/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/BuchiAutomizerBplInline.xml -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-buchi-pn-semanticLbe.epf -i ../../../trunk/examples/concurrent/bpl/loop-lockstep-example.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.fs.omega-petrinet-638c691-m [2022-09-29 15:02:36,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-29 15:02:36,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-29 15:02:36,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-09-29 15:02:36,315 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-buchi-pn-semanticLbe.epf [2022-09-29 15:02:36,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-29 15:02:36,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-29 15:02:36,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-09-29 15:02:36,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-09-29 15:02:36,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-29 15:02:36,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-29 15:02:36,341 INFO L138 SettingsManager]: * Use SBE=true [2022-09-29 15:02:36,341 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-09-29 15:02:36,341 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-09-29 15:02:36,341 INFO L138 SettingsManager]: * Use old map elimination=false [2022-09-29 15:02:36,342 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-09-29 15:02:36,342 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-09-29 15:02:36,342 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-09-29 15:02:36,342 INFO L138 SettingsManager]: * Automaton type for concurrent programs=BUCHI_PETRI_NET [2022-09-29 15:02:36,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-29 15:02:36,342 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-29 15:02:36,342 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-09-29 15:02:36,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-29 15:02:36,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-29 15:02:36,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-29 15:02:36,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-09-29 15:02:36,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-09-29 15:02:36,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-09-29 15:02:36,343 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-29 15:02:36,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-29 15:02:36,343 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-09-29 15:02:36,343 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-29 15:02:36,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-09-29 15:02:36,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-29 15:02:36,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-29 15:02:36,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-29 15:02:36,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-29 15:02:36,345 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-09-29 15:02:36,346 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-29 15:02:36,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-29 15:02:36,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-29 15:02:36,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-29 15:02:36,547 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-09-29 15:02:36,548 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-09-29 15:02:36,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/loop-lockstep-example.bpl [2022-09-29 15:02:36,549 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/loop-lockstep-example.bpl' [2022-09-29 15:02:36,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-29 15:02:36,568 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-09-29 15:02:36,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-29 15:02:36,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-29 15:02:36,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-29 15:02:36,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,595 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-09-29 15:02:36,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-29 15:02:36,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-29 15:02:36,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-29 15:02:36,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-29 15:02:36,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-29 15:02:36,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-29 15:02:36,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-29 15:02:36,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-29 15:02:36,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/1) ... [2022-09-29 15:02:36,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:36,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:36,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:36,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-09-29 15:02:36,698 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-09-29 15:02:36,698 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-29 15:02:36,698 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-29 15:02:36,699 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-09-29 15:02:36,699 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-29 15:02:36,699 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-29 15:02:36,699 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-09-29 15:02:36,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-29 15:02:36,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-29 15:02:36,700 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-29 15:02:36,750 INFO L234 CfgBuilder]: Building ICFG [2022-09-29 15:02:36,752 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-29 15:02:36,815 INFO L275 CfgBuilder]: Performing block encoding [2022-09-29 15:02:36,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-29 15:02:36,820 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-09-29 15:02:36,821 INFO L202 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 03:02:36 BoogieIcfgContainer [2022-09-29 15:02:36,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-29 15:02:36,822 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-09-29 15:02:36,822 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-09-29 15:02:36,824 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-09-29 15:02:36,824 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-09-29 15:02:36,825 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 03:02:36" (1/2) ... [2022-09-29 15:02:36,825 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@15619c87 and model type loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.09 03:02:36, skipping insertion in model container [2022-09-29 15:02:36,825 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-09-29 15:02:36,826 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 03:02:36" (2/2) ... [2022-09-29 15:02:36,826 INFO L322 chiAutomizerObserver]: Analyzing ICFG loop-lockstep-example.bpl [2022-09-29 15:02:36,874 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-29 