/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:22:34,941 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:22:34,999 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2025-04-26 16:22:35,006 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:22:35,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:22:35,030 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:22:35,030 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:22:35,030 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:22:35,031 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:22:35,031 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:22:35,031 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:22:35,031 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:22:35,031 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:22:35,031 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:22:35,031 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:22:35,031 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:22:35,031 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:22:35,031 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:22:35,032 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:22:35,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:22:35,033 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:22:35,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:22:35,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:22:35,034 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:22:35,034 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:22:35,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:22:35,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:22:35,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:22:35,260 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:22:35,260 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:22:35,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl [2025-04-26 16:22:35,263 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl' [2025-04-26 16:22:35,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:22:35,288 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:22:35,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:22:35,288 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:22:35,288 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:22:35,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,308 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,313 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:22:35,314 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:22:35,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:22:35,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:22:35,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:22:35,319 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,320 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,322 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,322 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,324 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,324 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,324 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,335 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:22:35,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:22:35,336 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:22:35,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:22:35,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/1) ... [2025-04-26 16:22:35,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:22:35,360 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 16:22:35,363 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 16:22:35,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-04-26 16:22:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:22:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:22:35,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-04-26 16:22:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:22:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:22:35,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-04-26 16:22:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:22:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:22:35,390 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 16:22:35,431 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:22:35,433 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:22:35,539 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:22:35,539 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:22:35,570 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:22:35,571 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-04-26 16:22:35,572 INFO L201 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:22:35 BoogieIcfgContainer [2025-04-26 16:22:35,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:22:35,572 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:22:35,573 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:22:35,576 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:22:35,577 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:22:35,577 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:22:35" (1/2) ... [2025-04-26 16:22:35,578 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5943805a and model type word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:22:35, skipping insertion in model container [2025-04-26 16:22:35,578 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:22:35,578 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:22:35" (2/2) ... [2025-04-26 16:22:35,579 INFO L376 chiAutomizerObserver]: Analyzing ICFG word-symm.wvr.bpl [2025-04-26 16:22:35,620 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-26 16:22:35,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 22 transitions, 58 flow [2025-04-26 16:22:35,662 INFO L116 PetriNetUnfolderBase]: 4/18 cut-off events. [2025-04-26 16:22:35,663 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-26 16:22:35,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 4/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2025-04-26 16:22:35,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 22 transitions, 58 flow [2025-04-26 16:22:35,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 18 transitions, 48 flow [2025-04-26 16:22:35,668 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 21 places, 18 transitions, 48 flow [2025-04-26 16:22:35,676 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:22:35,676 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:22:35,676 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:22:35,677 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:22:35,677 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:22:35,677 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:22:35,677 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:22:35,677 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:22:35,678 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2025-04-26 16:22:35,699 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 9 [2025-04-26 16:22:35,699 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:22:35,699 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:22:35,702 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:22:35,702 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2025-04-26 16:22:35,702 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:22:35,702 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 29 states, but on-demand construction