/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-automaton-semanticLbe.epf -i ../../../trunk/examples/concurrent/bpl/loop-lockstep-example.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.fs.omega-petrinet-ed1a3e5-m [2022-09-29 14:45:27,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-29 14:45:27,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-29 14:45:27,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-29 14:45:27,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-29 14:45:27,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-29 14:45:27,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-29 14:45:27,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-29 14:45:27,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-29 14:45:27,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-29 14:45:27,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-29 14:45:27,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-09-29 14:45:27,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-29 14:45:27,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-29 14:45:27,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-29 14:45:27,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-semanticLbe.epf [2022-09-29 14:45:27,193 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-29 14:45:27,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-29 14:45:27,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-09-29 14:45:27,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-09-29 14:45:27,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-29 14:45:27,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-29 14:45:27,195 INFO L138 SettingsManager]: * Use SBE=true [2022-09-29 14:45:27,195 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-09-29 14:45:27,195 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-09-29 14:45:27,195 INFO L138 SettingsManager]: * Use old map elimination=false [2022-09-29 14:45:27,195 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-09-29 14:45:27,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-09-29 14:45:27,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-09-29 14:45:27,197 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-29 14:45:27,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-29 14:45:27,197 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-09-29 14:45:27,197 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-29 14:45:27,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-09-29 14:45:27,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-29 14:45:27,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-29 14:45:27,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-29 14:45:27,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-29 14:45:27,198 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-09-29 14:45:27,198 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-29 14:45:27,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-29 14:45:27,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-29 14:45:27,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-29 14:45:27,396 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-09-29 14:45:27,397 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-09-29 14:45:27,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/loop-lockstep-example.bpl [2022-09-29 14:45:27,398 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/loop-lockstep-example.bpl' [2022-09-29 14:45:27,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-29 14:45:27,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-09-29 14:45:27,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-29 14:45:27,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-29 14:45:27,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-29 14:45:27,421 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,426 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,430 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-09-29 14:45:27,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-29 14:45:27,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-29 14:45:27,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-29 14:45:27,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-29 14:45:27,437 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,438 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,438 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,438 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,439 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,441 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,442 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-29 14:45:27,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-29 14:45:27,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-29 14:45:27,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-29 14:45:27,446 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 02:45:27" (1/1) ... [2022-09-29 14:45:27,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:27,471 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 14:45:27,489 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 14:45:27,499 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-09-29 14:45:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-29 14:45:27,499 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-29 14:45:27,499 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-09-29 14:45:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-29 14:45:27,499 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-29 14:45:27,500 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-09-29 14:45:27,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-29 14:45:27,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-29 14:45:27,501 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 14:45:27,533 INFO L234 CfgBuilder]: Building ICFG [2022-09-29 14:45:27,533 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-29 14:45:27,655 INFO L275 CfgBuilder]: Performing block encoding [2022-09-29 14:45:27,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-29 14:45:27,660 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-09-29 14:45:27,661 INFO L202 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 02:45:27 BoogieIcfgContainer [2022-09-29 14:45:27,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-29 14:45:27,662 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-09-29 14:45:27,662 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-09-29 14:45:27,669 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-09-29 14:45:27,670 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-09-29 14:45:27,670 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 02:45:27" (1/2) ... [2022-09-29 14:45:27,674 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a63947f and model type loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.09 02:45:27, skipping insertion in model container [2022-09-29 14:45:27,674 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-09-29 14:45:27,674 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 02:45:27" (2/2) ... [2022-09-29 14:45:27,675 INFO L322 chiAutomizerObserver]: Analyzing ICFG loop-lockstep-example.bpl [2022-09-29 14:45:27,760 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-29 14:45:27,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 70 flow [2022-09-29 14:45:27,848 INFO L175 PetriNetUnfolderBase]: Searched whole Unfolding. [2022-09-29 14:45:27,848 INFO L123 PetriNetUnfolderBase]: 2/23 cut-off