:01,505 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640130015] [2025-04-26 16:26:01,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:01,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:01,507 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:01,508 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:01,508 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:01,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:01,509 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:01,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:01,516 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:01,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:01,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:01,517 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:01,518 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2095639093, now seen corresponding path program 1 times [2025-04-26 16:26:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:01,518 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44745719] [2025-04-26 16:26:01,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:01,526 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:26:01,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:26:01,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:01,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:01,535 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:01,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:26:01,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:26:01,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:01,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:01,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:01,596 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:01,596 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:01,596 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:01,596 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:01,596 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:26:01,596 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:01,596 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:01,596 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:01,596 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:26:01,596 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:01,596 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:01,597 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:01,606 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:01,627 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:01,627 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:26:01,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:01,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:01,631 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 16:26:01,632 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 16:26:01,634 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:26:01,635 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:01,653 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 16:26:01,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:01,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:01,657 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 16:26:01,662 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 16:26:01,663 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:26:01,663 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:01,733 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:26:01,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2025-04-26 16:26:01,739 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:01,739 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:01,739 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:01,739 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:01,739 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:26:01,739 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:01,739 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:01,739 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:01,739 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:26:01,739 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:01,739 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:01,740 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:01,752 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:01,789 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:01,789 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:26:01,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:01,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:01,792 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 16:26:01,793 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 16:26:01,794 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 16:26:01,804 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:26:01,804 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:26:01,804 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:26:01,804 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:26:01,804 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:26:01,807 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:26:01,807 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:26:01,814 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:26:01,820 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:26:01,820 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:26:01,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:01,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:01,822 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 16:26:01,824 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 16:26:01,825 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:26:01,829 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 16:26:01,829 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:26:01,829 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:26:01,829 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z, x4) = 1*z - 1*x4 Supporting invariants [] [2025-04-26 16:26:01,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2025-04-26 16:26:01,837 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:26:01,859 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:01,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:26:01,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:26:01,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:01,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:01,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:26:01,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:01,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:01,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:01,886 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:01,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:01,886 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:26:01,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:01,918 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 16:26:01,919 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 16:26:01,919 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27928 states and 140243 transitions. cyclomatic complexity: 115626 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 16:26:03,056 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27928 states and 140243 transitions. cyclomatic complexity: 115626. 