/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -i /storage/cav23-termute-examples/2_thr/c4-barrier-2t.c.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:24:14,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:24:14,443 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2025-04-26 16:24:14,448 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:24:14,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:24:14,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:24:14,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:24:14,475 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:24:14,475 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:24:14,475 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:24:14,475 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:24:14,475 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:24:14,475 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:24:14,475 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:24:14,475 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:24:14,476 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:24:14,476 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:24:14,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:24:14,477 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:24:14,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:24:14,477 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:24:14,477 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:24:14,477 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:24:14,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:24:14,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:24:14,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:24:14,726 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:24:14,726 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:24:14,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/cav23-termute-examples/2_thr/c4-barrier-2t.c.bpl [2025-04-26 16:24:14,729 INFO L110 BoogieParser]: Parsing: '/storage/cav23-termute-examples/2_thr/c4-barrier-2t.c.bpl' [2025-04-26 16:24:14,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:24:14,745 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:24:14,745 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:24:14,746 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:24:14,746 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:24:14,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,784 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:24:14,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:24:14,787 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:24:14,787 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:24:14,787 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:24:14,792 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,795 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,797 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,798 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,804 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,816 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:24:14,817 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:24:14,817 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:24:14,817 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:24:14,818 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/1) ... [2025-04-26 16:24:14,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:14,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:14,841 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 16:24:14,845 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 16:24:14,865 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2025-04-26 16:24:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:24:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:24:14,866 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2025-04-26 16:24:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:24:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:24:14,866 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2025-04-26 16:24:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:24:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:24:14,867 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 16:24:14,902 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:24:14,904 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:24:14,989 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:24:14,989 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:24:14,999 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:24:14,999 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-26 16:24:14,999 INFO L201 PluginConnector]: Adding new model c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:24:14 BoogieIcfgContainer [2025-04-26 16:24:15,000 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:24:15,000 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:24:15,000 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:24:15,006 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:24:15,007 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:24:15,007 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:24:14" (1/2) ... [2025-04-26 16:24:15,008 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@286ae339 and model type c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:24:15, skipping insertion in model container [2025-04-26 16:24:15,008 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:24:15,008 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:24:14" (2/2) ... [2025-04-26 16:24:15,009 INFO L376 chiAutomizerObserver]: Analyzing ICFG c4-barrier-2t.c.bpl [2025-04-26 16:24:15,056 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-26 16:24:15,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 30 transitions, 74 flow [2025-04-26 16:24:15,110 INFO L116 PetriNetUnfolderBase]: 4/26 cut-off events. [2025-04-26 16:24:15,112 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-26 16:24:15,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2025-04-26 16:24:15,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 30 transitions, 74 flow [2025-04-26 16:24:15,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 64 flow [2025-04-26 16:24:15,119 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 29 places, 26 transitions, 64 flow [2025-04-26 16:24:15,130 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:24:15,130 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:24:15,130 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:24:15,130 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:24:15,130 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:24:15,130 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:24:15,131 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:24:15,131 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:24:15,132 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2025-04-26 16:24:15,169 INFO L131 ngComponentsAnalysis]: Automaton has 24 accepting balls. 74 [2025-04-26 16:24:15,170 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:24:15,170 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:24:15,172 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:24:15,172 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:24:15,172 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:24:15,173 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 101 states, but on-demand construction may add more states [2025-04-26 16:24:15,178 INFO L131 ngComponentsAnalysis]: Automaton has 24 accepting balls. 