/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/loop-lockstep-example.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:20:39,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:20:39,368 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2025-04-26 16:20:39,371 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:20:39,372 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:20:39,394 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:20:39,394 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:20:39,394 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:20:39,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:20:39,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:20:39,395 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:20:39,395 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:20:39,395 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:20:39,395 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:20:39,395 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:20:39,395 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:20:39,395 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:20:39,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:20:39,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:20:39,395 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:20:39,396 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:20:39,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:20:39,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:20:39,397 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:20:39,397 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:20:39,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:20:39,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:20:39,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:20:39,621 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:20:39,621 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:20:39,623 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/regression/loop-lockstep-example.bpl [2025-04-26 16:20:39,624 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/regression/loop-lockstep-example.bpl' [2025-04-26 16:20:39,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:20:39,642 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:20:39,642 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:20:39,643 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:20:39,643 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:20:39,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,672 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,677 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:20:39,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:20:39,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:20:39,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:20:39,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:20:39,683 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,685 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,685 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,686 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,686 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,689 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,690 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,690 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:20:39,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:20:39,700 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:20:39,700 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:20:39,702 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/1) ... [2025-04-26 16:20:39,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:39,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:39,724 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 16:20:39,727 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 16:20:39,749 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-04-26 16:20:39,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:20:39,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:20:39,750 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-04-26 16:20:39,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:20:39,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:20:39,750 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-04-26 16:20:39,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:20:39,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:20:39,750 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 16:20:39,785 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:20:39,786 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:20:39,866 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:20:39,866 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:20:39,875 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:20:39,875 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-26 16:20:39,877 INFO L201 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:20:39 BoogieIcfgContainer [2025-04-26 16:20:39,877 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:20:39,879 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:20:39,879 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:20:39,883 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:20:39,884 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:20:39,884 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:39" (1/2) ... [2025-04-26 16:20:39,885 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7fd1a08d and model type loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:20:39, skipping insertion in model container [2025-04-26 16:20:39,885 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:20:39,885 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:20:39" (2/2) ... [2025-04-26 16:20:39,886 INFO L376 chiAutomizerObserver]: Analyzing ICFG loop-lockstep-example.bpl [2025-04-26 16:20:39,937 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-26 16:20:39,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2025-04-26 16:20:39,992 INFO L116 PetriNetUnfolderBase]: 2/23 cut-off events. [2025-04-26 16:20:39,995 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-26 16:20:39,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 2/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-04-26 16:20:39,999 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2025-04-26 16:20:40,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2025-04-26 16:20:40,006 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 28 places, 23 transitions, 58 flow [2025-04-26 16:20:40,014 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:20:40,014 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:20:40,014 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:20:40,015 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:20:40,015 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:20:40,015 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:20:40,015 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:20:40,015 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:20:40,016 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2025-04-26 16:20:40,056 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 54 [2025-04-26 16:20:40,057 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:20:40,057 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:20:40,060 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:20:40,060 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2025-04-26 16:20:40,060 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:20:40,060 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 74 states, but on-demand construction may add more states [2025-04-26 16:20:40,066 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 54 [2025-04-26 16:20:40,066 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:20:40,066 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:20:40,066 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:20:40,066 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2025-04-26 16:20:40,072 INFO L752 eck$LassoCheckResult]: Stem: "[46] $Ultimate##0-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x]" "[71] L43-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_12} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0, thread1Thread1of1ForFork0_i]" "[54] $Ultimate##0-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_i_1 0) InVars {} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_1} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i]" [2025-04-26 16:20:40,073 INFO L754 eck$LassoCheckResult]: Loop: "[56] L19-1-->L20: Formula: (< v_thread1Thread1of1ForFork0_i_5 v_N_1) InVars {thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_5, N=v_N_1} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_5, N=v_N_1} AuxVars[] AssignedVars[]" "[58] L20-->L21: Formula: (= v_x_1 (+ v_x_2 1)) InVars {x=v_x_2} OutVars{x=v_x_1} AuxVars[] AssignedVars[x]" "[59] L21-->L22: Formula: (= (+ v_x_4 1) v_x_3) InVars {x=v_x_4} OutVars{x=v_x_3} AuxVars[] AssignedVars[x]" "[60] L22-->L23: Formula: (= (+ v_x_6 1) v_x_5) InVars {x=v_x_6} OutVars{x=v_x_5} AuxVars[] AssignedVars[x]" "[61] L23-->L24: Formula: (= v_x_7 (+ v_x_8 1)) InVars {x=v_x_8} OutVars{x=v_x_7} AuxVars[] AssignedVars[x]" "[62] L24-->L19-1: Formula: (= (+ v_thread1Thread1of1ForFork0_i_7 1) v_thread1Thread1of1ForFork0_i_8) InVars {thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_7} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_8} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i]" [2025-04-26 16:20:40,077 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash 76252, now seen corresponding path program 1 times [2025-04-26 16:20:40,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:40,083 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406753594] [2025-04-26 