/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/default/automizer/svcomp-Termination-32bit-Automizer_Default.epf --buchiautomizer.automaton.type.for.concurrent.programs BUCHI_AUTOMATON -i ../../../trunk/examples/concurrent/bpl/regression/loop-lockstep-example.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.fs.rabin-petrinet-4c29625-m [2023-10-12 17:12:05,547 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-10-12 17:12:05,607 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Termination-32bit-Automizer_Default.epf [2023-10-12 17:12:05,628 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-10-12 17:12:05,629 INFO L135 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-10-12 17:12:05,629 INFO L137 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-10-12 17:12:05,630 INFO L135 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-10-12 17:12:05,630 INFO L137 SettingsManager]: * Create parallel compositions if possible=false [2023-10-12 17:12:05,631 INFO L137 SettingsManager]: * Use SBE=true [2023-10-12 17:12:05,634 INFO L135 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-10-12 17:12:05,634 INFO L137 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-10-12 17:12:05,634 INFO L137 SettingsManager]: * Use old map elimination=false [2023-10-12 17:12:05,634 INFO L137 SettingsManager]: * Use external solver (rank synthesis)=false [2023-10-12 17:12:05,635 INFO L137 SettingsManager]: * Use only trivial implications for array writes=true [2023-10-12 17:12:05,635 INFO L137 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-10-12 17:12:05,636 INFO L135 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-10-12 17:12:05,636 INFO L137 SettingsManager]: * sizeof long=4 [2023-10-12 17:12:05,636 INFO L137 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-10-12 17:12:05,636 INFO L137 SettingsManager]: * Overapproximate operations on floating types=true [2023-10-12 17:12:05,636 INFO L137 SettingsManager]: * sizeof POINTER=4 [2023-10-12 17:12:05,637 INFO L137 SettingsManager]: * Check division by zero=IGNORE [2023-10-12 17:12:05,638 INFO L137 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-10-12 17:12:05,638 INFO L137 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-10-12 17:12:05,638 INFO L137 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-10-12 17:12:05,638 INFO L137 SettingsManager]: * sizeof long double=12 [2023-10-12 17:12:05,638 INFO L137 SettingsManager]: * Check if freed pointer was valid=false [2023-10-12 17:12:05,639 INFO L137 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-10-12 17:12:05,639 INFO L137 SettingsManager]: * Use constant arrays=true [2023-10-12 17:12:05,639 INFO L137 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-10-12 17:12:05,639 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-10-12 17:12:05,640 INFO L137 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-10-12 17:12:05,640 INFO L135 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-10-12 17:12:05,640 INFO L137 SettingsManager]: * Trace refinement strategy=CAMEL [2023-10-12 17:12:05,641 INFO L135 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-10-12 17:12:05,641 INFO L137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: Automaton type for concurrent programs -> BUCHI_AUTOMATON [2023-10-12 17:12:05,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-10-12 17:12:05,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-10-12 17:12:05,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-10-12 17:12:05,886 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-10-12 17:12:05,888 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-10-12 17:12:05,889 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/loop-lockstep-example.bpl [2023-10-12 17:12:05,890 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/loop-lockstep-example.bpl' [2023-10-12 17:12:05,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-10-12 17:12:05,908 INFO L133 ToolchainWalker]: Walking toolchain with 4 elements. [2023-10-12 17:12:05,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-10-12 17:12:05,909 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-10-12 17:12:05,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-10-12 17:12:05,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,928 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2023-10-12 17:12:05,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-10-12 17:12:05,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-10-12 17:12:05,930 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-10-12 17:12:05,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-10-12 17:12:05,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,938 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,938 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,940 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,946 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-10-12 17:12:05,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-10-12 17:12:05,947 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-10-12 17:12:05,947 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-10-12 17:12:05,947 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/1) ... [2023-10-12 17:12:05,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:05,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:05,976 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) [2023-10-12 17:12:05,988 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 [2023-10-12 17:12:06,009 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2023-10-12 17:12:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-10-12 17:12:06,012 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-10-12 17:12:06,012 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2023-10-12 17:12:06,013 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-10-12 17:12:06,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-10-12 17:12:06,013 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2023-10-12 17:12:06,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-10-12 17:12:06,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-10-12 17:12:06,014 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-10-12 17:12:06,047 INFO L236 CfgBuilder]: Building ICFG [2023-10-12 17:12:06,048 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-10-12 17:12:06,120 