events. [2022-09-29 14:45:27,848 INFO L124 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2022-09-29 14:45:27,850 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 14:45:27,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 70 flow [2022-09-29 14:45:27,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2022-09-29 14:45:27,856 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-09-29 14:45:27,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 23 transitions, 58 flow [2022-09-29 14:45:27,884 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 23 transitions, 58 flow [2022-09-29 14:45:27,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 58 flow [2022-09-29 14:45:27,890 INFO L175 PetriNetUnfolderBase]: Searched whole Unfolding. [2022-09-29 14:45:27,890 INFO L123 PetriNetUnfolderBase]: 2/23 cut-off events. [2022-09-29 14:45:27,890 INFO L124 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2022-09-29 14:45:27,890 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 14:45:27,891 INFO L116 LiptonReduction]: Number of co-enabled transitions 138 [2022-09-29 14:45:28,107 INFO L131 LiptonReduction]: Checked pairs total: 100 [2022-09-29 14:45:28,108 INFO L133 LiptonReduction]: Total number of compositions: 10 [2022-09-29 14:45:28,122 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-09-29 14:45:28,122 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-09-29 14:45:28,122 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-09-29 14:45:28,122 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-09-29 14:45:28,122 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-09-29 14:45:28,122 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-09-29 14:45:28,122 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-09-29 14:45:28,123 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-09-29 14:45:28,124 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2022-09-29 14:45:28,150 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 7 [2022-09-29 14:45:28,151 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-09-29 14:45:28,151 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-09-29 14:45:28,154 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-09-29 14:45:28,154 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-09-29 14:45:28,155 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-09-29 14:45:28,155 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 19 states, but on-demand construction may add more states [2022-09-29 14:45:28,157 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 7 [2022-09-29 14:45:28,158 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-09-29 14:45:28,158 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-09-29 14:45:28,158 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-09-29 14:45:28,158 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-09-29 14:45:28,161 INFO L733 eck$LassoCheckResult]: Stem: 33#[ULTIMATE.startENTRY]don't care [31] ULTIMATE.startENTRY-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x] 36#[L43]don't care [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]don't care [54] thread1ENTRY-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_i_1 0) InVars {} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_1} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i] 40#[L43-1, L19-1]don't care [2022-09-29 14:45:28,162 INFO L735 eck$LassoCheckResult]: Loop: 40#[L43-1, L19-1]don't care [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#[L43-1, L19-1]don't care [2022-09-29 14:45:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:45:28,166 INFO L85 PathProgramCache]: Analyzing trace with hash 61837, now seen corresponding path program 1 times [2022-09-29 14:45:28,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:45:28,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926283624] [2022-09-29 14:45:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:45:28,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:45:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:28,227 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:45:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:28,243 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:45:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:45:28,246 INFO L85 PathProgramCache]: Analyzing trace with hash 117, now seen corresponding path program 1 times [2022-09-29 14:45:28,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:45:28,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391226684] [2022-09-29 14:45:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:45:28,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:45:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:28,255 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:45:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:28,260 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:45:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:45:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1917033, now seen corresponding path program 1 times [2022-09-29 14:45:28,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:45:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561801347] [2022-09-29 14:45:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:45:28,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:45:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:28,271 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:45:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:28,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:45:28,333 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:45:28,334 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:45:28,334 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:45:28,334 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:45:28,334 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-09-29 14:45:28,334 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:28,334 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:45:28,334 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:45:28,334 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration1_Loop [2022-09-29 14:45:28,334 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:45:28,334 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:45:28,345 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 14:45:28,367 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 14:45:28,403 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:45:28,404 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-09-29 14:45:28,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:28,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:28,407 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 14:45:28,418 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 14:45:28,419 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-09-29 14:45:28,419 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:45:28,460 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 14:45:28,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:28,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:28,469 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 14:45:28,483 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 14:45:28,513 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-09-29 14:45:28,513 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:45:28,544 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-09-29 14:45:28,544 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 