74 [2025-04-26 16:24:15,179 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:24:15,179 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:24:15,179 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:24:15,179 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:24:15,185 INFO L752 eck$LassoCheckResult]: Stem: "[61] $Ultimate##0-->L13: Formula: (and (= v_x2_7 0) (= v_x5_5 0)) InVars {x5=v_x5_5, x2=v_x2_7} OutVars{x5=v_x5_5, x2=v_x2_7} AuxVars[] AssignedVars[]" "[88] L13-->L22: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" [2025-04-26 16:24:15,186 INFO L754 eck$LassoCheckResult]: Loop: "[67] L22-->L24: Formula: (< (+ v_x4_1 v_x1_1) v_z_2) InVars {x4=v_x4_1, x1=v_x1_1, z=v_z_2} OutVars{x4=v_x4_1, x1=v_x1_1, z=v_z_2} AuxVars[] AssignedVars[]" "[69] L24-->L25: Formula: (= v_x1_2 (+ v_x1_3 1)) InVars {x1=v_x1_3} OutVars{x1=v_x1_2} AuxVars[] AssignedVars[x1]" "[71] L25-->L22: Formula: (= (+ v_x4_3 1) v_x4_2) InVars {x4=v_x4_3} OutVars{x4=v_x4_2} AuxVars[] AssignedVars[x4]" [2025-04-26 16:24:15,190 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2940, now seen corresponding path program 1 times [2025-04-26 16:24:15,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:15,197 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941427767] [2025-04-26 16:24:15,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:15,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:24:15,244 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:24:15,244 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:15,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:15,245 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:15,246 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:24:15,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:24:15,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:15,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:15,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:15,264 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash 96388, now seen corresponding path program 1 times [2025-04-26 16:24:15,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:15,265 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326677802] [2025-04-26 16:24:15,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:15,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:15,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:24:15,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:24:15,274 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:15,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:15,275 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:15,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:24:15,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:24:15,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:15,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:15,283 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:15,287 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash 87652137, now seen corresponding path program 1 times [2025-04-26 16:24:15,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:15,288 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336984336] [2025-04-26 16:24:15,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:15,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:15,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:24:15,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:24:15,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:15,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:15,296 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:15,297 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:24:15,298 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:24:15,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:15,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:15,300 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:15,363 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:24:15,364 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:24:15,364 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:24:15,364 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:24:15,364 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:24:15,364 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:15,364 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:24:15,364 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:24:15,364 INFO L132 ssoRankerPreferences]: Filename of dumped script: c4-barrier-2t.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:24:15,364 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:24:15,365 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:24:15,377 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:24:15,432 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:24:15,432 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:24:15,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:15,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:15,437 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 16:24:15,438 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 16:24:15,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:24:15,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:24:15,461 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 16:24:15,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:15,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:15,464 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 16:24:15,467 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 16:24:15,469 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:24:15,469 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:24:15,564 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:24:15,568 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 16:24:15,569 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:24:15,569 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:24:15,569 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:24:15,569 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:24:15,569 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:24:15,569 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:15,569 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:24:15,569 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:24:15,569 INFO L132 ssoRankerPreferences]: Filename of dumped script: c4-barrier-2t.c.bpl_petrified1_Iteration1_Loop [2025-04-26 16:24:15,569 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:24:15,569 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:24:15,570 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:24:15,608 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:24:15,611 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:24:15,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:15,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:15,614 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 16:24:15,616 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 16:24:15,617 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 16:24:15,629 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:24:15,629 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:24:15,630 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:24:15,630 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:24:15,630 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:24:15,636 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:24:15,636 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:24:15,640 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:24:15,644 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:24:15,645 INFO L437 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:24:15,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:15,649 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 16:24:15,651 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 16:24:15,652 