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 98927 states and 482572 transitions. Complement of second has 7 states. [2025-04-26 16:26:03,057 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 16:26:03,057 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 16:26:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2025-04-26 16:26:03,058 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 107 transitions. Stem has 5 letters. Loop has 3 letters. [2025-04-26 16:26:03,058 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:03,058 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 107 transitions. Stem has 8 letters. Loop has 3 letters. [2025-04-26 16:26:03,058 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:03,058 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 107 transitions. Stem has 5 letters. Loop has 6 letters. [2025-04-26 16:26:03,058 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:03,058 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 98927 states and 482572 transitions. [2025-04-26 16:26:04,882 INFO L131 ngComponentsAnalysis]: Automaton has 1645 accepting balls. 6453 [2025-04-26 16:26:05,830 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 98927 states to 78749 states and 384260 transitions. [2025-04-26 16:26:05,830 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18211 [2025-04-26 16:26:05,904 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21258 [2025-04-26 16:26:05,904 INFO L74 IsDeterministic]: Start isDeterministic. Operand 78749 states and 384260 transitions. [2025-04-26 16:26:05,905 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:26:05,905 INFO L218 hiAutomatonCegarLoop]: Abstraction has 78749 states and 384260 transitions. [2025-04-26 16:26:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78749 states and 384260 transitions. [2025-04-26 16:26:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78749 to 61239. [2025-04-26 16:26:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61239 states, 61239 states have (on average 5.037263835137739) internal successors, (in total 308477), 61238 states have internal predecessors, (308477), 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 16:26:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61239 states to 61239 states and 308477 transitions. [2025-04-26 16:26:08,158 INFO L240 hiAutomatonCegarLoop]: Abstraction has 61239 states and 308477 transitions. [2025-04-26 16:26:08,158 INFO L438 stractBuchiCegarLoop]: Abstraction has 61239 states and 308477 transitions. [2025-04-26 16:26:08,158 INFO L340 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2025-04-26 16:26:08,158 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 61239 states and 308477 transitions. [2025-04-26 16:26:08,740 INFO L131 ngComponentsAnalysis]: Automaton has 1375 accepting balls. 5535 [2025-04-26 16:26:08,740 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:26:08,740 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:26:08,741 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:26:08,741 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:26:08,742 INFO L752 eck$LassoCheckResult]: Stem: "[128] $Ultimate##0-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[98] $Ultimate##0-->L29: Formula: (and (= v_l_13 0) (< 0 v_l_14)) InVars {l=v_l_14} OutVars{l=v_l_13} AuxVars[] AssignedVars[l]" "[131] L11-->$Ultimate##0: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" "[100] L29-->L31: Formula: (< v_x1_1 v_z_1) InVars {x1=v_x1_1, z=v_z_1} OutVars{x1=v_x1_1, z=v_z_1} AuxVars[] AssignedVars[]" "[102] L31-->L32: Formula: (= v_x1_2 (+ v_x1_3 1)) InVars {x1=v_x1_3} OutVars{x1=v_x1_2} AuxVars[] AssignedVars[x1]" "[105] $Ultimate##0-->L45: Formula: (and (= v_l_17 0) (< 0 v_l_18)) InVars {l=v_l_18} OutVars{l=v_l_17} AuxVars[] AssignedVars[l]" "[104] L32-->L29: Formula: (= v_x2_2 (+ v_x2_1 1)) InVars {x2=v_x2_2} OutVars{x2=v_x2_1} AuxVars[] AssignedVars[x2]" [2025-04-26 16:26:08,742 INFO L754 eck$LassoCheckResult]: Loop: "[107] L45-->L47: Formula: (< v_x2_3 v_z_3) InVars {x2=v_x2_3, z=v_z_3} OutVars{x2=v_x2_3, z=v_z_3} AuxVars[] AssignedVars[]" "[109] L47-->L48: Formula: (= (+ v_x2_5 1) v_x2_4) InVars {x2=v_x2_5} OutVars{x2=v_x2_4} AuxVars[] AssignedVars[x2]" "[111] L48-->L45: Formula: (= v_x3_2 (+ v_x3_1 1)) InVars {x3=v_x3_2} OutVars{x3=v_x3_1} AuxVars[] AssignedVars[x3]" [2025-04-26 16:26:08,742 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:08,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1986084255, now seen corresponding path program 1 times [2025-04-26 16:26:08,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:08,742 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370125298] [2025-04-26 16:26:08,742 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:26:08,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:08,745 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-26 16:26:08,749 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-26 16:26:08,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:08,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:08,779 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 16:26:08,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-26 16:26:08,780 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370125298] [2025-04-26 16:26:08,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370125298] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-26 16:26:08,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-26 16:26:08,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-26 16:26:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456430058] [2025-04-26 16:26:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-26 16:26:08,785 INFO L757 eck$LassoCheckResult]: stem already infeasible [2025-04-26 16:26:08,785 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:08,785 INFO L85 PathProgramCache]: Analyzing trace with hash 136108, now seen corresponding path program 2 times [2025-04-26 16:26:08,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:26:08,785 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84485576] [2025-04-26 16:26:08,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-26 16:26:08,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:26:08,788 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:08,789 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:08,789 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-26 16:26:08,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:08,790 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:26:08,792 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:08,794 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:08,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:08,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:26:08,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:26:08,813 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:08,813 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:08,813 