14:45:28,575 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 14:45:28,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:28,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:28,577 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 14:45:28,579 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 14:45:28,580 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-09-29 14:45:28,580 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:45:28,619 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 14:45:28,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:28,628 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 14:45:28,629 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 14:45:28,631 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-09-29 14:45:28,631 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:45:28,745 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-09-29 14:45:28,751 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 14:45:28,751 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:45:28,752 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:45:28,752 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:45:28,752 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:45:28,752 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-09-29 14:45:28,752 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:28,752 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:45:28,753 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:45:28,753 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration1_Loop [2022-09-29 14:45:28,753 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:45:28,753 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:45:28,753 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 14:45:28,759 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 14:45:28,787 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:45:28,790 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-09-29 14:45:28,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:28,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:28,792 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 14:45:28,794 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 14:45:28,795 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 14:45:28,801 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-09-29 14:45:28,801 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-09-29 14:45:28,802 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-09-29 14:45:28,802 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-09-29 14:45:28,802 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-09-29 14:45:28,803 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-09-29 14:45:28,803 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-09-29 14:45:28,819 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-09-29 14:45:28,836 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 14:45:28,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:28,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:28,838 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 14:45:28,839 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 14:45:28,840 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 14:45:28,846 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-09-29 14:45:28,846 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-09-29 14:45:28,846 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-09-29 14:45:28,846 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-09-29 14:45:28,846 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-09-29 14:45:28,847 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-09-29 14:45:28,847 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-09-29 14:45:28,863 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-09-29 14:45:28,881 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2022-09-29 14:45:28,882 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-09-29 14:45:28,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:28,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:28,884 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 14:45:28,885 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 14:45:28,888 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-09-29 14:45:28,888 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-09-29 14:45:28,888 INFO L513 LassoAnalysis]: Proved termination. [2022-09-29 14:45:28,888 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread1Thread1of1ForFork0_i, N) = -1*thread1Thread1of1ForFork0_i + 1*N Supporting invariants [] [2022-09-29 14:45:28,906 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 14:45:28,908 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-09-29 14:45:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:45:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:45:28,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2022-09-29 14:45:28,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:45:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:45:28,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-29 14:45:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:45:28,951 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 14:45:28,970 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 14:45:28,972 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand currently 19 states, but on-demand construction may add more states Second 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 14:45:29,003 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand currently 19 states, but on-demand construction may add more states. Second 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 45 states and 101 transitions. Complement of second has 4 states. [2022-09-29 14:45:29,005 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 14:45:29,008 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 14:45:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2022-09-29 14:45:29,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 23 transitions. Stem has 3 letters. Loop has 1 letters. [2022-09-29 14:45:29,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:45:29,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 23 transitions. Stem has 4 letters. Loop has 1 letters. [2022-09-29 14:45:29,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:45:29,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 23 transitions. Stem has 3 letters. Loop has 2 letters. [2022-09-29 14:45:29,011 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:45:29,011 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 101 transitions. [2022-09-29 14:45:29,013 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2022-09-29 14:45:29,016 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 23 states and 53 transitions. [2022-09-29 14:45:29,017 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2022-09-29 14:45:29,017 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-09-29 14:45:29,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 53 transitions. [2022-09-29 14:45:29,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-09-29 14:45:29,017 INFO L218 hiAutomatonCegarLoop]: Abstraction has 23 states and 53 transitions. [2022-09-29 14:45:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 53 transitions. [2022-09-29 14:45:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-09-29 14:45:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 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 