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:24:15,654 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:24:15,656 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 16:24:15,656 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:24:15,657 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:24:15,657 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z, x1, x4) = 1*z - 1*x1 - 1*x4 Supporting invariants [] [2025-04-26 16:24:15,663 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 16:24:15,666 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:24:15,693 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:15,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:24:15,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:24:15,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:15,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:24:15,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:24:15,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:24:15,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:24:15,719 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:24:15,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:15,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:24:15,720 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-26 16:24:15,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:24:15,778 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 16:24:15,837 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:24:15,839 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 101 states, but on-demand construction may add more states Second operand has 4 states, 4 states have (on average 1.25) internal successors, (in total 5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:24:15,994 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 101 states, but on-demand construction may add more states. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (in total 5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 239 states and 539 transitions. Complement of second has 6 states. [2025-04-26 16:24:15,996 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 16:24:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (in total 5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:24:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2025-04-26 16:24:16,006 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 51 transitions. Stem has 2 letters. Loop has 3 letters. [2025-04-26 16:24:16,006 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:16,006 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 51 transitions. Stem has 5 letters. Loop has 3 letters. [2025-04-26 16:24:16,007 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:16,007 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 51 transitions. Stem has 2 letters. Loop has 6 letters. [2025-04-26 16:24:16,007 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:16,007 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 239 states and 539 transitions. [2025-04-26 16:24:16,016 INFO L131 ngComponentsAnalysis]: Automaton has 23 accepting balls. 59 [2025-04-26 16:24:16,019 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 239 states to 152 states and 345 transitions. [2025-04-26 16:24:16,020 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 91 [2025-04-26 16:24:16,020 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 112 [2025-04-26 16:24:16,021 INFO L74 IsDeterministic]: Start isDeterministic. Operand 152 states and 345 transitions. [2025-04-26 16:24:16,021 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:24:16,021 INFO L218 hiAutomatonCegarLoop]: Abstraction has 152 states and 345 transitions. [2025-04-26 16:24:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states and 345 transitions. [2025-04-26 16:24:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2025-04-26 16:24:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 132 states have (on average 2.287878787878788) internal successors, (in total 302), 131 states have internal predecessors, (302), 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 16:24:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 302 transitions. [2025-04-26 16:24:16,054 INFO L240 hiAutomatonCegarLoop]: Abstraction has 132 states and 302 transitions. [2025-04-26 16:24:16,054 INFO L438 stractBuchiCegarLoop]: Abstraction has 132 states and 302 transitions. [2025-04-26 16:24:16,054 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:24:16,054 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 132 states and 302 transitions. [2025-04-26 16:24:16,056 INFO L131 ngComponentsAnalysis]: Automaton has 23 accepting balls. 59 [2025-04-26 16:24:16,056 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:24:16,056 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:24:16,056 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:24:16,056 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-04-26 16:24:16,060 INFO L752 eck$LassoCheckResult]: Stem: "[61] $Ultimate##0-->L13: Formula: (and (= v_x2_7 0) (= v_x5_5 0)) InVars {x5=v_x5_5, x2=v_x2_7} OutVars{x5=v_x5_5, x2=v_x2_7} AuxVars[] AssignedVars[]" "[88] L13-->L22: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[91] L13-1-->L39: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" [2025-04-26 16:24:16,060 INFO L754 eck$LassoCheckResult]: Loop: "[78] L39-->L41: Formula: (< v_x3_5 v_z_6) InVars {x3=v_x3_5, z=v_z_6} OutVars{x3=v_x3_5, z=v_z_6} AuxVars[] AssignedVars[]" "[80] L41-->L39: Formula: (= (+ v_x3_7 1) v_x3_6) InVars {x3=v_x3_7} OutVars{x3=v_x3_6} AuxVars[] AssignedVars[x3]" [2025-04-26 16:24:16,061 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash 91231, now seen corresponding path program 1 times [2025-04-26 16:24:16,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:16,061 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105925597] [2025-04-26 16:24:16,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:16,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:16,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:24:16,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:24:16,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,067 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:16,068 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:24:16,070 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:24:16,070 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,073 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:16,073 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash 3459, now seen corresponding path program 1 times [2025-04-26 16:24:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:16,073 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513670377] [2025-04-26 16:24:16,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:16,078 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:24:16,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:24:16,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,079 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:16,080 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:24:16,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:24:16,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,085 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:16,085 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,085 INFO L85 PathProgramCache]: Analyzing trace with hash 87675489, now seen corresponding path program 1 times [2025-04-26 16:24:16,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:16,086 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370161986] [2025-04-26 16:24:16,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:16,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:16,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:24:16,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:24:16,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,091 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:16,092 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:24:16,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:24:16,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,098 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:16,113 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:24:16,113 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:24:16,113 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:24:16,113 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:24:16,113 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:24:16,114 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,114 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:24:16,114 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:24:16,114 INFO L132 ssoRankerPreferences]: Filename of dumped script: c4-barrier-2t.