INFO L277 CfgBuilder]: Performing block encoding [2023-10-12 17:12:06,146 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-10-12 17:12:06,146 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-10-12 17:12:06,147 INFO L201 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:12:06 BoogieIcfgContainer [2023-10-12 17:12:06,148 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-10-12 17:12:06,148 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-10-12 17:12:06,148 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-10-12 17:12:06,151 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-10-12 17:12:06,152 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:12:06,153 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 05:12:05" (1/2) ... [2023-10-12 17:12:06,154 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@62b63a03 and model type loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 12.10 05:12:06, skipping insertion in model container [2023-10-12 17:12:06,154 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-10-12 17:12:06,154 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 05:12:06" (2/2) ... [2023-10-12 17:12:06,155 INFO L332 chiAutomizerObserver]: Analyzing ICFG loop-lockstep-example.bpl [2023-10-12 17:12:06,204 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-10-12 17:12:06,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 70 flow [2023-10-12 17:12:06,240 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-10-12 17:12:06,245 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:12:06,262 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 35 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. [2023-10-12 17:12:06,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 70 flow [2023-10-12 17:12:06,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2023-10-12 17:12:06,268 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-10-12 17:12:06,294 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 23 transitions, 58 flow [2023-10-12 17:12:06,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 23 transitions, 58 flow [2023-10-12 17:12:06,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 58 flow [2023-10-12 17:12:06,301 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-10-12 17:12:06,311 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-10-12 17:12:06,313 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 35 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. [2023-10-12 17:12:06,321 INFO L119 LiptonReduction]: Number of co-enabled transitions 138 [2023-10-12 17:12:06,638 INFO L134 LiptonReduction]: Checked pairs total: 110 [2023-10-12 17:12:06,638 INFO L136 LiptonReduction]: Total number of compositions: 10 [2023-10-12 17:12:06,652 INFO L305 stractBuchiCegarLoop]: Interprodecural is true [2023-10-12 17:12:06,652 INFO L306 stractBuchiCegarLoop]: Hoare is false [2023-10-12 17:12:06,652 INFO L307 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-10-12 17:12:06,652 INFO L308 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-10-12 17:12:06,652 INFO L309 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-10-12 17:12:06,652 INFO L310 stractBuchiCegarLoop]: Difference is false [2023-10-12 17:12:06,652 INFO L311 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-10-12 17:12:06,653 INFO L315 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-10-12 17:12:06,654 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2023-10-12 17:12:06,682 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 7 [2023-10-12 17:12:06,683 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:06,683 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:06,687 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-10-12 17:12:06,687 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2023-10-12 17:12:06,688 INFO L337 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-10-12 17:12:06,689 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 19 states, but on-demand construction may add more states [2023-10-12 17:12:06,692 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 7 [2023-10-12 17:12:06,692 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:06,692 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:06,693 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-10-12 17:12:06,693 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2023-10-12 17:12:06,696 INFO L748 eck$LassoCheckResult]: Stem: 33#[$Ultimate##0]don't care [46] $Ultimate##0-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x] 36#[L43]don't care [71] L43-->$Ultimate##0: 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, $Ultimate##0]don't care [54] $Ultimate##0-->L19-1: Formula: (= v_thread1Thread1of1ForFork0_i_1 0) InVars {} OutVars{thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_1} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i] 40#[L43-1, L19-1]don't care [2023-10-12 17:12:06,697 INFO L750 eck$LassoCheckResult]: Loop: 40#[L43-1, L19-1]don't care [86] L19-1-->L19-1: Formula: (and (= v_x_94 (+ v_x_95 4)) (= v_thread1Thread1of1ForFork0_i_23 (+ v_thread1Thread1of1ForFork0_i_24 1)) (< v_thread1Thread1of1ForFork0_i_24 v_N_19)) InVars {N=v_N_19, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_24, x=v_x_95} OutVars{N=v_N_19, thread1Thread1of1ForFork0_i=v_thread1Thread1of1ForFork0_i_23, x=v_x_94} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_i, x] 40#[L43-1, L19-1]don't care [2023-10-12 17:12:06,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:06,702 INFO L85 PathProgramCache]: Analyzing trace with hash 76252, now seen corresponding path program 1 times [2023-10-12 17:12:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:06,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946299372] [2023-10-12 17:12:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:06,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:06,824 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:06,836 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:06,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:06,838 INFO L85 PathProgramCache]: Analyzing trace with hash 117, now seen corresponding path program 1 times [2023-10-12 17:12:06,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:06,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072528966] [2023-10-12 