14:45:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 47 transitions. [2022-09-29 14:45:29,034 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 47 transitions. [2022-09-29 14:45:29,034 INFO L428 stractBuchiCegarLoop]: Abstraction has 20 states and 47 transitions. [2022-09-29 14:45:29,034 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-09-29 14:45:29,034 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 47 transitions. [2022-09-29 14:45:29,035 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2022-09-29 14:45:29,035 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-09-29 14:45:29,035 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-09-29 14:45:29,036 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-09-29 14:45:29,036 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-09-29 14:45:29,036 INFO L733 eck$LassoCheckResult]: Stem: 169#[ULTIMATE.startENTRY]don't care [31] ULTIMATE.startENTRY-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x] 171#[L43]don't care [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] 179#[L43-1, thread1ENTRY]don't care [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] 185#[thread2ENTRY, thread1ENTRY, L44]don't care [63] thread2ENTRY-->L33-1: Formula: (= v_thread2Thread1of1ForFork1_j_1 0) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_1} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j] 181#[L33-1, thread1ENTRY, L44]don't care [2022-09-29 14:45:29,036 INFO L735 eck$LassoCheckResult]: Loop: 181#[L33-1, thread1ENTRY, L44]don't care [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] 181#[L33-1, thread1ENTRY, L44]don't care [2022-09-29 14:45:29,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:45:29,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1917630, now seen corresponding path program 1 times [2022-09-29 14:45:29,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:45:29,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281397958] [2022-09-29 14:45:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:45:29,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:45:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:29,040 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:45:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:29,042 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:45:29,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:45:29,042 INFO L85 PathProgramCache]: Analyzing trace with hash 114, now seen corresponding path program 1 times [2022-09-29 14:45:29,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:45:29,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576155231] [2022-09-29 14:45:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:45:29,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:45:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:29,045 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:45:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:29,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:45:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:45:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash 59446613, now seen corresponding path program 1 times [2022-09-29 14:45:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 14:45:29,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567527528] [2022-09-29 14:45:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 14:45:29,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 14:45:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:29,052 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 14:45:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 14:45:29,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 14:45:29,067 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:45:29,068 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:45:29,068 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:45:29,068 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:45:29,068 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-09-29 14:45:29,068 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:29,068 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:45:29,068 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:45:29,068 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration2_Loop [2022-09-29 14:45:29,068 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:45:29,068 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:45:29,069 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 14:45:29,073 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 14:45:29,093 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:45:29,093 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-09-29 14:45:29,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:29,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:29,095 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 14:45:29,096 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 14:45:29,100 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-09-29 14:45:29,100 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:45:29,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2022-09-29 14:45:29,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:29,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:29,160 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 14:45:29,161 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 14:45:29,162 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-09-29 14:45:29,162 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-09-29 14:45:29,265 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-09-29 14:45:29,270 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 14:45:29,270 INFO L210 LassoAnalysis]: Preferences: [2022-09-29 14:45:29,270 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-09-29 14:45:29,270 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-09-29 14:45:29,270 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-09-29 14:45:29,271 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-09-29 14:45:29,271 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:29,271 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-09-29 14:45:29,271 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-09-29 14:45:29,271 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration2_Loop [2022-09-29 14:45:29,271 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-09-29 14:45:29,271 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-09-29 14:45:29,272 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 14:45:29,277 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 14:45:29,303 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-09-29 14:45:29,303 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-09-29 14:45:29,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:29,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:29,304 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 14:45:29,305 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 14:45:29,306 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 14:45:29,312 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-09-29 14:45:29,312 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-09-29 14:45:29,312 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-09-29 14:45:29,312 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-09-29 14:45:29,312 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-09-29 14:45:29,314 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-09-29 