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:24:16,114 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:24:16,114 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:24:16,114 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:24:16,132 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:24:16,132 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:24:16,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,134 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 16:24:16,136 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 16:24:16,137 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:24:16,138 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:24:16,155 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 16:24:16,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,157 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 16:24:16,159 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 16:24:16,160 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:24:16,160 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:24:16,229 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:24:16,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2025-04-26 16:24:16,233 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:24:16,234 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:24:16,234 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:24:16,234 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:24:16,234 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:24:16,234 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,234 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:24:16,234 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:24:16,234 INFO L132 ssoRankerPreferences]: Filename of dumped script: c4-barrier-2t.c.bpl_petrified1_Iteration2_Loop [2025-04-26 16:24:16,234 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:24:16,234 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:24:16,234 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:24:16,252 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:24:16,252 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:24:16,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,255 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 16:24:16,257 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 16:24:16,258 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 16:24:16,268 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:24:16,269 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:24:16,269 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:24:16,269 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:24:16,269 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:24:16,270 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:24:16,270 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:24:16,272 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:24:16,275 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:24:16,275 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:24:16,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,277 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 16:24:16,278 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 16:24:16,279 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:24:16,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2025-04-26 16:24:16,283 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:24:16,283 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:24:16,283 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(x3, z) = -1*x3 + 1*z Supporting invariants [] [2025-04-26 16:24:16,289 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 16:24:16,290 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:24:16,301 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:24:16,306 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:24:16,306 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:24:16,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:24:16,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:24:16,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:24:16,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:24:16,314 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:24:16,315 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:24:16,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:24:16,334 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 16:24:16,334 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 16:24:16,334 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 132 states and 302 transitions. cyclomatic complexity: 200 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (in total 5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:24:16,391 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 132 states and 302 transitions. cyclomatic complexity: 200. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (in total 5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 331 states and 811 transitions. Complement of second has 6 states. [2025-04-26 16:24:16,391 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 16:24:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (in total 5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:24:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2025-04-26 16:24:16,392 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 63 transitions. Stem has 3 letters. Loop has 2 letters. [2025-04-26 16:24:16,392 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:16,392 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 63 transitions. Stem has 5 letters. Loop has 2 letters. [2025-04-26 16:24:16,392 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:16,392 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 63 transitions. Stem has 3 letters. Loop has 4 letters. [2025-04-26 16:24:16,392 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:16,392 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 331 states and 811 transitions. [2025-04-26 16:24:16,397 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 43 [2025-04-26 16:24:16,398 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 331 states to 197 states and 467 transitions. [2025-04-26 16:24:16,398 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 96 [2025-04-26 16:24:16,399 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 116 [2025-04-26 16:24:16,399 INFO L74 IsDeterministic]: Start isDeterministic. Operand 197 states and 467 transitions. [2025-04-26 16:24:16,399 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:24:16,399 INFO L218 hiAutomatonCegarLoop]: Abstraction has 197 states and 467 transitions. [2025-04-26 16:24:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states and 467 transitions. [2025-04-26 