/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:20:36,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:20:36,497 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2025-04-26 16:20:36,502 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:20:36,502 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:20:36,525 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:20:36,525 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:20:36,525 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:20:36,526 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:20:36,526 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:20:36,527 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:20:36,527 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:20:36,527 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:20:36,527 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:20:36,527 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:20:36,527 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:20:36,527 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:20:36,527 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:20:36,527 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:20:36,528 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:20:36,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:20:36,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:20:36,529 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:20:36,529 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:20:36,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:20:36,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:20:36,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:20:36,757 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2025-04-26 16:20:36,758 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2025-04-26 16:20:36,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2025-04-26 16:20:36,760 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2025-04-26 16:20:36,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:20:36,776 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2025-04-26 16:20:36,777 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:20:36,777 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:20:36,777 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:20:36,784 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,799 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,803 INFO L138 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2025-04-26 16:20:36,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:20:36,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:20:36,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:20:36,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:20:36,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,810 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,811 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,813 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,814 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,819 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:20:36,819 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:20:36,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:20:36,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:20:36,820 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/1) ... [2025-04-26 16:20:36,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:36,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:36,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:36,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2025-04-26 16:20:36,873 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2025-04-26 16:20:36,874 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2025-04-26 16:20:36,874 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2025-04-26 16:20:36,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:20:36,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:20:36,875 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-26 16:20:36,906 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:20:36,908 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:20:36,974 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:20:36,974 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:20:36,982 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:20:36,982 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-26 16:20:36,983 INFO L201 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:20:36 BoogieIcfgContainer [2025-04-26 16:20:36,983 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:20:36,984 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:20:36,984 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:20:36,989 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:20:36,990 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:20:36,990 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.04 04:20:36" (1/2) ... [2025-04-26 16:20:36,991 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@147246db and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:20:36, skipping insertion in model container [2025-04-26 16:20:36,991 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:20:36,991 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:20:36" (2/2) ... [2025-04-26 16:20:36,992 INFO L376 chiAutomizerObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2025-04-26 16:20:37,030 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2025-04-26 16:20:37,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 18 places, 17 transitions, 41 flow [2025-04-26 16:20:37,083 INFO L116 PetriNetUnfolderBase]: 2/15 cut-off events. [2025-04-26 16:20:37,085 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-26 16:20:37,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 15 events. 