may add more states [2025-04-26 16:22:35,705 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 9 [2025-04-26 16:22:35,705 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:22:35,705 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:22:35,706 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:22:35,706 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2025-04-26 16:22:35,709 INFO L752 eck$LassoCheckResult]: Stem: "[92] $Ultimate##0-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[80] $Ultimate##0-->L32: Formula: (and (= v_count_4_7 v_count_1_7) (= v_i_6_10 0) (not v_break_7_9)) InVars {count_4=v_count_4_7, count_1=v_count_1_7} OutVars{i_6=v_i_6_10, count_1=v_count_1_7, break_7=v_break_7_9, count_4=v_count_4_7} AuxVars[] AssignedVars[i_6, break_7]" [2025-04-26 16:22:35,710 INFO L754 eck$LassoCheckResult]: Loop: "[83] L32-->L32: Formula: (let ((.cse1 (not v_break_7_22)) (.cse2 (select v_array_3_9 v_i_6_23)) (.cse3 (select v_array_0_9 v_i_6_23))) (and (< v_i_6_23 v_len_5_9) (= (+ v_i_6_23 1) v_i_6_22) (let ((.cse0 (= .cse2 .cse3))) (or (and (or (not .cse0) v_break_7_22) v_break_7_21) (and (not v_break_7_21) .cse1 .cse0))) .cse1 (= v_result_8_17 (ite (< .cse3 .cse2) (- 1) (ite (< .cse2 .cse3) 1 v_result_8_18))) (< v_i_6_23 v_len_2_9))) InVars {i_6=v_i_6_23, result_8=v_result_8_18, array_3=v_array_3_9, break_7=v_break_7_22, array_0=v_array_0_9, len_2=v_len_2_9, len_5=v_len_5_9} OutVars{i_6=v_i_6_22, result_8=v_result_8_17, array_3=v_array_3_9, break_7=v_break_7_21, array_0=v_array_0_9, len_2=v_len_2_9, len_5=v_len_5_9} AuxVars[] AssignedVars[i_6, result_8, break_7]" [2025-04-26 16:22:35,713 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:22:35,713 INFO L85 PathProgramCache]: Analyzing trace with hash 3893, now seen corresponding path program 1 times [2025-04-26 16:22:35,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:22:35,718 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818356927] [2025-04-26 16:22:35,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:22:35,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:22:35,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:22:35,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:22:35,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:35,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:35,762 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:22:35,766 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:22:35,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:22:35,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:35,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:35,775 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:22:35,778 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:22:35,778 INFO L85 PathProgramCache]: Analyzing trace with hash 114, now seen corresponding path program 1 times [2025-04-26 16:22:35,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:22:35,778 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030556632] [2025-04-26 16:22:35,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:22:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:22:35,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:22:35,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:22:35,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:35,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:35,793 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:22:35,794 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:22:35,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:22:35,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:35,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:35,799 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:22:35,800 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:22:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash 120766, now seen corresponding path program 1 times [2025-04-26 16:22:35,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:22:35,800 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907352992] [2025-04-26 16:22:35,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:22:35,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:22:35,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:22:35,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:22:35,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:35,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:35,807 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:22:35,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:22:35,812 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:22:35,812 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:35,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:35,814 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:22:36,070 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:22:36,071 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:22:36,071 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:22:36,071 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:22:36,071 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:22:36,071 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:36,071 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:22:36,071 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:22:36,072 INFO L132 ssoRankerPreferences]: Filename of dumped script: word-symm.wvr.bpl_petrified1_Iteration1_Lasso [2025-04-26 16:22:36,072 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:22:36,072 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:22:36,083 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:22:36,089 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:22:36,190 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:22:36,426 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:22:36,429 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:22:36,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:22:36,432 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 16:22:36,434 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 16:22:36,442 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 16:22:36,452 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:22:36,452 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:22:36,453 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:22:36,453 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:22:36,457 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2025-04-26 16:22:36,458 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2025-04-26 16:22:36,461 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:22:36,468 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 16:22:36,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:36,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:22:36,470 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 16:22:36,471 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 16:22:36,478 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 16:22:36,489 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:22:36,489 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:22:36,489 INFO L204 nArgumentSynthesizer]: 3 loop disjuncts [2025-04-26 16:22:36,489 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:22:36,517 INFO L402 nArgumentSynthesizer]: We have 30 Motzkin's Theorem applications. [2025-04-26 16:22:36,517 INFO L403 nArgumentSynthesizer]: A total of 6 supporting invariants were added. [2025-04-26 16:22:36,541 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:22:36,547 