15:02:36,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 70 flow [2022-09-29 15:02:36,923 INFO L175 PetriNetUnfolderBase]: Searched whole Unfolding. [2022-09-29 15:02:36,923 INFO L123 PetriNetUnfolderBase]: 2/23 cut-off events. [2022-09-29 15:02:36,924 INFO L124 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2022-09-29 15:02:36,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 2/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2022-09-29 15:02:36,926 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 70 flow [2022-09-29 15:02:36,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2022-09-29 15:02:36,931 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-09-29 15:02:36,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 23 transitions, 58 flow [2022-09-29 15:02:36,947 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 23 transitions, 58 flow [2022-09-29 15:02:36,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 58 flow [2022-09-29 15:02:36,954 INFO L175 PetriNetUnfolderBase]: Searched whole Unfolding. [2022-09-29 15:02:36,954 INFO L123 PetriNetUnfolderBase]: 2/23 cut-off events. [2022-09-29 15:02:36,954 INFO L124 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2022-09-29 15:02:36,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 2/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2022-09-29 15:02:36,960 INFO L116 LiptonReduction]: Number of co-enabled transitions 138 [2022-09-29 15:02:37,135 INFO L131 LiptonReduction]: Checked pairs total: 100 [2022-09-29 15:02:37,135 INFO L133 LiptonReduction]: Total number of compositions: 10 [2022-09-29 15:02:37,144 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-09-29 15:02:37,145 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-09-29 15:02:37,145 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-09-29 15:02:37,145 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-09-29 15:02:37,145 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-09-29 15:02:37,145 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-09-29 15:02:37,145 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-09-29 15:02:37,145 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiPetriNetCegarLoop ======== [2022-09-29 15:02:37,146 INFO L68 IsEmptyBuchi]: Start isEmptyBuchi. Operand has 18 places, 13 transitions, 38 flow [2022-09-29 15:02:37,162 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 18 places, 13 transitions, 38 flow [2022-09-29 15:02:37,163 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:37,163 INFO L157 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2022-09-29 15:02:37,163 INFO L123 PetriNetUnfolderBase]: 0/3 cut-off events. [2022-09-29 15:02:37,163 INFO L124 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2022-09-29 15:02:37,163 INFO L78 IsEmptyBuchi]: Finished isEmptyBuchi language is not empty [2022-09-29 15:02:37,165 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-09-29 15:02:37,166 INFO L68 IsEmptyBuchi]: Start isEmptyBuchi. Operand has 18 places, 13 transitions, 38 flow [2022-09-29 15:02:37,167 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 18 places, 13 transitions, 38 flow [2022-09-29 15:02:37,167 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:37,167 INFO L157 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2022-09-29 15:02:37,167 INFO L123 PetriNetUnfolderBase]: 0/3 cut-off events. [2022-09-29 15:02:37,167 INFO L124 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2022-09-29 15:02:37,167 INFO L78 IsEmptyBuchi]: Finished isEmptyBuchi language is not empty [2022-09-29 15:02:37,182 INFO L733 eck$LassoCheckResult]: Stem: 34#[ULTIMATE.startENTRY]true [31] ULTIMATE.startENTRY-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x] 36#[L43]true [71] L43-->thread1ENTRY: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_12} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0, thread1Thread1of1ForFork0_i] 38#[L43-1, thread1ENTRY]true [54] thread1ENTRY-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_i_1 0) InVars {} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_1} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i] 40#[L19-1, L43-1]true [2022-09-29 15:02:37,183 INFO L735 eck$LassoCheckResult]: Loop: 40#[L19-1, L43-1]true [86] L19-1-->L19-1: Formula: (and (< v_thread1Thread1of1ForFork0_i_20 v_N_13) (= v_x_94 (+ v_x_95 4)) (= v_thread1Thread1of1ForFork0_i_19 (+ v_thread1Thread1of1ForFork0_i_20 1))) InVars {N=v_N_13, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_20, x=v_x_95} OutVars{N=v_N_13, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_19, x=v_x_94} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i, x] 40#[L19-1, L43-1]true [2022-09-29 15:02:37,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 15:02:37,186 INFO L85 PathProgramCache]: Analyzing trace with hash 61837, now seen corresponding path program 1 times [2022-09-29 15:02:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 15:02:37,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246708811] [2022-09-29 15:02:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 15:02:37,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 15:02:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:37,243 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 15:02:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:37,254 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 15:02:37,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 15:02:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash 117, now seen corresponding path program 1 times [2022-09-29 15:02:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 15:02:37,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508644520] [2022-09-29 15:02:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 15:02:37,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 15:02:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:37,265 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 15:02:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:37,268 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 15:02:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 15:02:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1917033, now seen corresponding path program 1 times [2022-09-29 15:02:37,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 15:02:37,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367376269] [2022-09-29 15:02:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 15:02:37,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 15:02:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:37,284 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 15:02:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:37,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 15:02:37,330 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 15:02:37,330 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 15:02:37,331 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 15:02:37,331 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 