16:20:40,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:40,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:40,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:20:40,138 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:20:40,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:40,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:40,139 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:40,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:20:40,141 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:20:40,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:40,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:40,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:40,154 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1748849659, now seen corresponding path program 1 times [2025-04-26 16:20:40,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:40,155 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485833475] [2025-04-26 16:20:40,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:40,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:40,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:20:40,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:20:40,165 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:40,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:40,165 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:40,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:20:40,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:20:40,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:40,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:40,170 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:40,171 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -210385504, now seen corresponding path program 1 times [2025-04-26 16:20:40,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:40,171 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056062715] [2025-04-26 16:20:40,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:40,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:40,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-26 16:20:40,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-26 16:20:40,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:40,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:40,178 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:40,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-26 16:20:40,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-26 16:20:40,182 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:40,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:40,183 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:40,279 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:20:40,280 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:20:40,280 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:20:40,280 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:20:40,280 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:20:40,280 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:40,280 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:20:40,280 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:20:40,280 INFO L132 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_petrified1_Iteration1_Loop [2025-04-26 16:20:40,280 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:20:40,281 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:20:40,292 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:40,302 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:40,342 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:20:40,342 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:20:40,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:40,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:40,346 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 16:20:40,348 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 16:20:40,349 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:20:40,349 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:40,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2025-04-26 16:20:40,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:40,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:40,372 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 16:20:40,375 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 16:20:40,376 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:20:40,376 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:40,403 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:20:40,404 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {x=0} Honda state: {x=0} Generalized eigenvectors: [{x=5}, {x=-1}, {x=0}] Lambdas: [1, 1, 0] Nus: [0, 0] [2025-04-26 16:20:40,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2025-04-26 16:20:40,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:40,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:40,413 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 16:20:40,414 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 16:20:40,416 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:20:40,417 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:40,434 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 16:20:40,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:40,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:40,436 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 16:20:40,439 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 16:20:40,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:20:40,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:40,505 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:20:40,509 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 16:20:40,509 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:20:40,510 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:20:40,510 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:20:40,510 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:20:40,510 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:20:40,510 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:40,510 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:20:40,510 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:20:40,510 INFO L132 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_petrified1_Iteration1_Loop [2025-04-26 16:20:40,510 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:20:40,510 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:20:40,511 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:40,519 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:40,548 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:20:40,551 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:20:40,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:40,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:40,554 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 16:20:40,556 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 16:20:40,557 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 16:20:40,568 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:20:40,568 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:20:40,569 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:20:40,569 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:20:40,569 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:20:40,575 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:20:40,575 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:20:40,578 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:20:40,586 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 16:20:40,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:40,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:40,588 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 16:20:40,589 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 16:20:40,591 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 16:20:40,600 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:20:40,600 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:20:40,600 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:20:40,600 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:20:40,600 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:20:40,601 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:20:40,601 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:20:40,603 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:20:40,606 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:20:40,606 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:20:40,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:40,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:40,609 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 16:20:40,610 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 16:20:40,612 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:20:40,614 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:20:40,615 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 16:20:40,615 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:20:40,615 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:20:40,616 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread1Thread1of1ForFork0_i, N) = -1*thread1Thread1of1ForFork0_i + 1*N Supporting invariants [] [2025-04-26 16:20:40,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2025-04-26 16:20:40,623 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:20:40,639 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:40,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:20:40,645 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:20:40,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:40,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:20:40,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:20:40,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:20:40,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-26 16:20:40,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-26 16:20:40,657 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:40,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:20:40,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:20:40,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:20:40,764 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 16:20:40,813 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2025-04-26 16:20:40,817 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 74 states, but on-demand construction may add more states Second operand has 3 states, 3 states have (on average 3.0) internal successors, (in total 9), 3 states have internal predecessors, (9), 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 16:20:40,944 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 74 states, but on-demand construction may add more states. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (in total 9), 3 states have internal predecessors, (9), 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 170 states and 382 transitions. Complement of second has 6 states. [2025-04-26 16:20:40,946 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 16:20:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.0) internal successors, (in total 9), 3 states have internal predecessors, (9), 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 16:20:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2025-04-26 16:20:40,959 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 46 transitions. Stem has 3 letters. Loop has 6 letters. [2025-04-26 16:20:40,959 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:40,959 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 46 transitions. Stem has 9 letters. Loop has 6 letters. [2025-04-26 16:20:40,960 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:40,960 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 46 transitions. Stem has 3 letters. Loop has 12 letters. [2025-04-26 16:20:40,960 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:40,961 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 382 transitions. [2025-04-26 16:20:40,967 INFO L131 ngComponentsAnalysis]: Automaton has 10 accepting balls. 30 [2025-04-26 16:20:40,973 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 100 states and 225 transitions. [2025-04-26 16:20:40,973 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 52 [2025-04-26 16:20:40,974 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 66 [2025-04-26 16:20:40,974 INFO L74 IsDeterministic]: Start isDeterministic. Operand 100 states and 225 transitions. [2025-04-26 16:20:40,974 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:20:40,974 INFO L218 hiAutomatonCegarLoop]: Abstraction has 100 states and 225 transitions. [2025-04-26 16:20:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states and 225 transitions. [2025-04-26 16:20:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2025-04-26 16:20:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 89 states have (on average 2.247191011235955) internal successors, (in total 200), 88 states have internal predecessors, (200), 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 16:20:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 200 transitions. [2025-04-26 16:20:41,003 INFO L240 hiAutomatonCegarLoop]: Abstraction has 89 states and 200 transitions. [2025-04-26 16:20:41,003 INFO L438 stractBuchiCegarLoop]: Abstraction has 89 states and 200 transitions. [2025-04-26 16:20:41,003 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:20:41,004 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 200 transitions. [2025-04-26 16:20:41,005 INFO L131 ngComponentsAnalysis]: Automaton has 10 accepting balls. 30 [2025-04-26 16:20:41,005 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:20:41,005 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:20:41,005 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2025-04-26 16:20:41,005 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:20:41,006 INFO L752 eck$LassoCheckResult]: Stem: "[46] $Ultimate##0-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x]" "[71] L43-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_12} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0, thread1Thread1of1ForFork0_i]" "[74] L43-1-->$Ultimate##0: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_12, thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j, thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" "[63] $Ultimate##0-->L33-1: Formula: (= v_thread2Thread1of1ForFork1_j_1 0) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_1} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j]" [2025-04-26 16:20:41,006 INFO L754 eck$LassoCheckResult]: Loop: "[65] L33-1-->L34: Formula: (< v_thread2Thread1of1ForFork1_j_5 v_N_3) InVars {thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_5, N=v_N_3} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_5, N=v_N_3} AuxVars[] AssignedVars[]" "[67] L34-->L35: Formula: (= v_x_10 (+ v_x_9 4)) InVars {x=v_x_10} OutVars{x=v_x_9} AuxVars[] AssignedVars[x]" "[68] L35-->L33-1: Formula: (= (+ v_thread2Thread1of1ForFork1_j_7 1) v_thread2Thread1of1ForFork1_j_8) InVars {thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_7} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_8} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j]" [2025-04-26 16:20:41,006 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2364495, now seen corresponding path program 1 times [2025-04-26 16:20:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:41,006 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68345028] [2025-04-26 16:20:41,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:41,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:41,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:20:41,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:20:41,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:41,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:41,011 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:41,012 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:20:41,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:20:41,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:41,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:41,013 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:41,014 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:41,014 INFO L85 PathProgramCache]: Analyzing trace with hash 94401, now seen corresponding path program 1 times [2025-04-26 16:20:41,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:41,014 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383523259] [2025-04-26 16:20:41,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:41,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:41,017 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:20:41,019 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:20:41,019 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:41,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:41,019 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:41,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:20:41,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:20:41,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:41,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:41,026 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:41,027 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1721258419, now seen corresponding path program 1 times [2025-04-26 16:20:41,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:41,028 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277516023] [2025-04-26 16:20:41,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:41,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:41,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-26 16:20:41,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-26 16:20:41,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:41,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:41,039 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:41,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-26 16:20:41,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-26 16:20:41,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:41,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:41,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:41,073 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:20:41,073 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:20:41,073 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:20:41,073 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:20:41,074 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:20:41,074 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:41,074 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:20:41,074 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:20:41,074 INFO L132 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_petrified1_Iteration2_Loop [2025-04-26 16:20:41,074 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:20:41,074 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:20:41,074 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:41,084 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:41,112 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:20:41,113 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:20:41,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:41,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:41,115 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 16:20:41,117 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 16:20:41,118 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:20:41,118 