16:24:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 177. [2025-04-26 16:24:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 177 states have (on average 2.406779661016949) internal successors, (in total 426), 176 states have internal predecessors, (426), 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 16:24:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 426 transitions. [2025-04-26 16:24:16,405 INFO L240 hiAutomatonCegarLoop]: Abstraction has 177 states and 426 transitions. [2025-04-26 16:24:16,406 INFO L438 stractBuchiCegarLoop]: Abstraction has 177 states and 426 transitions. [2025-04-26 16:24:16,406 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:24:16,406 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 177 states and 426 transitions. [2025-04-26 16:24:16,407 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 43 [2025-04-26 16:24:16,407 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:24:16,407 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:24:16,407 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2025-04-26 16:24:16,407 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2025-04-26 16:24:16,408 INFO L752 eck$LassoCheckResult]: Stem: "[61] $Ultimate##0-->L13: Formula: (and (= v_x2_7 0) (= v_x5_5 0)) InVars {x5=v_x5_5, x2=v_x2_7} OutVars{x5=v_x5_5, x2=v_x2_7} AuxVars[] AssignedVars[]" "[88] L13-->L22: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[66] L22-->L27: Formula: (<= v_z_3 (+ v_x4_4 v_x1_4)) InVars {x4=v_x4_4, x1=v_x1_4, z=v_z_3} OutVars{x4=v_x4_4, x1=v_x1_4, z=v_z_3} AuxVars[] AssignedVars[]" "[68] L27-->L28: Formula: (= v_x2_1 (+ v_x2_2 1)) InVars {x2=v_x2_2} OutVars{x2=v_x2_1} AuxVars[] AssignedVars[x2]" "[70] L28-->L29-1: Formula: (<= 2 v_x2_3) InVars {x2=v_x2_3} OutVars{x2=v_x2_3} AuxVars[] AssignedVars[]" [2025-04-26 16:24:16,408 INFO L754 eck$LassoCheckResult]: Loop: "[73] L29-1-->L31: Formula: (< (+ v_x5_2 v_x3_2) v_z_4) InVars {x5=v_x5_2, x3=v_x3_2, z=v_z_4} OutVars{x5=v_x5_2, x3=v_x3_2, z=v_z_4} AuxVars[] AssignedVars[]" "[75] L31-->L32: Formula: (= (+ v_x3_4 1) v_x3_3) InVars {x3=v_x3_4} OutVars{x3=v_x3_3} AuxVars[] AssignedVars[x3]" "[76] L32-->L29-1: Formula: (= v_x5_3 (+ v_x5_4 1)) InVars {x5=v_x5_4} OutVars{x5=v_x5_3} AuxVars[] AssignedVars[x5]" [2025-04-26 16:24:16,408 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash 87651144, now seen corresponding path program 1 times [2025-04-26 16:24:16,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:16,408 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089049551] [2025-04-26 16:24:16,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:16,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:16,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:24:16,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:24:16,413 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:24:16,455 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 16:24:16,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-26 16:24:16,456 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089049551] [2025-04-26 16:24:16,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089049551] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-26 16:24:16,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-26 16:24:16,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-26 16:24:16,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228495120] [2025-04-26 16:24:16,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-26 16:24:16,459 INFO L757 eck$LassoCheckResult]: stem already infeasible [2025-04-26 16:24:16,459 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 102345, now seen corresponding path program 1 times [2025-04-26 16:24:16,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:16,459 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920514041] [2025-04-26 16:24:16,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:16,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:16,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:24:16,464 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:24:16,464 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,464 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:16,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:24:16,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:24:16,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,467 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:16,489 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:24:16,489 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:24:16,489 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:24:16,489 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:24:16,489 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:24:16,489 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,489 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:24:16,489 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:24:16,489 INFO L132 ssoRankerPreferences]: Filename of dumped script: c4-barrier-2t.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:24:16,489 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:24:16,489 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:24:16,490 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:24:16,517 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:24:16,517 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:24:16,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,521 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 16:24:16,522 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 16:24:16,524 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:24:16,524 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:24:16,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2025-04-26 16:24:16,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,543 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 16:24:16,544 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 16:24:16,548 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:24:16,548 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:24:16,632 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:24:16,636 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 16:24:16,636 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:24:16,636 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:24:16,636 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:24:16,636 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:24:16,636 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:24:16,637 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,637 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:24:16,637 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:24:16,637 INFO L132 ssoRankerPreferences]: Filename of dumped script: c4-barrier-2t.c.bpl_petrified1_Iteration3_Loop [2025-04-26 16:24:16,637 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:24:16,637 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:24:16,637 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:24:16,658 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:24:16,658 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:24:16,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,660 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 16:24:16,660 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 16:24:16,670 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 16:24:16,680 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:24:16,681 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:24:16,681 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:24:16,681 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:24:16,681 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:24:16,682 