17:12:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:06,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:06,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:06,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:06,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2363898, now seen corresponding path program 1 times [2023-10-12 17:12:06,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312786422] [2023-10-12 17:12:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:06,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:06,855 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:06,859 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:06,906 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:06,907 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:06,907 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:06,907 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:06,907 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:12:06,907 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:06,907 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:06,907 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:06,907 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration1_Loop [2023-10-12 17:12:06,907 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:06,907 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:06,918 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:06,928 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:06,963 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:06,963 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:12:06,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:06,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:06,966 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) [2023-10-12 17:12:06,969 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 [2023-10-12 17:12:07,076 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:12:07,077 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:07,108 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 [2023-10-12 17:12:07,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:07,110 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) [2023-10-12 17:12:07,112 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 [2023-10-12 17:12:07,113 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:12:07,114 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:07,137 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-10-12 17:12:07,137 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {x=0} Honda state: {x=0} Generalized eigenvectors: [{x=4}, {x=0}, {x=0}] Lambdas: [1, 0, 12] Nus: [0, 1] [2023-10-12 17:12:07,180 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 [2023-10-12 17:12:07,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:07,182 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) [2023-10-12 17:12:07,184 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 [2023-10-12 17:12:07,186 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:12:07,186 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:07,205 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 [2023-10-12 17:12:07,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:07,207 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) [2023-10-12 17:12:07,209 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 [2023-10-12 17:12:07,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:12:07,211 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:07,325 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:12:07,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2023-10-12 17:12:07,331 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:07,331 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:07,331 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:07,332 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:07,332 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:12:07,332 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,332 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:07,332 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:07,332 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration1_Loop [2023-10-12 17:12:07,332 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:07,332 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:07,333 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:07,338 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:07,378 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:07,382 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:12:07,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:07,395 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) [2023-10-12 17:12:07,420 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 [2023-10-12 17:12:07,425 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 [2023-10-12 17:12:07,441 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:12:07,442 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:12:07,442 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:12:07,442 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:12:07,442 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:12:07,445 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:12:07,445 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:12:07,458 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-10-12 17:12:07,463 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 [2023-10-12 17:12:07,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:07,464 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) [2023-10-12 17:12:07,467 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 [2023-10-12 17:12:07,468 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 [2023-10-12 17:12:07,474 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:12:07,475 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:12:07,475 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:12:07,475 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:12:07,475 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:12:07,476 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:12:07,476 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:12:07,492 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:12:07,497 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2023-10-12 17:12:07,497 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-10-12 