2/15 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 5. Up to 2 conditions per place. [2025-04-26 16:20:37,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 17 transitions, 41 flow [2025-04-26 16:20:37,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 15 transitions, 36 flow [2025-04-26 16:20:37,091 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 17 places, 15 transitions, 36 flow [2025-04-26 16:20:37,103 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:20:37,103 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:20:37,103 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:20:37,104 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:20:37,104 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:20:37,104 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:20:37,104 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:20:37,104 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:20:37,105 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2025-04-26 16:20:37,122 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2025-04-26 16:20:37,122 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:20:37,122 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:20:37,125 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:20:37,125 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:20:37,125 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:20:37,125 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 15 states, but on-demand construction may add more states [2025-04-26 16:20:37,126 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2025-04-26 16:20:37,126 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:20:37,126 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:20:37,126 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2025-04-26 16:20:37,126 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:20:37,130 INFO L752 eck$LassoCheckResult]: Stem: "[32] $Ultimate##0-->L18: Formula: (= v_ULTIMATE.start_res_1 0) InVars {} OutVars{ULTIMATE.start_res=v_ULTIMATE.start_res_1} AuxVars[] AssignedVars[ULTIMATE.start_res]" "[30] L18-->L20-1: Formula: (= 0 v_ULTIMATE.start_x_1) InVars {} OutVars{ULTIMATE.start_x=v_ULTIMATE.start_x_1} AuxVars[] AssignedVars[ULTIMATE.start_x]" [2025-04-26 16:20:37,133 INFO L754 eck$LassoCheckResult]: Loop: "[35] L20-1-->L21: Formula: (< v_ULTIMATE.start_x_2 3) InVars {ULTIMATE.start_x=v_ULTIMATE.start_x_2} OutVars{ULTIMATE.start_x=v_ULTIMATE.start_x_2} AuxVars[] AssignedVars[]" "[42] L21-->$Ultimate##0: Formula: (= v_fooThread1of1ForFork0_thidvar0_2 v_ULTIMATE.start_x_9) InVars {ULTIMATE.start_x=v_ULTIMATE.start_x_9} OutVars{fooThread1of1ForFork0_thidvar0=v_fooThread1of1ForFork0_thidvar0_2, fooThread1of1ForFork0_y=v_fooThread1of1ForFork0_y_4, ULTIMATE.start_x=v_ULTIMATE.start_x_9, fooThread1of1ForFork0_res=v_fooThread1of1ForFork0_res_4} AuxVars[] AssignedVars[fooThread1of1ForFork0_thidvar0, fooThread1of1ForFork0_y, fooThread1of1ForFork0_res]" "[38] $Ultimate##0-->fooFINAL: Formula: (= v_fooThread1of1ForFork0_y_1 v_fooThread1of1ForFork0_res_1) InVars {fooThread1of1ForFork0_y=v_fooThread1of1ForFork0_y_1} OutVars{fooThread1of1ForFork0_res=v_fooThread1of1ForFork0_res_1, fooThread1of1ForFork0_y=v_fooThread1of1ForFork0_y_1} AuxVars[] AssignedVars[fooThread1of1ForFork0_res]" "[36] L21-1-->L23: Formula: (= v_ULTIMATE.start_resOld_1 v_ULTIMATE.start_res_2) InVars {ULTIMATE.start_res=v_ULTIMATE.start_res_2} OutVars{ULTIMATE.start_resOld=v_ULTIMATE.start_resOld_1, ULTIMATE.start_res=v_ULTIMATE.start_res_2} AuxVars[] AssignedVars[ULTIMATE.start_resOld]" "[39] fooFINAL-->fooEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[43] fooEXIT-->L23-1: Formula: (and (= v_fooThread1of1ForFork0_res_6 v_ULTIMATE.start_res_6) (= v_fooThread1of1ForFork0_thidvar0_4 v_ULTIMATE.start_x_11)) InVars {fooThread1of1ForFork0_thidvar0=v_fooThread1of1ForFork0_thidvar0_4, ULTIMATE.start_x=v_ULTIMATE.start_x_11, fooThread1of1ForFork0_res=v_fooThread1of1ForFork0_res_6} OutVars{fooThread1of1ForFork0_thidvar0=v_fooThread1of1ForFork0_thidvar0_4, ULTIMATE.start_x=v_ULTIMATE.start_x_11, ULTIMATE.start_res=v_ULTIMATE.start_res_6, fooThread1of1ForFork0_res=v_fooThread1of1ForFork0_res_6} AuxVars[] AssignedVars[ULTIMATE.start_res]" "[27] L23-1-->L24-1: Formula: (<= v_ULTIMATE.start_x_4 0) InVars {ULTIMATE.start_x=v_ULTIMATE.start_x_4} OutVars{ULTIMATE.start_x=v_ULTIMATE.start_x_4} AuxVars[] AssignedVars[]" "[28] L24-1-->L20-1: Formula: (= (+ 1 v_ULTIMATE.start_x_6) v_ULTIMATE.start_x_5) InVars {ULTIMATE.start_x=v_ULTIMATE.start_x_6} OutVars{ULTIMATE.start_x=v_ULTIMATE.start_x_5} AuxVars[] AssignedVars[ULTIMATE.start_x]" [2025-04-26 16:20:37,136 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:37,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1983, now seen corresponding path program 1 times [2025-04-26 16:20:37,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:37,142 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135090064] [2025-04-26 16:20:37,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:37,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:37,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:20:37,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:20:37,185 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,185 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:37,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:20:37,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:20:37,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,197 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:37,201 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1195827413, now seen corresponding path program 1 times [2025-04-26 16:20:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:37,201 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622501840] [2025-04-26 16:20:37,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:37,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:37,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:20:37,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:20:37,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,211 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:37,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:20:37,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:20:37,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:37,217 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:37,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1567848215, now seen corresponding path program 1 times [2025-04-26 