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 16:22:36,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:22:36,550 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 16:22:36,551 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 16:22:36,553 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 16:22:36,563 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:22:36,564 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:22:36,564 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:22:36,564 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:22:36,586 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2025-04-26 16:22:36,586 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2025-04-26 16:22:36,591 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:22:36,601 INFO L436 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2025-04-26 16:22:36,601 INFO L437 ModelExtractionUtils]: 7 out of 13 variables were initially zero. Simplification set additionally 3 variables to zero. [2025-04-26 16:22:36,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:22:36,606 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 16:22:36,607 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 16:22:36,607 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:22:36,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2025-04-26 16:22:36,625 INFO L439 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2025-04-26 16:22:36,625 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:22:36,625 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(len_2, i_6) = 1*len_2 - 1*i_6 Supporting invariants [] [2025-04-26 16:22:36,631 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 16:22:36,633 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:22:36,650 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:22:36,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:22:36,659 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:22:36,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:36,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:22:36,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:22:36,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:22:36,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:22:36,685 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:22:36,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:36,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:22:36,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:22:36,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:22:36,688 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 16:22:36,731 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2025-04-26 16:22:36,734 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 29 states, but on-demand construction may add more states Second operand has 2 states, 2 states have (on average 1.5) internal successors, (in total 3), 2 states have internal predecessors, (3), 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 16:22:36,803 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 29 states, but on-demand construction may add more states. Second operand has 2 states, 2 states have (on average 1.5) internal successors, (in total 3), 2 states have internal predecessors, (3), 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 85 states and 199 transitions. Complement of second has 5 states. [2025-04-26 16:22:36,804 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2025-04-26 16:22:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 1.5) internal successors, (in total 3), 2 states have internal predecessors, (3), 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 16:22:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2025-04-26 16:22:36,815 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 2 letters. Loop has 1 letters. [2025-04-26 16:22:36,816 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:22:36,816 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 3 letters. Loop has 1 letters. [2025-04-26 16:22:36,816 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:22:36,816 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 2 letters. Loop has 2 letters. [2025-04-26 16:22:36,816 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:22:36,817 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 199 transitions. [2025-04-26 16:22:36,820 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 8 [2025-04-26 16:22:36,832 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 33 states and 74 transitions. [2025-04-26 16:22:36,833 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2025-04-26 16:22:36,833 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2025-04-26 16:22:36,834 INFO L74 IsDeterministic]: Start isDeterministic. Operand 33 states and 74 transitions. [2025-04-26 16:22:36,834 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:22:36,834 INFO L218 hiAutomatonCegarLoop]: Abstraction has 33 states and 74 transitions. [2025-04-26 16:22:36,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 74 transitions. [2025-04-26 16:22:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2025-04-26 16:22:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 22 states have (on average 2.5) internal successors, (in total 55), 21 states have internal predecessors, (55), 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 16:22:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 55 transitions. [2025-04-26 16:22:36,852 INFO L240 hiAutomatonCegarLoop]: Abstraction has 22 states and 55 transitions. [2025-04-26 16:22:36,852 INFO L438 stractBuchiCegarLoop]: Abstraction has 22 states and 55 transitions. [2025-04-26 16:22:36,852 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:22:36,852 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 55 transitions. [2025-04-26 16:22:36,853 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 5 [2025-04-26 16:22:36,853 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:22:36,853 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:22:36,853 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:22:36,853 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2025-04-26 16:22:36,854 INFO L752 eck$LassoCheckResult]: Stem: "[92] $Ultimate##0-->$Ultimate##0: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[95] L85-->$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]" "[85] $Ultimate##0-->L62: Formula: (and (not v_break_10_17) (= v_i_9_14 0) (= v_count_1_11 v_count_4_11)) InVars {count_4=v_count_4_11, count_1=v_count_1_11} OutVars{break_10=v_break_10_17, count_1=v_count_1_11, count_4=v_count_4_11, i_9=v_i_9_14} AuxVars[] AssignedVars[break_10, i_9]" [2025-04-26 16:22:36,854 INFO L754 eck$LassoCheckResult]: Loop: "[88] L62-->L62: Formula: (let ((.cse3 (select v_array_0_15 v_i_9_19)) (.cse2 (select v_array_3_15 v_i_9_19)) (.cse0 (not v_break_10_22))) (and (let ((.cse1 (= .cse2 .cse3))) (or (and (not v_break_10_21) .cse0 .cse1) (and v_break_10_21 (or (not .cse1) v_break_10_22)))) (< v_i_9_19 v_len_2_15) (= v_result_11_21 (ite (< .cse2 .cse3) (- 1) (ite (< .cse3 .cse2) 1 v_result_11_22))) .cse0 (< v_i_9_19 v_len_5_15) (= (+ v_i_9_19 1) v_i_9_18))) InVars {break_10=v_break_10_22, result_11=v_result_11_22, array_3=v_array_3_15, array_0=v_array_0_15, len_2=v_len_2_15, len_5=v_len_5_15, i_9=v_i_9_19} OutVars{break_10=v_break_10_21, result_11=v_result_11_21, array_3=v_array_3_15, array_0=v_array_0_15, len_2=v_len_2_15, len_5=v_len_5_15, i_9=v_i_9_18} AuxVars[] AssignedVars[break_10, result_11, i_9]" [2025-04-26 16:22:36,854 