17:12:07,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:07,501 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) [2023-10-12 17:12:07,502 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 [2023-10-12 17:12:07,503 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:12:07,503 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:12:07,503 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:12:07,504 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread1Thread1of1ForFork0_i, N) = -1*thread1Thread1of1ForFork0_i + 1*N Supporting invariants [] [2023-10-12 17:12:07,509 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 [2023-10-12 17:12:07,511 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:12:07,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:07,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:12:07,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:07,552 WARN L260 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:12:07,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:07,596 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 [2023-10-12 17:12:07,598 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) [2023-10-12 17:12:07,645 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. [2023-10-12 17:12:07,647 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 [2023-10-12 17:12:07,652 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) [2023-10-12 17:12:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2023-10-12 17:12:07,654 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 23 transitions. Stem has 3 letters. Loop has 1 letters. [2023-10-12 17:12:07,655 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:07,655 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 23 transitions. Stem has 4 letters. Loop has 1 letters. [2023-10-12 17:12:07,656 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:07,656 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 23 transitions. Stem has 3 letters. Loop has 2 letters. [2023-10-12 17:12:07,656 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:07,657 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 101 transitions. [2023-10-12 17:12:07,663 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2023-10-12 17:12:07,667 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 23 states and 53 transitions. [2023-10-12 17:12:07,668 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2023-10-12 17:12:07,668 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2023-10-12 17:12:07,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 53 transitions. [2023-10-12 17:12:07,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-10-12 17:12:07,669 INFO L219 hiAutomatonCegarLoop]: Abstraction has 23 states and 53 transitions. [2023-10-12 17:12:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 53 transitions. [2023-10-12 17:12:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-10-12 17:12:07,686 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) [2023-10-12 17:12:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 47 transitions. [2023-10-12 17:12:07,687 INFO L241 hiAutomatonCegarLoop]: Abstraction has 20 states and 47 transitions. [2023-10-12 17:12:07,687 INFO L430 stractBuchiCegarLoop]: Abstraction has 20 states and 47 transitions. [2023-10-12 17:12:07,687 INFO L337 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-10-12 17:12:07,687 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 47 transitions. [2023-10-12 17:12:07,689 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 4 [2023-10-12 17:12:07,689 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-10-12 17:12:07,689 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-10-12 17:12:07,689 INFO L149 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-10-12 17:12:07,689 INFO L150 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2023-10-12 17:12:07,690 INFO L748 eck$LassoCheckResult]: Stem: 185#[$Ultimate##0]don't care [46] $Ultimate##0-->L43: Formula: (= v_x_11 0) InVars {} OutVars{x=v_x_11} AuxVars[] AssignedVars[x] 179#[L43]don't care [71] L43-->$Ultimate##0: 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] 163#[L43-1, $Ultimate##0]don't care [74] L43-1-->$Ultimate##0: 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] 165#[L44, $Ultimate##0, $Ultimate##0]don't care [63] $Ultimate##0-->L33-1: Formula: (= v_thread2Thread1of1ForFork1_j_1 0) InVars {} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_1} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j] 149#[L44, L33-1, $Ultimate##0]don't care [2023-10-12 17:12:07,690 INFO L750 eck$LassoCheckResult]: Loop: 149#[L44, L33-1, $Ultimate##0]don't care [84] L33-1-->L33-1: Formula: (and (= (+ v_x_72 4) v_x_73) (= v_thread2Thread1of1ForFork1_j_23 (+ v_thread2Thread1of1ForFork1_j_24 1)) (< v_thread2Thread1of1ForFork1_j_24 v_N_11)) InVars {thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_24, N=v_N_11, x=v_x_73} OutVars{thread2Thread1of1ForFork1_j=v_thread2Thread1of1ForFork1_j_23, N=v_N_11, x=v_x_72} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_j, x] 149#[L44, L33-1, $Ultimate##0]don't care [2023-10-12 17:12:07,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:07,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2364495, now seen corresponding path program 1 times [2023-10-12 17:12:07,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:07,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099142436] [2023-10-12 17:12:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:07,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:07,699 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:07,704 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:07,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 115, now seen corresponding path program 1 times [2023-10-12 17:12:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:07,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511553092] [2023-10-12 17:12:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:07,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:07,713 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:07,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:07,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:07,726 INFO L85 PathProgramCache]: Analyzing trace with hash 73299429, now seen corresponding path program 1 times [2023-10-12 17:12:07,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-10-12 17:12:07,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566940784] [2023-10-12 17:12:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-10-12 17:12:07,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-10-12 17:12:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:07,736 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-10-12 17:12:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-10-12 17:12:07,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-10-12 17:12:07,753 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:07,754 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:07,754 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:07,754 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:07,754 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-10-12 17:12:07,754 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,754 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:07,754 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:07,754 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration2_Loop [2023-10-12 17:12:07,754 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:07,754 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:07,755 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:07,759 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:07,777 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:07,777 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-10-12 17:12:07,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:07,778 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) [2023-10-12 17:12:07,780 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 [2023-10-12 17:12:07,782 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-10-12 17:12:07,782 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:07,823 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 [2023-10-12 17:12:07,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:07,824 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) [2023-10-12 17:12:07,840 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-10-12 17:12:07,840 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-10-12 17:12:07,857 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 [2023-10-12 17:12:07,947 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-10-12 17:12:07,950 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 [2023-10-12 17:12:07,951 INFO L210 LassoAnalysis]: Preferences: [2023-10-12 17:12:07,951 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-10-12 17:12:07,951 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-10-12 17:12:07,951 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-10-12 17:12:07,951 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-10-12 17:12:07,951 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,951 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-10-12 17:12:07,951 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-10-12 17:12:07,951 INFO L133 ssoRankerPreferences]: Filename of dumped script: loop-lockstep-example.bpl_BEv2_Iteration2_Loop [2023-10-12 17:12:07,951 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-10-12 17:12:07,951 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-10-12 17:12:07,952 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:07,959 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-10-12 17:12:07,982 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-10-12 17:12:07,982 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-10-12 17:12:07,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:07,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:07,983 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) [2023-10-12 17:12:07,994 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 [2023-10-12 17:12:07,995 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 [2023-10-12 17:12:08,000 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-10-12 17:12:08,001 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-10-12 17:12:08,001 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-10-12 17:12:08,001 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-10-12 17:12:08,001 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-10-12 17:12:08,002 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-10-12 17:12:08,002 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-10-12 17:12:08,017 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-10-12 17:12:08,019 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-10-12 17:12:08,019 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-10-12 17:12:08,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-10-12 17:12:08,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-10-12 17:12:08,022 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) [2023-10-12 17:12:08,028 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-10-12 17:12:08,028 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-10-12 17:12:08,028 INFO L513 LassoAnalysis]: Proved termination. [2023-10-12 17:12:08,028 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(thread2Thread1of1ForFork1_j, N) = -1*thread2Thread1of1ForFork1_j + 1*N Supporting invariants [] [2023-10-12 17:12:08,033 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 [2023-10-12 17:12:08,033 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 [2023-10-12 17:12:08,034 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-10-12 17:12:08,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-10-12 17:12:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:08,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2023-10-12 17:12:08,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-10-12 17:12:08,067 WARN L260 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2023-10-12 17:12:08,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-10-12 17:12:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-10-12 17:12:08,068 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 [2023-10-12 17:12:08,068 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) [2023-10-12 17:12:08,081 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. [2023-10-12 17:12:08,081 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 [2023-10-12 17:12:08,082 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) [2023-10-12 