16:20:37,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:37,217 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702963077] [2025-04-26 16:20:37,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:37,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:37,220 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-26 16:20:37,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-26 16:20:37,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,223 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:37,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-26 16:20:37,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-26 16:20:37,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,229 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:37,317 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:20:37,317 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:20:37,317 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:20:37,317 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:20:37,317 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:20:37,317 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:37,318 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:20:37,318 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:20:37,318 INFO L132 ssoRankerPreferences]: Filename of dumped script: fork_unchanged_local_variables2.bpl_petrified1_Iteration1_Loop [2025-04-26 16:20:37,318 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:20:37,318 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:20:37,327 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:37,342 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:37,412 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:20:37,412 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:20:37,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:37,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:37,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:37,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2025-04-26 16:20:37,419 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:20:37,419 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:37,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2025-04-26 16:20:37,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:37,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:37,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:37,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2025-04-26 16:20:37,447 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:20:37,447 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:37,474 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:20:37,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2025-04-26 16:20:37,479 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:20:37,479 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:20:37,479 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:20:37,479 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:20:37,479 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:20:37,479 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:37,479 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:20:37,479 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:20:37,479 INFO L132 ssoRankerPreferences]: Filename of dumped script: fork_unchanged_local_variables2.bpl_petrified1_Iteration1_Loop [2025-04-26 16:20:37,479 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:20:37,479 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:20:37,481 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:37,491 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:37,549 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:20:37,552 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:20:37,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:37,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:37,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:37,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2025-04-26 16:20:37,562 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2025-04-26 16:20:37,572 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:20:37,572 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:20:37,573 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:20:37,573 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:20:37,573 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:20:37,577 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:20:37,577 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:20:37,580 INFO L490 LassoAnalysis]: Proving termination failed for this template and these settings. [2025-04-26 16:20:37,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2025-04-26 16:20:37,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:37,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:37,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2025-04-26 16:20:37,590 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2025-04-26 16:20:37,600 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:20:37,600 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:20:37,600 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:20:37,600 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:20:37,600 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:20:37,602 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:20:37,602 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:20:37,604 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:20:37,609 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:20:37,609 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:20:37,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:37,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:37,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2025-04-26 16:20:37,615 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:20:37,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2025-04-26 16:20:37,621 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:20:37,621 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:20:37,626 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_x) = -2*ULTIMATE.start_x + 1 Supporting invariants [] [2025-04-26 