15:02:37,331 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-09-29 15:02:37,331 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:37,331 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 15:02:37,331 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 15:02:37,331 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration1_Loop [2022-09-29 15:02:37,331 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 15:02:37,331 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 15:02:37,340 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 15:02:37,347 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 15:02:37,378 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 15:02:37,379 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-09-29 15:02:37,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:37,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:37,388 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-09-29 15:02:37,389 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 15:02:37,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-09-29 15:02:37,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:37,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:37,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:37,459 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-09-29 15:02:37,459 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 15:02:37,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-09-29 15:02:37,483 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-09-29 15:02:37,483 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {x=0} Honda state: {x=0} Generalized eigenvectors: [{x=6}, {x=-2}, {x=0}] Lambdas: [1, 1, 4] Nus: [0, 1] [2022-09-29 15:02:37,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:37,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:37,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:37,505 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-09-29 15:02:37,505 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 15:02:37,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-09-29 15:02:37,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:37,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:37,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:37,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:37,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-09-29 15:02:37,536 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-09-29 15:02:37,537 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 15:02:37,653 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-09-29 15:02:37,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:37,659 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 15:02:37,659 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 15:02:37,659 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 15:02:37,659 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 15:02:37,660 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-09-29 15:02:37,660 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:37,660 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 15:02:37,660 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 15:02:37,660 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration1_Loop [2022-09-29 15:02:37,660 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 15:02:37,660 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 15:02:37,661 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 15:02:37,665 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 15:02:37,692 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 15:02:37,736 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-09-29 15:02:37,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:37,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:37,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:37,768 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 [2022-09-29 15:02:37,775 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-09-29 15:02:37,775 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-09-29 15:02:37,775 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-09-29 15:02:37,776 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-09-29 15:02:37,776 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-09-29 15:02:37,777 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-09-29 15:02:37,777 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-09-29 15:02:37,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-09-29 15:02:37,791 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-09-29 15:02:37,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:37,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:37,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:37,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:37,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-09-29 15:02:37,813 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 [2022-09-29 15:02:37,820 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-09-29 15:02:37,820 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-09-29 15:02:37,821 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-09-29 15:02:37,821 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-09-29 15:02:37,821 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-09-29 15:02:37,821 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-09-29 15:02:37,822 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-09-29 15:02:37,836 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-09-29 15:02:37,839 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2022-09-29 15:02:37,839 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-09-29 15:02:37,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:37,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:37,842 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:37,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-09-29 15:02:37,844 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-09-29 15:02:37,844 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-09-29 15:02:37,844 INFO L513 LassoAnalysis]: Proved termination. [2022-09-29 15:02:37,844 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread1Thread1of1ForFork0_i, N) = -1*thread1Thread1of1ForFork0_i + 1*N Supporting invariants [] [2022-09-29 15:02:37,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:37,864 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-09-29 15:02:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 15:02:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 15:02:37,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2022-09-29 15:02:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 15:02:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 15:02:37,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-29 15:02:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 15:02:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 15:02:37,925 