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:08,813 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:08,813 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:26:08,813 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,813 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:08,813 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:08,813 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration5_Loop [2025-04-26 16:26:08,813 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:08,813 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:08,814 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:08,818 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:08,835 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:08,835 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:26:08,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,837 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:26:08,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2025-04-26 16:26:08,839 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:26:08,839 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:08,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2025-04-26 16:26:08,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,856 INFO L229 MonitoredProcess]: Starting monitored process 28 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 16:26:08,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2025-04-26 16:26:08,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:26:08,857 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:26:08,917 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:26:08,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2025-04-26 16:26:08,921 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:26:08,921 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:26:08,921 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:26:08,921 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:26:08,921 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:26:08,921 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,921 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:26:08,921 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:26:08,921 INFO L132 ssoRankerPreferences]: Filename of dumped script: lock4.c.bpl_petrified1_Iteration5_Loop [2025-04-26 16:26:08,921 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:26:08,921 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:26:08,922 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:08,926 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:26:08,941 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:26:08,941 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:26:08,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,943 INFO L229 MonitoredProcess]: Starting monitored process 29 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 16:26:08,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2025-04-26 16:26:08,946 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 16:26:08,956 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:26:08,956 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:26:08,956 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:26:08,956 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:26:08,956 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:26:08,957 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:26:08,957 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:26:08,958 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:26:08,961 INFO L436 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-04-26 16:26:08,961 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:26:08,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:26:08,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:26:08,963 INFO L229 MonitoredProcess]: Starting monitored process 30 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 16:26:08,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2025-04-26 16:26:08,964 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:26:08,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2025-04-26 16:26:08,967 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:26:08,967 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:26:08,967 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z, x2) = 1*z - 1*x2 Supporting invariants [] [2025-04-26 16:26:08,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2025-04-26 16:26:08,973 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:26:08,984 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:26:08,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-26 16:26:08,990 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-26 16:26:08,990 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:08,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:08,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:26:08,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:08,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:26:09,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:26:09,001 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:26:09,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:26:09,002 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:26:09,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:26:09,024 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 16:26:09,024 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 16:26:09,025 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61239 states and 308477 transitions. cyclomatic complexity: 253436 Second operand has 4 states, 4 states have (on average 2.5) internal successors, (in total 10), 4 states have internal predecessors, (10), 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 16:26:12,090 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 61239 states and 308477 transitions. cyclomatic complexity: 253436. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (in total 10), 4 states have internal predecessors, (10), 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 261560 states and 1297940 transitions. Complement of second has 7 states. [2025-04-26 16:26:12,092 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 16:26:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.5) internal successors, (in total 10), 4 states have internal predecessors, (10), 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 16:26:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2025-04-26 16:26:12,093 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 120 transitions. Stem has 7 letters. Loop has 3 letters. [2025-04-26 16:26:12,093 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:12,093 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 120 transitions. Stem has 10 letters. Loop has 3 letters. [2025-04-26 16:26:12,093 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:12,093 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 120 transitions. Stem has 7 letters. Loop has 6 letters. [2025-04-26 16:26:12,094 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:26:12,094 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 261560 states and 1297940 transitions. [2025-04-26 16:26:17,044 INFO L131 ngComponentsAnalysis]: Automaton has 3099 accepting balls. 