16:20:37,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2025-04-26 16:20:37,634 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:20:37,660 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:37,667 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-26 16:20:37,668 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-26 16:20:37,668 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:20:37,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:20:37,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:20:37,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-26 16:20:37,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-26 16:20:37,680 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:20:37,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:20:37,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:20:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-26 16:20:37,760 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2025-04-26 16:20:37,764 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 15 states, but on-demand construction may add more states Second operand has 4 states, 4 states have (on average 2.5) internal successors, (in total 10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:20:37,824 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 15 states, but on-demand construction may add more states. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (in total 10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) Result 36 states and 47 transitions. Complement of second has 6 states. [2025-04-26 16:20:37,830 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:20:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.5) internal successors, (in total 10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:20:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2025-04-26 16:20:37,846 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 2 letters. Loop has 8 letters. [2025-04-26 16:20:37,858 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:37,858 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 10 letters. Loop has 8 letters. [2025-04-26 16:20:37,859 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:37,859 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 2 letters. Loop has 16 letters. [2025-04-26 16:20:37,859 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:37,860 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 47 transitions. [2025-04-26 16:20:37,861 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2025-04-26 16:20:37,864 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 28 states and 35 transitions. [2025-04-26 16:20:37,865 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2025-04-26 16:20:37,865 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2025-04-26 16:20:37,866 INFO L74 IsDeterministic]: Start isDeterministic. Operand 28 states and 35 transitions. [2025-04-26 16:20:37,866 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2025-04-26 16:20:37,866 INFO L218 hiAutomatonCegarLoop]: Abstraction has 28 states and 35 transitions. [2025-04-26 16:20:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 35 transitions. [2025-04-26 16:20:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2025-04-26 16:20:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (in total 34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:20:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-04-26 16:20:37,882 INFO L240 hiAutomatonCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-04-26 16:20:37,882 INFO L438 stractBuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-04-26 16:20:37,882 INFO L340 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2025-04-26 16:20:37,882 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 34 transitions. [2025-04-26 16:20:37,883 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2025-04-26 16:20:37,883 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:20:37,883 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:20:37,883 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2025-04-26 16:20:37,883 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:20:37,884 INFO L752 eck$LassoCheckResult]: Stem: "[32] $Ultimate##0-->L18: Formula: (= v_ULTIMATE.start_res_1 0) InVars {} OutVars{ULTIMATE.start_res=v_ULTIMATE.start_res_1} AuxVars[] AssignedVars[ULTIMATE.start_res]" "[30] L18-->L20-1: Formula: (= 0 v_ULTIMATE.start_x_1) InVars {} OutVars{ULTIMATE.start_x=v_ULTIMATE.start_x_1} AuxVars[] AssignedVars[ULTIMATE.start_x]" "[35] L20-1-->L21: Formula: (< v_ULTIMATE.start_x_2 3) InVars {ULTIMATE.start_x=v_ULTIMATE.start_x_2} OutVars{ULTIMATE.start_x=v_ULTIMATE.start_x_2} AuxVars[] AssignedVars[]" [2025-04-26 16:20:37,884 INFO L754 eck$LassoCheckResult]: Loop: "[42] L21-->$Ultimate##0: Formula: (= v_fooThread1of1ForFork0_thidvar0_2 v_ULTIMATE.start_x_9) InVars {ULTIMATE.start_x=v_ULTIMATE.start_x_9} OutVars{fooThread1of1ForFork0_thidvar0=v_fooThread1of1ForFork0_thidvar0_2, fooThread1of1ForFork0_y=v_fooThread1of1ForFork0_y_4, ULTIMATE.start_x=v_ULTIMATE.start_x_9, fooThread1of1ForFork0_res=v_fooThread1of1ForFork0_res_4} AuxVars[] AssignedVars[fooThread1of1ForFork0_thidvar0, fooThread1of1ForFork0_y, fooThread1of1ForFork0_res]" "[38] $Ultimate##0-->fooFINAL: Formula: (= v_fooThread1of1ForFork0_y_1 v_fooThread1of1ForFork0_res_1) InVars {fooThread1of1ForFork0_y=v_fooThread1of1ForFork0_y_1} OutVars{fooThread1of1ForFork0_res=v_fooThread1of1ForFork0_res_1, fooThread1of1ForFork0_y=v_fooThread1of1ForFork0_y_1} AuxVars[] AssignedVars[fooThread1of1ForFork0_res]" "[36] L21-1-->L23: Formula: (= v_ULTIMATE.start_resOld_1 v_ULTIMATE.start_res_2) InVars {ULTIMATE.start_res=v_ULTIMATE.start_res_2} OutVars{ULTIMATE.start_resOld=v_ULTIMATE.start_resOld_1, ULTIMATE.start_res=v_ULTIMATE.start_res_2} AuxVars[] AssignedVars[ULTIMATE.start_resOld]" "[39] fooFINAL-->fooEXIT: Formula: true InVars {} OutVars{} AuxVars[] AssignedVars[]" "[43] fooEXIT-->L23-1: Formula: (and (= v_fooThread1of1ForFork0_res_6 v_ULTIMATE.start_res_6) (= v_fooThread1of1ForFork0_thidvar0_4 v_ULTIMATE.start_x_11)) InVars {fooThread1of1ForFork0_thidvar0=v_fooThread1of1ForFork0_thidvar0_4, ULTIMATE.start_x=v_ULTIMATE.start_x_11, fooThread1of1ForFork0_res=v_fooThread1of1ForFork0_res_6} OutVars{fooThread1of1ForFork0_thidvar0=v_fooThread1of1ForFork0_thidvar0_4, ULTIMATE.start_x=v_ULTIMATE.start_x_11, ULTIMATE.start_res=v_ULTIMATE.start_res_6, fooThread1of1ForFork0_res=v_fooThread1of1ForFork0_res_6} AuxVars[] AssignedVars[ULTIMATE.start_res]" "[26] L23-1-->L25: Formula: (< 0 v_ULTIMATE.start_x_3) InVars {ULTIMATE.start_x=v_ULTIMATE.start_x_3} OutVars{ULTIMATE.start_x=v_ULTIMATE.start_x_3} AuxVars[] AssignedVars[]" "[25] L25-->L24-1: Formula: (= v_ULTIMATE.start_resOld_3 v_ULTIMATE.start_res_4) InVars {ULTIMATE.start_resOld=v_ULTIMATE.start_resOld_3, ULTIMATE.start_res=v_ULTIMATE.start_res_4} OutVars{ULTIMATE.start_resOld=v_ULTIMATE.start_resOld_3, ULTIMATE.start_res=v_ULTIMATE.start_res_4} AuxVars[] AssignedVars[]" "[28] L24-1-->L20-1: Formula: (= (+ 1 v_ULTIMATE.start_x_6) v_ULTIMATE.start_x_5) InVars {ULTIMATE.start_x=v_ULTIMATE.start_x_6} OutVars{ULTIMATE.start_x=v_ULTIMATE.start_x_5} AuxVars[] AssignedVars[ULTIMATE.start_x]" "[35] L20-1-->L21: Formula: (< v_ULTIMATE.start_x_2 3) InVars {ULTIMATE.start_x=v_ULTIMATE.start_x_2} OutVars{ULTIMATE.start_x=v_ULTIMATE.start_x_2} AuxVars[] AssignedVars[]" [2025-04-26 16:20:37,884 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash 61508, now seen corresponding path program 1 times [2025-04-26 16:20:37,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:37,885 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824967048] [2025-04-26 16:20:37,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:37,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:37,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:20:37,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:20:37,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,888 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:37,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:20:37,889 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:20:37,889 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,890 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:37,890 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1749535601, now seen corresponding path program 1 times [2025-04-26 16:20:37,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:37,890 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660419693] [2025-04-26 16:20:37,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:37,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:37,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-26 16:20:37,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-26 16:20:37,895 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,895 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-26 16:20:37,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-26 16:20:37,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-26 16:20:37,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-26 16:20:37,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-26 16:20:37,898 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:37,899 INFO L85 PathProgramCache]: Analyzing trace with hash 831354510, now seen corresponding path program 1 times [2025-04-26 16:20:37,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-26 16:20:37,899 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720016057] [2025-04-26 16:20:37,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-26 16:20:37,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-26 16:20:37,902 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-26 16:20:37,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-26 16:20:37,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:37,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:20:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-26 16:20:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-26 16:20:37,941 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720016057] [2025-04-26 16:20:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720016057] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-26 16:20:37,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-26 16:20:37,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-26 16:20:37,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698669790] [2025-04-26 16:20:37,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-26 16:20:37,987 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:20:37,987 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:20:37,987 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:20:37,987 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:20:37,987 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2025-04-26 16:20:37,987 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:37,987 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:20:37,988 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:20:37,988 INFO L132 ssoRankerPreferences]: Filename of dumped script: fork_unchanged_local_variables2.bpl_petrified1_Iteration2_Loop [2025-04-26 16:20:37,988 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:20:37,988 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:20:37,988 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:37,996 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:38,058 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:20:38,058 INFO L367 LassoAnalysis]: Checking for nontermination... [2025-04-26 16:20:38,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:38,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:38,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2025-04-26 16:20:38,063 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:20:38,063 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:38,085 INFO L400 LassoAnalysis]: Proved nontermination for one component. [2025-04-26 16:20:38,085 INFO L403 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fooThread1of1ForFork0_y=-8, ULTIMATE.start_resOld=-8, ULTIMATE.start_res=-8, fooThread1of1ForFork0_res=-8} Honda state: {fooThread1of1ForFork0_y=-8, ULTIMATE.start_resOld=-8, ULTIMATE.start_res=-8, fooThread1of1ForFork0_res=-8} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2025-04-26 16:20:38,091 