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-09-29 15:02:37,927 INFO L162 BuchiComplementFKV]: Start buchiComplementFKV with optimization HEIMAT2. Operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 15:02:37,997 INFO L171 BuchiComplementFKV]: Finished buchiComplementFKV with optimization HEIMAT2. Operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 6 states and 322 transitions.4 powerset states2 rank states. The highest rank that occured is 1 [2022-09-29 15:02:37,998 INFO L54 IntersectBuchiEager]: Starting Intersection [2022-09-29 15:02:38,000 INFO L61 IntersectBuchiEager]: Exiting Intersection [2022-09-29 15:02:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-09-29 15:02:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 15:02:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2022-09-29 15:02:38,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 107 transitions. Stem has 3 letters. Loop has 1 letters. [2022-09-29 15:02:38,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 15:02:38,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 107 transitions. Stem has 4 letters. Loop has 1 letters. [2022-09-29 15:02:38,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 15:02:38,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 107 transitions. Stem has 3 letters. Loop has 2 letters. [2022-09-29 15:02:38,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 15:02:38,010 INFO L428 stractBuchiCegarLoop]: Abstraction has has 30 places, 212 transitions, 1046 flow [2022-09-29 15:02:38,010 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-09-29 15:02:38,010 INFO L68 IsEmptyBuchi]: Start isEmptyBuchi. Operand has 30 places, 212 transitions, 1046 flow [2022-09-29 15:02:38,012 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 30 places, 212 transitions, 1046 flow [2022-09-29 15:02:38,013 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,015 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 30 places, 212 transitions, 1046 flow [2022-09-29 15:02:38,015 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,017 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 30 places, 212 transitions, 1046 flow [2022-09-29 15:02:38,018 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,018 INFO L157 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2022-09-29 15:02:38,018 INFO L123 PetriNetUnfolderBase]: 13/28 cut-off events. [2022-09-29 15:02:38,018 INFO L124 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2022-09-29 15:02:38,018 INFO L78 IsEmptyBuchi]: Finished isEmptyBuchi language is not empty [2022-09-29 15:02:38,019 INFO L733 eck$LassoCheckResult]: Stem: 34#[ULTIMATE.startENTRY]true [31] ULTIMATE.startENTRY-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x] 36#[L43]true [71] L43-->thread1ENTRY: Formula: (= v_thread1Thread1of1ForFork0_thidvar0_2 1) InVars {} OutVars{thread1Thread1of1ForFork0_thidvar0=v_thread1Thread1of1ForFork0_thidvar0_2, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_12} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_thidvar0, thread1Thread1of1ForFork0_i] 38#[L43-1, thread1ENTRY]true [74] L43-1-->thread2ENTRY: Formula: (and (= 2 v_thread2Thread1of1ForFork1_thidvar1_2) (= 2 v_thread2Thread1of1ForFork1_thidvar0_2)) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_12, thread2Thread1of1ForFork1_thidvar0=v_thread2Thread1of1ForFork1_thidvar0_2, thread2Thread1of1ForFork1_thidvar1=v_thread2Thread1of1ForFork1_thidvar1_2} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j, thread2Thread1of1ForFork1_thidvar0, thread2Thread1of1ForFork1_thidvar1] 91#[L44, thread2ENTRY, thread1ENTRY]true [63] thread2ENTRY-->L33-1: Formula: (= v_thread2Thread1of1ForFork1_j_1 0) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_1} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j] 93#[L44, L33-1, thread1ENTRY]true [2022-09-29 15:02:38,019 INFO L735 eck$LassoCheckResult]: Loop: 93#[L44, L33-1, thread1ENTRY]true [83] L33-1-->L33-1: Formula: (and (< v_thread2Thread1of1ForFork1_j_20 v_N_9) (= v_thread2Thread1of1ForFork1_j_19 (+ v_thread2Thread1of1ForFork1_j_20 1)) (= (+ v_x_69 (- 4)) v_x_68)) InVars {thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_20, N=v_N_9, x=v_x_69} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_19, N=v_N_9, x=v_x_68} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j, x] 93#[L44, L33-1, thread1ENTRY]true [2022-09-29 15:02:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 15:02:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1917630, now seen corresponding path program 1 times [2022-09-29 15:02:38,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 15:02:38,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493415350] [2022-09-29 15:02:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 15:02:38,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 15:02:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:38,022 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 15:02:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:38,025 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 15:02:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 15:02:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash 114, now seen corresponding path program 1 times [2022-09-29 15:02:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 15:02:38,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969124310] [2022-09-29 15:02:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 15:02:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 15:02:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:38,028 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 15:02:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:38,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 15:02:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 15:02:38,031 INFO L85 PathProgramCache]: Analyzing trace with hash 59446613, now seen corresponding path program 1 times [2022-09-29 15:02:38,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 15:02:38,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493246241] [2022-09-29 15:02:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 15:02:38,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 15:02:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:38,035 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 15:02:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 15:02:38,038 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 15:02:38,051 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 15:02:38,052 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 15:02:38,052 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 15:02:38,052 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 15:02:38,052 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-09-29 15:02:38,052 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:38,052 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 15:02:38,052 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 15:02:38,052 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration2_Loop [2022-09-29 15:02:38,052 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 15:02:38,052 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 15:02:38,052 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 15:02:38,060 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 15:02:38,080 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 15:02:38,080 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-09-29 15:02:38,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:38,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:38,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:38,086 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-09-29 15:02:38,086 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 15:02:38,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-09-29 15:02:38,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:38,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:38,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:38,123 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:38,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-09-29 15:02:38,125 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-09-29 15:02:38,125 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 15:02:38,238 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-09-29 15:02:38,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:38,243 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 15:02:38,243 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 15:02:38,243 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 15:02:38,243 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 15:02:38,243 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-09-29 15:02:38,244 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:38,244 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 15:02:38,244 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 15:02:38,244 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration2_Loop [2022-09-29 15:02:38,244 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 15:02:38,244 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 15:02:38,244 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 15:02:38,250 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-09-29 15:02:38,270 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 15:02:38,271 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-09-29 15:02:38,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:38,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:38,272 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:38,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-09-29 15:02:38,274 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 [2022-09-29 15:02:38,280 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-09-29 15:02:38,281 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-09-29 15:02:38,281 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-09-29 15:02:38,281 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-09-29 15:02:38,281 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-09-29 15:02:38,282 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-09-29 15:02:38,282 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-09-29 15:02:38,284 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-09-29 15:02:38,287 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2022-09-29 15:02:38,287 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-09-29 15:02:38,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 15:02:38,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 15:02:38,340 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-09-29 15:02:38,353 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-09-29 15:02:38,353 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-09-29 15:02:38,353 INFO L513 LassoAnalysis]: Proved termination. [2022-09-29 15:02:38,354 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread2Thread1of1ForFork1_j, N) = -1*thread2Thread1of1ForFork1_j + 1*N Supporting invariants [] [2022-09-29 15:02:38,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-09-29 15:02:38,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:38,402 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-09-29 15:02:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 15:02:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 15:02:38,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2022-09-29 15:02:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 15:02:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 15:02:38,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-29 15:02:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 15:02:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 15:02:38,428 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-09-29 15:02:38,428 INFO L162 BuchiComplementFKV]: Start buchiComplementFKV with optimization HEIMAT2. Operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 15:02:38,493 INFO L171 BuchiComplementFKV]: Finished buchiComplementFKV with optimization HEIMAT2. Operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 6 states and 322 transitions.4 powerset states2 rank states. The highest rank that occured is 1 [2022-09-29 15:02:38,493 INFO L54 IntersectBuchiEager]: Starting Intersection [2022-09-29 15:02:38,524 INFO L61 IntersectBuchiEager]: Exiting Intersection [2022-09-29 15:02:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-09-29 15:02:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 15:02:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2022-09-29 15:02:38,526 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 107 transitions. Stem has 4 letters. Loop has 1 letters. [2022-09-29 15:02:38,526 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 15:02:38,526 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 107 transitions. Stem has 5 letters. Loop has 1 letters. [2022-09-29 15:02:38,526 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 15:02:38,526 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 107 transitions. Stem has 4 letters. Loop has 2 letters. [2022-09-29 15:02:38,527 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 15:02:38,527 INFO L428 stractBuchiCegarLoop]: Abstraction has has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,527 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-09-29 15:02:38,527 INFO L68 IsEmptyBuchi]: Start isEmptyBuchi. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,545 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,552 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,554 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,560 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,571 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,581 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,586 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,596 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,598 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,610 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,619 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,630 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,633 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,638 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,639 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,643 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,681 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,687 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,689 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,710 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,711 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,716 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,718 INFO L76 AcceptsInfiniteWords]: Start buchiAccepts. Operand has 42 places, 3420 transitions, 23760 flow [2022-09-29 15:02:38,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-09-29 15:02:38,728 INFO L82 AcceptsInfiniteWords]: Finished buchiAccepts. [2022-09-29 15:02:38,744 INFO L175 PetriNetUnfolderBase]: Searched whole Unfolding. [2022-09-29 15:02:38,744 INFO L123 PetriNetUnfolderBase]: 193/321 cut-off events. [2022-09-29 15:02:38,744 INFO L124 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2022-09-29 15:02:38,745 INFO L47 CFPrefixIsEmptyBuchi]: Starting emptiness check. [2022-09-29 15:02:38,745 INFO L62 CFPrefixIsEmptyBuchi]: Starting cutoff event analysis. [2022-09-29 15:02:38,746 INFO L72 CFPrefixIsEmptyBuchi]: Ended cutoff event analysis. [2022-09-29 15:02:38,746 INFO L76 CFPrefixIsEmptyBuchi]: Type 1 Lasso search started. [2022-09-29 15:02:38,746 INFO L87 CFPrefixIsEmptyBuchi]: Type 1 Lasso search ended. [2022-09-29 15:02:38,746 INFO L107 CFPrefixIsEmptyBuchi]: Type 3 Lasso search started. [2022-09-29 15:02:38,757 INFO L206 CFPrefixIsEmptyBuchi]: Type 3 Lasso search ended. [2022-09-29 15:02:38,757 INFO L50 CFPrefixIsEmptyBuchi]: Finished emptiness check, language is empty [2022-09-29 15:02:38,757 INFO L78 IsEmptyBuchi]: Finished isEmptyBuchi language is empty [2022-09-29 15:02:38,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2022-09-29 15:02:38,762 INFO L202 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.09 03:02:38 BoogieIcfgContainer [2022-09-29 15:02:38,763 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-09-29 15:02:38,769 INFO L158 Benchmark]: Toolchain (without parser) took 2200.96ms. Allocated memory was 241.2MB in the beginning and 329.3MB in the end (delta: 88.1MB). Free memory was 198.4MB in the beginning and 283.5MB in the end (delta: -85.1MB). Peak memory consumption was 44.8MB. Max. memory is 8.0GB. [2022-09-29 15:02:38,769 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 241.2MB. Free memory is still 199.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-29 15:02:38,769 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.90ms. Allocated memory is still 241.2MB. Free memory was 198.3MB in the beginning and 196.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-29 15:02:38,770 INFO L158 Benchmark]: Boogie Preprocessor took 10.24ms. Allocated memory is still 241.2MB. Free memory was 196.8MB in the beginning and 195.8MB in the end (delta: 956.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-29 15:02:38,773 INFO L158 Benchmark]: RCFGBuilder took 212.85ms. Allocated memory is still 241.2MB. Free memory was 195.8MB in the beginning and 214.1MB in the end (delta: -18.3MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. [2022-09-29 15:02:38,774 INFO L158 Benchmark]: BuchiAutomizer took 1945.33ms. Allocated memory was 241.2MB in the beginning and 329.3MB in the end (delta: 88.1MB). Free memory was 213.9MB in the beginning and 283.5MB in the end (delta: -69.6MB). Peak memory consumption was 60.8MB. Max. memory is 8.0GB. [2022-09-29 15:02:38,777 INFO L339 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 0.10ms. Allocated memory is still 241.2MB. Free memory is still 199.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.90ms. Allocated memory is still 241.2MB. Free memory was 198.3MB in the beginning and 196.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.24ms. Allocated memory is still 241.2MB. Free memory was 196.8MB in the beginning and 195.8MB in the end (delta: 956.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 212.85ms. Allocated memory is still 241.2MB. Free memory was 195.8MB in the beginning and 214.1MB in the end (delta: -18.3MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. * BuchiAutomizer took 1945.33ms. Allocated memory was 241.2MB in the beginning and 329.3MB in the end (delta: 88.1MB). Free memory was 213.9MB in the beginning and 283.5MB in the end (delta: -69.6MB). Peak memory consumption was 60.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (0 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * i + N and consists of 3 locations. One deterministic module has affine ranking function N + -1 * j and consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.8s and 3 iterations. TraceHistogramMax:0. Analysis of lassos took 1.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 1. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. 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, 138 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 136 mSDsluCounter, 116 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 50 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 108 IncrementalHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 82 mSDtfsCounter, 108 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp66 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 55ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 1 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s InitialAbstractionConstructionTime: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 28 PlacesBefore, 18 PlacesAfterwards, 23 TransitionsBefore, 13 TransitionsAfterwards, 138 CoEnabledTransitionPairs, 4 FixpointIterations, 1 TrivialSequentialCompositions, 9 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 100 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 100, positive: 100, positive conditional: 0, positive unconditional: 100, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 73, positive: 73, positive conditional: 0, positive unconditional: 73, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 73, positive: 65, positive conditional: 0, positive unconditional: 65, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 38, positive: 38, positive conditional: 0, positive unconditional: 38, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 100, positive: 27, positive conditional: 0, positive unconditional: 27, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 73, unknown conditional: 0, unknown unconditional: 73] , Statistics on independence cache: Total cache size (in pairs): 8, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 RESULT: Ultimate proved your program to be correct! [2022-09-29 15:02:38,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...