14:45:29,314 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-09-29 14:45:29,329 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-09-29 14:45:29,332 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2022-09-29 14:45:29,333 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-09-29 14:45:29,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-09-29 14:45:29,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 14:45:29,334 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 14:45:29,340 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-09-29 14:45:29,340 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-09-29 14:45:29,340 INFO L513 LassoAnalysis]: Proved termination. [2022-09-29 14:45:29,340 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread2Thread1of1ForFork1_j, N) = -1*thread2Thread1of1ForFork1_j + 1*N Supporting invariants [] [2022-09-29 14:45:29,355 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 14:45:29,364 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 14:45:29,365 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-09-29 14:45:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 14:45:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:45:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2022-09-29 14:45:29,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:45:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 14:45:29,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-29 14:45:29,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 14:45:29,386 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 14:45:29,386 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 14:45:29,386 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states and 47 transitions. cyclomatic complexity: 34 Second 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 14:45:29,398 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states and 47 transitions. cyclomatic complexity: 34. Second 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 36 states and 81 transitions. Complement of second has 4 states. [2022-09-29 14:45:29,399 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 14:45:29,399 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 14:45:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 17 transitions. [2022-09-29 14:45:29,400 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 17 transitions. Stem has 4 letters. Loop has 1 letters. [2022-09-29 14:45:29,400 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:45:29,400 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 17 transitions. Stem has 5 letters. Loop has 1 letters. [2022-09-29 14:45:29,400 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:45:29,400 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 17 transitions. Stem has 4 letters. Loop has 2 letters. [2022-09-29 14:45:29,400 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-09-29 14:45:29,400 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 81 transitions. [2022-09-29 14:45:29,401 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-09-29 14:45:29,401 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 0 states and 0 transitions. [2022-09-29 14:45:29,402 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-09-29 14:45:29,402 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-09-29 14:45:29,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-09-29 14:45:29,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-29 14:45:29,402 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-09-29 14:45:29,402 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-09-29 14:45:29,402 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-09-29 14:45:29,402 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-09-29 14:45:29,402 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-09-29 14:45:29,402 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-09-29 14:45:29,402 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-09-29 14:45:29,407 INFO L202 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.09 02:45:29 BoogieIcfgContainer [2022-09-29 14:45:29,407 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-09-29 14:45:29,407 INFO L158 Benchmark]: Toolchain (without parser) took 1994.47ms. Allocated memory was 182.5MB in the beginning and 267.4MB in the end (delta: 84.9MB). Free memory was 136.2MB in the beginning and 190.3MB in the end (delta: -54.1MB). Peak memory consumption was 30.2MB. Max. memory is 8.0GB. [2022-09-29 14:45:29,408 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 182.5MB. Free memory was 137.2MB in the beginning and 137.1MB in the end (delta: 129.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-09-29 14:45:29,408 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.28ms. Allocated memory is still 182.5MB. Free memory was 136.1MB in the beginning and 134.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-09-29 14:45:29,408 INFO L158 Benchmark]: Boogie Preprocessor took 11.07ms. Allocated memory is still 182.5MB. Free memory was 134.5MB in the beginning and 133.6MB in the end (delta: 956.2kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-29 14:45:29,408 INFO L158 Benchmark]: RCFGBuilder took 217.21ms. Allocated memory is still 182.5MB. Free memory was 133.6MB in the beginning and 125.1MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-09-29 14:45:29,409 INFO L158 Benchmark]: BuchiAutomizer took 1744.52ms. Allocated memory was 182.5MB in the beginning and 267.4MB in the end (delta: 84.9MB). Free memory was 124.9MB in the beginning and 190.3MB in the end (delta: -65.4MB). Peak memory consumption was 18.7MB. Max. memory is 8.0GB. [2022-09-29 14:45:29,410 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 0.11ms. Allocated memory is still 182.5MB. Free memory was 137.2MB in the beginning and 137.1MB in the end (delta: 129.4kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.28ms. Allocated memory is still 182.5MB. Free memory was 136.1MB in the beginning and 134.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 11.07ms. Allocated memory is still 182.5MB. Free memory was 134.5MB in the beginning and 133.6MB in the end (delta: 956.2kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 217.21ms. Allocated memory is still 182.5MB. Free memory was 133.6MB in the beginning and 125.1MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 1744.52ms. Allocated memory was 182.5MB in the beginning and 267.4MB in the end (delta: 84.9MB). Free memory was 124.9MB in the beginning and 190.3MB in the end (delta: -65.4MB). Peak memory consumption was 18.7MB. 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 1.6s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 1.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 1. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 3 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, 28 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 31 IncrementalHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 9 mSDtfsCounter, 31 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: 28ms 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: 0.3s - 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: 50, positive: 50, positive conditional: 0, positive unconditional: 50, 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 14:45:29,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-09-29 14:45:29,636 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 14:45:29,838 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...