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:22:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 121233, now seen corresponding path program 1 times [2025-04-26 16:22:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:22:36,854 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172880746] [2025-04-26 16:22:36,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:22:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:22:36,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:22:36,859 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:22:36,859 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:36,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:36,859 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:22:36,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:22:36,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:22:36,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:36,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:36,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:22:36,863 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:22:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash 119, now seen corresponding path program 1 times [2025-04-26 16:22:36,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:22:36,863 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286758563] [2025-04-26 16:22:36,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:22:36,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:22:36,865 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:22:36,867 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:22:36,867 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:36,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:36,867 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:22:36,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:22:36,870 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:22:36,871 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:36,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:36,872 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:22:36,872 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:22:36,872 INFO L85 PathProgramCache]: Analyzing trace with hash 3758311, now seen corresponding path program 1 times [2025-04-26 16:22:36,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:22:36,872 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953693679] [2025-04-26 16:22:36,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:22:36,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:22:36,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:22:36,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:22:36,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:36,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:36,878 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:22:36,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-26 16:22:36,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-26 16:22:36,882 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:36,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:22:36,883 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:22:37,025 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:22:37,025 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:22:37,025 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:22:37,025 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:22:37,025 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:22:37,025 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:37,025 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:22:37,025 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:22:37,025 INFO L132 ssoRankerPreferences]: Filename of dumped script: word-symm.wvr.bpl_petrified1_Iteration2_Lasso [2025-04-26 16:22:37,025 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:22:37,025 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:22:37,026 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:22:37,031 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:22:37,034 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:22:37,109 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:22:37,112 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:22:37,292 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:22:37,292 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:22:37,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:37,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:22:37,296 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 16:22:37,297 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 16:22:37,298 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 16:22:37,308 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:22:37,308 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:22:37,308 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:22:37,308 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:22:37,310 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2025-04-26 16:22:37,310 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2025-04-26 16:22:37,313 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:22:37,319 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 16:22:37,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:37,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:22:37,321 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 16:22:37,323 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 16:22:37,324 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 16:22:37,334 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:22:37,334 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:22:37,335 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:22:37,335 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:22:37,338 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2025-04-26 16:22:37,338 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2025-04-26 16:22:37,346 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:22:37,352 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 16:22:37,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:37,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:22:37,355 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 16:22:37,357 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 16:22:37,357 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 16:22:37,367 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:22:37,367 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:22:37,367 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:22:37,367 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:22:37,369 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2025-04-26 16:22:37,369 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2025-04-26 16:22:37,374 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:22:37,380 INFO L436 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2025-04-26 16:22:37,380 INFO L437 ModelExtractionUtils]: 7 out of 13 variables were initially zero. Simplification set additionally 3 variables to zero. [2025-04-26 16:22:37,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:22:37,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:22:37,382 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 16:22:37,383 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 16:22:37,384 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:22:37,400 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 16:22:37,401 INFO L439 