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 16:20:38,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:38,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:38,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:38,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2025-04-26 16:20:38,099 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2025-04-26 16:20:38,099 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:38,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2025-04-26 16:20:38,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:38,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:38,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:38,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2025-04-26 16:20:38,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2025-04-26 16:20:38,121 INFO L160 nArgumentSynthesizer]: Using integer mode. [2025-04-26 16:20:38,152 INFO L407 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2025-04-26 16:20:38,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2025-04-26 16:20:38,156 INFO L206 LassoAnalysis]: Preferences: [2025-04-26 16:20:38,156 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2025-04-26 16:20:38,156 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2025-04-26 16:20:38,156 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2025-04-26 16:20:38,156 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2025-04-26 16:20:38,156 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:38,156 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2025-04-26 16:20:38,156 INFO L131 ssoRankerPreferences]: Path of dumped script: [2025-04-26 16:20:38,156 INFO L132 ssoRankerPreferences]: Filename of dumped script: fork_unchanged_local_variables2.bpl_petrified1_Iteration2_Loop [2025-04-26 16:20:38,156 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2025-04-26 16:20:38,156 INFO L243 LassoAnalysis]: Starting lasso preprocessing... [2025-04-26 16:20:38,157 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:38,164 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2025-04-26 16:20:38,220 INFO L261 LassoAnalysis]: Preprocessing complete. [2025-04-26 16:20:38,220 INFO L453 LassoAnalysis]: Using template 'affine'. [2025-04-26 16:20:38,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:38,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:38,223 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:38,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2025-04-26 16:20:38,226 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2025-04-26 16:20:38,235 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2025-04-26 16:20:38,235 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2025-04-26 16:20:38,236 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2025-04-26 16:20:38,236 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2025-04-26 16:20:38,236 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2025-04-26 16:20:38,237 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2025-04-26 16:20:38,237 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2025-04-26 16:20:38,240 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2025-04-26 16:20:38,243 INFO L436 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2025-04-26 16:20:38,243 INFO L437 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2025-04-26 16:20:38,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:20:38,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:20:38,245 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:20:38,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2025-04-26 16:20:38,247 INFO L436 nArgumentSynthesizer]: Simplifying supporting invariants... [2025-04-26 16:20:38,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2025-04-26 16:20:38,250 INFO L439 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2025-04-26 16:20:38,250 INFO L476 LassoAnalysis]: Proved termination. [2025-04-26 16:20:38,251 INFO L478 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_x) = -2*ULTIMATE.start_x + 3 Supporting invariants [] [2025-04-26 16:20:38,256 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 16:20:38,257 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2025-04-26 16:20:38,274 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-26 16:20:38,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-04-26 16:20:38,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-04-26 16:20:38,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:38,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:20:38,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-26 16:20:38,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:20:38,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-26 16:20:38,287 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-26 16:20:38,287 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-26 16:20:38,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-26 16:20:38,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-26 16:20:38,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-26 16:20:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-26 16:20:38,332 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2025-04-26 16:20:38,333 INFO L70 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states and 34 transitions. cyclomatic complexity: 9 Second operand has 4 states, 4 states have (on average 3.0) internal successors, (in total 12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:20:38,359 INFO L74 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states and 34 transitions. cyclomatic complexity: 9. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (in total 12), 4 states have internal predecessors, (12), 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 50 states and 62 transitions. Complement of second has 6 states. [2025-04-26 16:20:38,360 INFO L140 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2025-04-26 16:20:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (in total 12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:20:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2025-04-26 16:20:38,361 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 3 letters. Loop has 9 letters. [2025-04-26 16:20:38,361 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:38,361 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 12 letters. Loop has 9 letters. [2025-04-26 16:20:38,361 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:38,361 INFO L85 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 3 letters. Loop has 18 letters. [2025-04-26 16:20:38,361 INFO L117 BuchiAccepts]: Finished buchiAccepts. [2025-04-26 16:20:38,361 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 62 transitions. [2025-04-26 16:20:38,362 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:20:38,362 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 0 states and 0 transitions. [2025-04-26 16:20:38,362 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:20:38,362 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:20:38,362 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:20:38,363 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:20:38,363 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:20:38,363 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:20:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-26 16:20:38,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-26 16:20:38,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-26 16:20:38,367 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (in total 12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (in total 0), 0 states have return successors, (0), 0 states have call predecessors, ( in total0), 0 states have call successors, (0) [2025-04-26 16:20:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-26 16:20:38,368 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2025-04-26 16:20:38,368 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2025-04-26 16:20:38,368 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:20:38,368 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2025-04-26 16:20:38,368 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2025-04-26 16:20:38,368 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2025-04-26 16:20:38,368 INFO L74 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2025-04-26 16:20:38,368 INFO L81 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2025-04-26 16:20:38,369 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:20:38,369 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:20:38,369 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-26 16:20:38,370 INFO L438 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-26 16:20:38,370 INFO L340 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2025-04-26 16:20:38,370 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2025-04-26 16:20:38,370 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2025-04-26 16:20:38,370 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2025-04-26 16:20:38,376 INFO L201 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.04 04:20:38 BoogieIcfgContainer [2025-04-26 16:20:38,376 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2025-04-26 16:20:38,377 INFO L158 Benchmark]: Toolchain (without parser) took 1600.95ms. Allocated memory was 155.2MB in the beginning and 125.8MB in the end (delta: -29.4MB). Free memory was 83.9MB in the beginning and 61.2MB in the end (delta: 22.7MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:20:38,377 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.88ms. Allocated memory is still 155.2MB. Free memory is still 84.9MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:20:38,377 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.98ms. Allocated memory is still 155.2MB. Free memory was 83.9MB in the beginning and 81.4MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:20:38,378 INFO L158 Benchmark]: Boogie Preprocessor took 13.94ms. Allocated memory is still 155.2MB. Free memory was 81.4MB in the beginning and 80.3MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-26 16:20:38,378 INFO L158 Benchmark]: RCFGBuilder took 163.54ms. Allocated memory is still 155.2MB. Free memory was 80.3MB in the beginning and 71.6MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-26 16:20:38,378 INFO L158 Benchmark]: BuchiAutomizer took 1392.21ms. Allocated memory was 155.2MB in the beginning and 125.8MB in the end (delta: -29.4MB). Free memory was 71.6MB in the beginning and 61.2MB in the end (delta: 10.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-26 16:20:38,379 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 0.88ms. Allocated memory is still 155.2MB. Free memory is still 84.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.98ms. Allocated memory is still 155.2MB. Free memory was 83.9MB in the beginning and 81.4MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 13.94ms. Allocated memory is still 155.2MB. Free memory was 81.4MB in the beginning and 80.3MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 163.54ms. Allocated memory is still 155.2MB. Free memory was 80.3MB in the beginning and 71.6MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 1392.21ms. Allocated memory was 155.2MB in the beginning and 125.8MB in the end (delta: -29.4MB). Free memory was 71.6MB in the beginning and 61.2MB in the end (delta: 10.4MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.3s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 0.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 35 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35 IncrementalHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 15 mSDtfsCounter, 35 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital25 mio100 ax100 hnf100 lsp58 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq182 hnf88 smp100 dnf100 smp100 tf108 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 27ms VariablesStem: 0 VariablesLoop: 5 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s InitialAbstractionConstructionTime: 0.0s InitialAbstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function 1 + -2 * x and consists of 4 locations. One deterministic module has affine ranking function 3 + -2 * x and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2025-04-26 16:20:38,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...