17:12:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 17 transitions. [2023-10-12 17:12:08,082 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 17 transitions. Stem has 4 letters. Loop has 1 letters. [2023-10-12 17:12:08,082 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:08,082 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 17 transitions. Stem has 5 letters. Loop has 1 letters. [2023-10-12 17:12:08,082 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:08,082 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 17 transitions. Stem has 4 letters. Loop has 2 letters. [2023-10-12 17:12:08,082 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-10-12 17:12:08,082 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 81 transitions. [2023-10-12 17:12:08,083 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-10-12 17:12:08,083 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 0 states and 0 transitions. [2023-10-12 17:12:08,083 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-10-12 17:12:08,084 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-10-12 17:12:08,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-10-12 17:12:08,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-10-12 17:12:08,084 INFO L219 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-10-12 17:12:08,084 INFO L241 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-10-12 17:12:08,084 INFO L430 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-10-12 17:12:08,084 INFO L337 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-10-12 17:12:08,084 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-10-12 17:12:08,084 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-10-12 17:12:08,084 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-10-12 17:12:08,089 INFO L201 PluginConnector]: Adding new model loop-lockstep-example.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 12.10 05:12:08 BoogieIcfgContainer [2023-10-12 17:12:08,089 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-10-12 17:12:08,089 INFO L158 Benchmark]: Toolchain (without parser) took 2181.29ms. Allocated memory was 210.8MB in the beginning and 257.9MB in the end (delta: 47.2MB). Free memory was 163.9MB in the beginning and 174.8MB in the end (delta: -10.9MB). Peak memory consumption was 36.8MB. Max. memory is 8.0GB. [2023-10-12 17:12:08,090 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.25ms. Allocated memory is still 210.8MB. Free memory is still 164.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-10-12 17:12:08,090 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.87ms. Allocated memory is still 210.8MB. Free memory was 163.9MB in the beginning and 162.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-10-12 17:12:08,090 INFO L158 Benchmark]: Boogie Preprocessor took 16.05ms. Allocated memory is still 210.8MB. Free memory was 162.2MB in the beginning and 161.3MB in the end (delta: 909.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-10-12 17:12:08,090 INFO L158 Benchmark]: RCFGBuilder took 201.02ms. Allocated memory is still 210.8MB. Free memory was 161.2MB in the beginning and 182.1MB in the end (delta: -21.0MB). Peak memory consumption was 16.7MB. Max. memory is 8.0GB. [2023-10-12 17:12:08,091 INFO L158 Benchmark]: BuchiAutomizer took 1940.50ms. Allocated memory was 210.8MB in the beginning and 257.9MB in the end (delta: 47.2MB). Free memory was 182.1MB in the beginning and 174.8MB in the end (delta: 7.3MB). Peak memory consumption was 54.7MB. Max. memory is 8.0GB. [2023-10-12 17:12:08,092 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.25ms. Allocated memory is still 210.8MB. Free memory is still 164.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.87ms. Allocated memory is still 210.8MB. Free memory was 163.9MB in the beginning and 162.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.05ms. Allocated memory is still 210.8MB. Free memory was 162.2MB in the beginning and 161.3MB in the end (delta: 909.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 201.02ms. Allocated memory is still 210.8MB. Free memory was 161.2MB in the beginning and 182.1MB in the end (delta: -21.0MB). Peak memory consumption was 16.7MB. Max. memory is 8.0GB. * BuchiAutomizer took 1940.50ms. Allocated memory was 210.8MB in the beginning and 257.9MB in the end (delta: 47.2MB). Free memory was 182.1MB in the beginning and 174.8MB in the end (delta: 7.3MB). Peak memory consumption was 54.7MB. 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 1.8s and 3 iterations. TraceHistogramMax:1. Analysis of lassos took 1.1s. 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, 3 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: 75ms 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: 0.4s - 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: 0.3s, 28 PlacesBefore, 18 PlacesAfterwards, 23 TransitionsBefore, 13 TransitionsAfterwards, 138 CoEnabledTransitionPairs, 4 FixpointIterations, 1 TrivialSequentialCompositions, 9 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 110 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 110, independent: 110, independent conditional: 0, independent unconditional: 110, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 76, independent: 76, independent conditional: 0, independent unconditional: 76, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 76, independent: 68, independent conditional: 0, independent unconditional: 68, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, independent: 8, independent conditional: 0, independent unconditional: 8, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 60, independent: 60, independent conditional: 0, independent unconditional: 60, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 110, independent: 34, independent conditional: 0, independent unconditional: 34, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 76, unknown conditional: 0, unknown unconditional: 76] , 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, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 RESULT: Ultimate proved your program to be correct! [2023-10-12 17:12:08,103 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 [2023-10-12 17:12:08,302 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 [2023-10-12 17:12:08,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...