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:41,136 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 16:20:41,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:41,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:41,138 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 16:20:41,140 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 16:20:41,142 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:20:41,143 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:41,209 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:20:41,213 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 16:20:41,213 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:20:41,214 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:20:41,214 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:20:41,214 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:20:41,214 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:20:41,214 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:41,214 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:20:41,214 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:20:41,214 INFO L132 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_petrified1_Iteration2_Loop [2025-04-26 16:20:41,214 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:20:41,214 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:20:41,215 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:41,220 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:41,245 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:20:41,245 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:20:41,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:41,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:41,248 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 16:20:41,248 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 16:20:41,250 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 16:20:41,259 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:20:41,260 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:20:41,260 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:20:41,260 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:20:41,260 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:20:41,261 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:20:41,261 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:20:41,262 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:20:41,266 INFO L436 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-04-26 16:20:41,266 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:20:41,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:41,268 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 16:20:41,269 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 16:20:41,270 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:20:41,273 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 16:20:41,273 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:20:41,273 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:20:41,273 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread2Thread1of1ForFork1_j, N) = -1*thread2Thread1of1ForFork1_j + 1*N Supporting invariants [] [2025-04-26 16:20:41,278 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 16:20:41,280 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:20:41,293 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:41,297 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:20:41,299 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:20:41,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:41,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:20:41,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:20:41,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:20:41,307 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:20:41,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:20:41,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:41,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:20:41,309 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:20:41,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:20:41,333 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 16:20:41,334 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2025-04-26 16:20:41,334 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 200 transitions. cyclomatic complexity: 124 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 16:20:41,369 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 200 transitions. cyclomatic complexity: 124. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (in total 7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 226 states and 538 transitions. Complement of second has 6 states. [2025-04-26 16:20:41,370 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 16:20:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (in total 7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:20:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2025-04-26 16:20:41,371 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 4 letters. Loop has 3 letters. [2025-04-26 16:20:41,371 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:41,372 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 7 letters. Loop has 3 letters. [2025-04-26 16:20:41,372 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:41,372 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 4 letters. Loop has 6 letters. [2025-04-26 16:20:41,372 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:41,372 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 226 states and 538 transitions. [2025-04-26 16:20:41,378 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:20:41,378 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 226 states to 0 states and 0 transitions. [2025-04-26 16:20:41,378 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:20:41,378 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:20:41,378 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:20:41,378 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:20:41,378 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:20:41,378 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:20:41,378 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:20:41,378 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:20:41,379 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:20:41,379 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:20:41,379 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:20:41,387 INFO L201 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:20:41 BoogieIcfgContainer [2025-04-26 16:20:41,387 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:20:41,387 INFO L158 Benchmark]: Toolchain (without parser) took 1746.02ms. Allocated memory was 159.4MB in the beginning and 142.6MB in the end (delta: -16.8MB). Free memory was 86.1MB in the beginning and 74.4MB in the end (delta: 11.7MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:20:41,388 INFO L158 Benchmark]: Boogie PL CUP Parser took 1.10ms. Allocated memory is still 159.4MB. Free memory is still 87.1MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:20:41,388 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.79ms. Allocated memory is still 159.4MB. Free memory was 86.1MB in the beginning and 84.3MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:20:41,388 INFO L158 Benchmark]: Boogie Preprocessor took 20.04ms. Allocated memory is still 159.4MB. Free memory was 84.3MB in the beginning and 83.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:20:41,388 INFO L158 Benchmark]: RCFGBuilder took 176.95ms. Allocated memory is still 159.4MB. Free memory was 83.3MB in the beginning and 74.3MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-26 16:20:41,388 INFO L158 Benchmark]: BuchiAutomizer took 1508.09ms. Allocated memory was 159.4MB in the beginning and 142.6MB in the end (delta: -16.8MB). Free memory was 74.2MB in the beginning and 74.4MB in the end (delta: -170.2kB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:20:41,389 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 1.10ms. Allocated memory is still 159.4MB. Free memory is still 87.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 35.79ms. Allocated memory is still 159.4MB. Free memory was 86.1MB in the beginning and 84.3MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 20.04ms. Allocated memory is still 159.4MB. Free memory was 84.3MB in the beginning and 83.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 176.95ms. Allocated memory is still 159.4MB. Free memory was 83.3MB in the beginning and 74.3MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 1508.09ms. Allocated memory was 159.4MB in the beginning and 142.6MB in the end (delta: -16.8MB). Free memory was 74.2MB in the beginning and 74.4MB in the end (delta: -170.2kB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.4s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 0.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 11 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 96 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 46 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 50 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 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: 26ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 1 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s InitialAbstractionConstructionTime: 0.0s InitialAbstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (0 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * i + N and consists of 4 locations. One deterministic module has affine ranking function N + -1 * j and consists of 4 locations. - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2025-04-26 16:20:41,399 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...