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:24:16,682 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:24:16,684 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:24:16,686 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:24:16,686 INFO L437 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:24:16,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,687 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:24:16,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2025-04-26 16:24:16,692 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:24:16,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2025-04-26 16:24:16,696 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:24:16,696 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:24:16,697 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(x5, x3, z) = -1*x5 - 1*x3 + 1*z Supporting invariants [] [2025-04-26 16:24:16,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2025-04-26 16:24:16,703 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:24:16,717 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-26 16:24:16,722 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-26 16:24:16,723 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:24:16,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:24:16,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:24:16,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:24:16,733 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:24:16,733 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,733 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:24:16,735 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-26 16:24:16,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:24:16,768 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 16:24:16,769 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2025-04-26 16:24:16,769 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 177 states and 426 transitions. cyclomatic complexity: 281 Second operand has 4 states, 4 states have (on average 2.0) internal successors, (in total 8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:24:16,818 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 177 states and 426 transitions. cyclomatic complexity: 281. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (in total 8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 366 states and 924 transitions. Complement of second has 6 states. [2025-04-26 16:24:16,818 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 16:24:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (in total 8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:24:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-04-26 16:24:16,819 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 59 transitions. Stem has 5 letters. Loop has 3 letters. [2025-04-26 16:24:16,820 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:16,820 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 59 transitions. Stem has 8 letters. Loop has 3 letters. [2025-04-26 16:24:16,820 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:16,820 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 59 transitions. Stem has 5 letters. Loop has 6 letters. [2025-04-26 16:24:16,820 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:16,820 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 366 states and 924 transitions. [2025-04-26 16:24:16,823 INFO L131 ngComponentsAnalysis]: Automaton has 12 accepting balls. 24 [2025-04-26 16:24:16,826 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 366 states to 264 states and 677 transitions. [2025-04-26 16:24:16,826 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 92 [2025-04-26 16:24:16,826 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2025-04-26 16:24:16,826 INFO L74 IsDeterministic]: Start isDeterministic. Operand 264 states and 677 transitions. [2025-04-26 16:24:16,826 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:24:16,826 INFO L218 hiAutomatonCegarLoop]: Abstraction has 264 states and 677 transitions. [2025-04-26 16:24:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states and 677 transitions. [2025-04-26 16:24:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2025-04-26 16:24:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 230 states have (on average 2.617391304347826) internal successors, (in total 602), 229 states have internal predecessors, (602), 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 16:24:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 602 transitions. [2025-04-26 16:24:16,835 INFO L240 hiAutomatonCegarLoop]: Abstraction has 230 states and 602 transitions. [2025-04-26 16:24:16,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-26 16:24:16,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-26 16:24:16,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-26 16:24:16,839 INFO L87 Difference]: Start difference. First operand 230 states and 602 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (in total 5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:24:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-26 16:24:16,863 INFO L93 Difference]: Finished difference Result 92 states and 213 transitions. [2025-04-26 16:24:16,863 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 92 states and 213 transitions. [2025-04-26 16:24:16,864 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 14 [2025-04-26 16:24:16,865 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 92 states to 92 states and 213 transitions. [2025-04-26 16:24:16,865 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2025-04-26 16:24:16,865 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2025-04-26 16:24:16,865 INFO L74 IsDeterministic]: Start isDeterministic. Operand 92 states and 213 transitions. [2025-04-26 16:24:16,865 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:24:16,865 INFO L218 hiAutomatonCegarLoop]: Abstraction has 92 states and 213 transitions. [2025-04-26 16:24:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states and 213 transitions. [2025-04-26 16:24:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2025-04-26 16:24:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 92 states have (on average 2.3152173913043477) internal successors, (in total 213), 91 states have internal predecessors, (213), 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 16:24:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 213 transitions. [2025-04-26 16:24:16,869 INFO L240 hiAutomatonCegarLoop]: Abstraction has 92 states and 213 transitions. [2025-04-26 16:24:16,869 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-26 16:24:16,870 INFO L438 stractBuchiCegarLoop]: Abstraction has 92 states and 213 transitions. [2025-04-26 16:24:16,870 INFO L340 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2025-04-26 16:24:16,870 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 213 transitions. [2025-04-26 16:24:16,870 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 14 [2025-04-26 16:24:16,871 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:24:16,871 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:24:16,871 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:24:16,871 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2025-04-26 16:24:16,871 INFO L752 eck$LassoCheckResult]: Stem: "[61] $Ultimate##0-->L13: Formula: (and (= v_x2_7 0) (= v_x5_5 0)) InVars {x5=v_x5_5, x2=v_x2_7} OutVars{x5=v_x5_5, x2=v_x2_7} AuxVars[] AssignedVars[]" "[88] L13-->L22: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0]" "[66] L22-->L27: Formula: (<= v_z_3 (+ v_x4_4 v_x1_4)) InVars {x4=v_x4_4, x1=v_x1_4, z=v_z_3} OutVars{x4=v_x4_4, x1=v_x1_4, z=v_z_3} AuxVars[] AssignedVars[]" "[68] L27-->L28: Formula: (= v_x2_1 (+ v_x2_2 1)) InVars {x2=v_x2_2} OutVars{x2=v_x2_1} AuxVars[] AssignedVars[x2]" "[91] L13-1-->L39: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1]" "[77] L39-->L43: Formula: (<= v_z_7 v_x3_8) InVars {x3=v_x3_8, z=v_z_7} OutVars{x3=v_x3_8, z=v_z_7} AuxVars[] AssignedVars[]" "[79] L43-->L44: Formula: (= (+ v_x2_5 1) v_x2_4) InVars {x2=v_x2_5} OutVars{x2=v_x2_4} AuxVars[] AssignedVars[x2]" "[81] L44-->L45-1: Formula: (<= 2 v_x2_6) InVars {x2=v_x2_6} OutVars{x2=v_x2_6} AuxVars[] AssignedVars[]" [2025-04-26 16:24:16,871 INFO L754 eck$LassoCheckResult]: Loop: "[83] L45-1-->L47: Formula: (< v_x1_6 v_z_8) InVars {x1=v_x1_6, z=v_z_8} OutVars{x1=v_x1_6, z=v_z_8} AuxVars[] AssignedVars[]" "[85] L47-->L45-1: Formula: (= v_x1_7 (+ v_x1_8 1)) InVars {x1=v_x1_8} OutVars{x1=v_x1_7} AuxVars[] AssignedVars[x1]" [2025-04-26 16:24:16,871 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,871 INFO L85 PathProgramCache]: Analyzing trace with hash -124182926, now seen corresponding path program 1 times [2025-04-26 16:24:16,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:16,872 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077577440] [2025-04-26 16:24:16,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:16,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:16,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:24:16,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:24:16,876 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,876 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:16,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:24:16,880 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:24:16,880 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,881 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:16,881 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 3619, now seen corresponding path program 1 times [2025-04-26 16:24:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:16,885 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666703150] [2025-04-26 16:24:16,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:16,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:16,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:24:16,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:24:16,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,888 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:16,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:24:16,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:24:16,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:16,894 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash 919295060, now seen corresponding path program 1 times [2025-04-26 16:24:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:24:16,895 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971646366] [2025-04-26 16:24:16,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:24:16,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:24:16,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-26 16:24:16,902 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-26 16:24:16,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,903 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:24:16,907 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-26 16:24:16,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-26 16:24:16,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:16,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:24:16,911 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:24:16,927 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:24:16,927 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:24:16,927 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:24:16,927 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:24:16,927 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:24:16,927 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,927 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:24:16,927 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:24:16,927 INFO L132 ssoRankerPreferences]: Filename of dumped script: c4-barrier-2t.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:24:16,927 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:24:16,927 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:24:16,928 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:24:16,943 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:24:16,943 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:24:16,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,945 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:24:16,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2025-04-26 16:24:16,946 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:24:16,946 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:24:16,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2025-04-26 16:24:16,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:16,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:16,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:24:16,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2025-04-26 16:24:16,965 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:24:16,965 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:24:17,034 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:24:17,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2025-04-26 16:24:17,039 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:24:17,039 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:24:17,039 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:24:17,039 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:24:17,039 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:24:17,039 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:17,039 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:24:17,039 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:24:17,039 INFO L132 ssoRankerPreferences]: Filename of dumped script: c4-barrier-2t.c.bpl_petrified1_Iteration4_Loop [2025-04-26 16:24:17,039 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:24:17,039 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:24:17,041 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:24:17,063 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:24:17,063 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:24:17,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:17,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:17,065 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:24:17,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2025-04-26 16:24:17,068 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 16:24:17,078 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:24:17,078 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:24:17,078 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:24:17,078 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:24:17,078 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:24:17,079 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:24:17,079 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:24:17,081 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:24:17,085 INFO L436 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2025-04-26 16:24:17,085 INFO L437 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2025-04-26 16:24:17,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:24:17,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:24:17,087 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:24:17,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2025-04-26 16:24:17,089 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:24:17,092 ERROR L418 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Exception during sending of exit command (exit): Broken pipe [2025-04-26 