11391 [2025-04-26 16:26:19,983 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 261560 states to 211423 states and 1022081 transitions. [2025-04-26 16:26:19,984 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42883 [2025-04-26 16:26:20,169 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48313 [2025-04-26 16:26:20,170 INFO L74 IsDeterministic]: Start isDeterministic. Operand 211423 states and 1022081 transitions. [2025-04-26 16:26:20,170 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:26:20,170 INFO L218 hiAutomatonCegarLoop]: Abstraction has 211423 states and 1022081 transitions. [2025-04-26 16:26:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211423 states and 1022081 transitions. [2025-04-26 16:26:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211423 to 111633. [2025-04-26 16:26:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111633 states, 111633 states have (on average 5.0617559323855845) internal successors, (in total 565059), 111632 states have internal predecessors, (565059), 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 16:26:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111633 states to 111633 states and 565059 transitions. [2025-04-26 16:26:25,478 INFO L240 hiAutomatonCegarLoop]: Abstraction has 111633 states and 565059 transitions. [2025-04-26 16:26:25,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-26 16:26:25,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-26 16:26:25,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-26 16:26:25,482 INFO L87 Difference]: Start difference. First operand 111633 states and 565059 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (in total 7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:26:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-26 16:26:25,539 INFO L93 Difference]: Finished difference Result 1380 states and 3245 transitions. [2025-04-26 16:26:25,539 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1380 states and 3245 transitions. [2025-04-26 16:26:25,544 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:26:25,544 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1380 states to 0 states and 0 transitions. [2025-04-26 16:26:25,544 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:26:25,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:26:25,544 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:26:25,544 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:26:25,544 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:26:25,544 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:26:25,545 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-26 16:26:25,545 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:26:25,545 INFO L340 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2025-04-26 16:26:25,545 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:26:25,545 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:26:25,545 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:26:25,552 INFO L201 PluginConnector]: Adding new model lock4.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:26:25 BoogieIcfgContainer [2025-04-26 16:26:25,552 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:26:25,553 INFO L158 Benchmark]: Toolchain (without parser) took 32743.53ms. Allocated memory was 159.4MB in the beginning and 6.7GB in the end (delta: 6.5GB). Free memory was 85.5MB in the beginning and 3.9GB in the end (delta: -3.8GB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. [2025-04-26 16:26:25,553 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 86.4MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:26:25,554 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.01ms. Allocated memory is still 159.4MB. Free memory was 85.5MB in the beginning and 83.7MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:26:25,554 INFO L158 Benchmark]: Boogie Preprocessor took 28.25ms. Allocated memory is still 159.4MB. Free memory was 83.7MB in the beginning and 82.7MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-26 16:26:25,554 INFO L158 Benchmark]: RCFGBuilder took 193.36ms. Allocated memory is still 159.4MB. Free memory was 82.5MB in the beginning and 72.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-26 16:26:25,554 INFO L158 Benchmark]: BuchiAutomizer took 32491.23ms. Allocated memory was 159.4MB in the beginning and 6.7GB in the end (delta: 6.5GB). Free memory was 72.6MB in the beginning and 3.9GB in the end (delta: -3.8GB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. [2025-04-26 16:26:25,555 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 0.15ms. Allocated memory is still 159.4MB. Free memory is still 86.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.01ms. Allocated memory is still 159.4MB. Free memory was 85.5MB in the beginning and 83.7MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 28.25ms. Allocated memory is still 159.4MB. Free memory was 83.7MB in the beginning and 82.7MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 193.36ms. Allocated memory is still 159.4MB. Free memory was 82.5MB in the beginning and 72.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 32491.23ms. Allocated memory was 159.4MB in the beginning and 6.7GB in the end (delta: 6.5GB). Free memory was 72.6MB in the beginning and 3.9GB in the end (delta: -3.8GB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 32.4s and 6 iterations. TraceHistogramMax:1. Analysis of lassos took 2.0s. Construction of modules took 0.2s. Büchi inclusion checks took 5.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 5. Automata minimization 9.4s AutomataMinimizationTime, 5 MinimizatonAttempts, 134637 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 13.1s Buchi closure took 0.3s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [5, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 430 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 425 mSDsluCounter, 451 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 201 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 468 IncrementalHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 250 mSDtfsCounter, 468 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf100 lsp70 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf94 smp100 dnf100 smp100 tf111 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 25ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 3 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.7s InitialAbstractionConstructionTime: 0.0s InitialAbstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (1 trivial, 5 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * x1 + z and consists of 4 locations. One deterministic module has affine ranking function z + -1 * x2 and consists of 4 locations. One deterministic module has affine ranking function -1 * x3 + z and consists of 4 locations. One deterministic module has affine ranking function -1 * x4 + z and consists of 4 locations. One deterministic module has affine ranking function z + -1 * x2 and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2025-04-26 16:26:25,568 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...