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2025-04-26 16:22:37,401 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:22:37,401 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(i_9, len_5) = -1*i_9 + 1*len_5 Supporting invariants [] [2025-04-26 16:22:37,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2025-04-26 16:22:37,407 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:22:37,417 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:22:37,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:22:37,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:22:37,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:37,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:22:37,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:22:37,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:22:37,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1 statements into 1 equivalence classes. [2025-04-26 16:22:37,435 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1 of 1 statements. [2025-04-26 16:22:37,435 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:22:37,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:22:37,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:22:37,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:22:37,436 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 16:22:37,436 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2025-04-26 16:22:37,436 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states and 55 transitions. cyclomatic complexity: 41 Second operand has 2 states, 2 states have (on average 2.0) internal successors, (in total 4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:22:37,466 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 22 states and 55 transitions. cyclomatic complexity: 41. Second operand has 2 states, 2 states have (on average 2.0) internal successors, (in total 4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 42 states and 100 transitions. Complement of second has 4 states. [2025-04-26 16:22:37,467 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2025-04-26 16:22:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.0) internal successors, (in total 4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:22:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 21 transitions. [2025-04-26 16:22:37,468 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 3 states and 21 transitions. Stem has 3 letters. Loop has 1 letters. [2025-04-26 16:22:37,468 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:22:37,468 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 3 states and 21 transitions. Stem has 4 letters. Loop has 1 letters. [2025-04-26 16:22:37,468 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:22:37,469 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 3 states and 21 transitions. Stem has 3 letters. Loop has 2 letters. [2025-04-26 16:22:37,469 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:22:37,469 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 42 states and 100 transitions. [2025-04-26 16:22:37,470 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:22:37,470 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 42 states to 0 states and 0 transitions. [2025-04-26 16:22:37,470 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:22:37,470 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:22:37,470 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:22:37,470 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:22:37,470 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:22:37,470 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:22:37,470 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:22:37,470 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:22:37,470 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:22:37,470 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:22:37,470 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:22:37,478 INFO L201 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:22:37 BoogieIcfgContainer [2025-04-26 16:22:37,478 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:22:37,479 INFO L158 Benchmark]: Toolchain (without parser) took 2191.19ms. Allocated memory was 167.8MB in the beginning and 125.8MB in the end (delta: -41.9MB). Free memory was 96.0MB in the beginning and 29.5MB in the end (delta: 66.5MB). Peak memory consumption was 25.8MB. Max. memory is 8.0GB. [2025-04-26 16:22:37,480 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.81ms. Allocated memory is still 167.8MB. Free memory is still 97.1MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:22:37,480 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.65ms. Allocated memory is still 167.8MB. Free memory was 96.0MB in the beginning and 94.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:22:37,481 INFO L158 Benchmark]: Boogie Preprocessor took 21.41ms. Allocated memory is still 167.8MB. Free memory was 94.1MB in the beginning and 93.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:22:37,481 INFO L158 Benchmark]: RCFGBuilder took 235.55ms. Allocated memory is still 167.8MB. Free memory was 93.0MB in the beginning and 80.8MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-26 16:22:37,482 INFO L158 Benchmark]: BuchiAutomizer took 1905.87ms. Allocated memory was 167.8MB in the beginning and 125.8MB in the end (delta: -41.9MB). Free memory was 80.5MB in the beginning and 29.5MB in the end (delta: 51.0MB). Peak memory consumption was 13.2MB. Max. memory is 8.0GB. [2025-04-26 16:22:37,485 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 0.81ms. Allocated memory is still 167.8MB. Free memory is still 97.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.65ms. Allocated memory is still 167.8MB. Free memory was 96.0MB in the beginning and 94.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 21.41ms. Allocated memory is still 167.8MB. Free memory was 94.1MB in the beginning and 93.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 235.55ms. Allocated memory is still 167.8MB. Free memory was 93.0MB in the beginning and 80.8MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * BuchiAutomizer took 1905.87ms. Allocated memory was 167.8MB in the beginning and 125.8MB in the end (delta: -41.9MB). Free memory was 80.5MB in the beginning and 29.5MB in the end (delta: 51.0MB). Peak memory consumption was 13.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.8s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 1.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 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, 41 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46 IncrementalHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 10 mSDtfsCounter, 46 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso2 LassoPreprocessingBenchmarks: Lassos: inital94 mio100 ax100 hnf100 lsp208 ukn38 mio100 lsp75 div100 bol108 ite100 ukn100 eq148 hnf100 smp100 dnf503 smp13 tf100 neg100 sie119 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 72ms VariablesStem: 1 VariablesLoop: 6 DisjunctsStem: 1 DisjunctsLoop: 3 SupportingInvariants: 6 MotzkinApplications: 30 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s 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 len_2 + -1 * i_6 and consists of 4 locations. One deterministic module has affine ranking function -1 * i_9 + len_5 and consists of 3 locations. - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2025-04-26 16:22:37,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...