16:24:17,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2025-04-26 16:24:17,093 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:24:17,093 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:24:17,093 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(z, x1) = 1*z - 1*x1 Supporting invariants [] [2025-04-26 16:24:17,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2025-04-26 16:24:17,100 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:24:17,111 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:24:17,114 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:24:17,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:24:17,116 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:17,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:24:17,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:24:17,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:24:17,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:24:17,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:24:17,128 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:24:17,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:24:17,128 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:24:17,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:24:17,140 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 16:24:17,140 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 16:24:17,140 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 213 transitions. cyclomatic complexity: 139 Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (in total 10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:24:17,176 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 213 transitions. cyclomatic complexity: 139. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (in total 10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 157 states and 370 transitions. Complement of second has 6 states. [2025-04-26 16:24:17,176 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 16:24:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (in total 10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:24:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2025-04-26 16:24:17,177 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 43 transitions. Stem has 8 letters. Loop has 2 letters. [2025-04-26 16:24:17,177 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:17,177 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 43 transitions. Stem has 10 letters. Loop has 2 letters. [2025-04-26 16:24:17,177 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:17,177 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 43 transitions. Stem has 8 letters. Loop has 4 letters. [2025-04-26 16:24:17,177 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:24:17,178 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 370 transitions. [2025-04-26 16:24:17,179 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:24:17,179 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 0 states and 0 transitions. [2025-04-26 16:24:17,179 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:24:17,179 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:24:17,179 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:24:17,179 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:24:17,179 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:24:17,179 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:24:17,179 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:24:17,179 INFO L340 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2025-04-26 16:24:17,179 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:24:17,179 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:24:17,179 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:24:17,184 INFO L201 PluginConnector]: Adding new model c4-barrier-2t.c.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:24:17 BoogieIcfgContainer [2025-04-26 16:24:17,184 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:24:17,185 INFO L158 Benchmark]: Toolchain (without parser) took 2440.94ms. Allocated memory was 163.6MB in the beginning and 155.2MB in the end (delta: -8.4MB). Free memory was 91.0MB in the beginning and 34.1MB in the end (delta: 56.9MB). Peak memory consumption was 47.6MB. Max. memory is 8.0GB. [2025-04-26 16:24:17,186 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.86ms. Allocated memory is still 163.6MB. Free memory was 91.9MB in the beginning and 91.7MB in the end (delta: 199.4kB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:24:17,186 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.54ms. Allocated memory is still 163.6MB. Free memory was 91.0MB in the beginning and 89.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:24:17,187 INFO L158 Benchmark]: Boogie Preprocessor took 29.23ms. Allocated memory is still 163.6MB. Free memory was 89.1MB in the beginning and 87.9MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-26 16:24:17,188 INFO L158 Benchmark]: RCFGBuilder took 182.88ms. Allocated memory is still 163.6MB. Free memory was 87.9MB in the beginning and 78.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-26 16:24:17,188 INFO L158 Benchmark]: BuchiAutomizer took 2183.90ms. Allocated memory was 163.6MB in the beginning and 155.2MB in the end (delta: -8.4MB). Free memory was 78.1MB in the beginning and 34.1MB in the end (delta: 44.1MB). Peak memory consumption was 35.0MB. Max. memory is 8.0GB. [2025-04-26 16:24:17,190 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.86ms. Allocated memory is still 163.6MB. Free memory was 91.9MB in the beginning and 91.7MB in the end (delta: 199.4kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.54ms. Allocated memory is still 163.6MB. Free memory was 91.0MB in the beginning and 89.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 29.23ms. Allocated memory is still 163.6MB. Free memory was 89.1MB in the beginning and 87.9MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 182.88ms. Allocated memory is still 163.6MB. Free memory was 87.9MB in the beginning and 78.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 2183.90ms. Allocated memory was 163.6MB in the beginning and 155.2MB in the end (delta: -8.4MB). Free memory was 78.1MB in the beginning and 34.1MB in the end (delta: 44.1MB). Peak memory consumption was 35.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.0s and 5 iterations. TraceHistogramMax:1. Analysis of lassos took 1.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 74 StatesRemovedByMinimization, 3 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 [4, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 166 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 162 mSDsluCounter, 207 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 97 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 180 IncrementalHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 110 mSDtfsCounter, 180 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq158 hnf93 smp100 dnf100 smp100 tf109 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 45ms VariablesStem: 0 VariablesLoop: 5 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s InitialAbstractionConstructionTime: 0.0s InitialAbstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (1 trivial, 4 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * x4 + -1 * x1 + z and consists of 4 locations. One deterministic module has affine ranking function -1 * x3 + z and consists of 4 locations. One deterministic module has affine ranking function -1 * x5 + -1 * x3 + z and consists of 4 locations. One deterministic module has affine ranking function -1 * x1 + z and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2025-04-26 16:24:17,202 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...