./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/termination.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 06d48bd39a18f705c3286a70a8cdcced2226e3b2a16c7a38c85f5398d4bcad34 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 23:48:51,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 23:48:51,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2024-10-24 23:48:51,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 23:48:51,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 23:48:51,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 23:48:51,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 23:48:51,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 23:48:51,618 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 23:48:51,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 23:48:51,620 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 23:48:51,621 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 23:48:51,621 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 23:48:51,621 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-10-24 23:48:51,624 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-10-24 23:48:51,625 INFO L153 SettingsManager]: * Use old map elimination=false [2024-10-24 23:48:51,625 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-10-24 23:48:51,625 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-10-24 23:48:51,625 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-10-24 23:48:51,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 23:48:51,626 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-10-24 23:48:51,626 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 23:48:51,627 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 23:48:51,628 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-10-24 23:48:51,628 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-10-24 23:48:51,628 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-10-24 23:48:51,629 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 23:48:51,629 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 23:48:51,629 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 23:48:51,629 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-10-24 23:48:51,630 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 23:48:51,630 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 23:48:51,630 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 23:48:51,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 23:48:51,631 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 23:48:51,631 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-10-24 23:48:51,632 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06d48bd39a18f705c3286a70a8cdcced2226e3b2a16c7a38c85f5398d4bcad34 [2024-10-24 23:48:51,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 23:48:51,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 23:48:51,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 23:48:51,938 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 23:48:51,938 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 23:48:51,940 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2024-10-24 23:48:53,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 23:48:53,648 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 23:48:53,649 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2024-10-24 23:48:53,656 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cce78ec2/2b2a09641ed848ba8b773faf7f9bbf34/FLAGb998213ca [2024-10-24 23:48:54,040 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cce78ec2/2b2a09641ed848ba8b773faf7f9bbf34 [2024-10-24 23:48:54,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 23:48:54,043 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 23:48:54,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 23:48:54,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 23:48:54,051 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 23:48:54,052 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,053 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d18374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54, skipping insertion in model container [2024-10-24 23:48:54,054 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,071 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 23:48:54,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 23:48:54,257 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 23:48:54,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 23:48:54,287 INFO L204 MainTranslator]: Completed translation [2024-10-24 23:48:54,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54 WrapperNode [2024-10-24 23:48:54,288 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 23:48:54,289 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 23:48:54,289 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 23:48:54,289 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 23:48:54,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,300 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,315 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 16 [2024-10-24 23:48:54,315 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 23:48:54,316 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 23:48:54,317 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 23:48:54,317 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 23:48:54,327 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,328 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,334 INFO L175 MemorySlicer]: No memory access in input program. [2024-10-24 23:48:54,335 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,335 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,336 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,341 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,343 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,344 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 23:48:54,345 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 23:48:54,346 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 23:48:54,346 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 23:48:54,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (1/1) ... [2024-10-24 23:48:54,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:54,378 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) [2024-10-24 23:48:54,386 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 [2024-10-24 23:48:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 23:48:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 23:48:54,509 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 23:48:54,512 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 23:48:54,585 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2024-10-24 23:48:54,585 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 23:48:54,602 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 23:48:54,602 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-24 23:48:54,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:48:54 BoogieIcfgContainer [2024-10-24 23:48:54,603 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 23:48:54,604 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-10-24 23:48:54,604 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-10-24 23:48:54,608 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-10-24 23:48:54,609 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-10-24 23:48:54,610 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 24.10 11:48:54" (1/3) ... [2024-10-24 23:48:54,611 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43ee8e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 24.10 11:48:54, skipping insertion in model container [2024-10-24 23:48:54,611 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-10-24 23:48:54,611 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:48:54" (2/3) ... [2024-10-24 23:48:54,612 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43ee8e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 24.10 11:48:54, skipping insertion in model container [2024-10-24 23:48:54,612 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-10-24 23:48:54,612 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:48:54" (3/3) ... [2024-10-24 23:48:54,615 INFO L332 chiAutomizerObserver]: Analyzing ICFG GopanReps-CAV2006-Fig1a.c [2024-10-24 23:48:54,726 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-10-24 23:48:54,727 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-10-24 23:48:54,727 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-10-24 23:48:54,727 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-10-24 23:48:54,727 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-10-24 23:48:54,727 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-10-24 23:48:54,728 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-10-24 23:48:54,728 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-10-24 23:48:54,733 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2024-10-24 23:48:54,748 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-10-24 23:48:54,748 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-24 23:48:54,749 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-24 23:48:54,753 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2024-10-24 23:48:54,754 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-10-24 23:48:54,754 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-10-24 23:48:54,754 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2024-10-24 23:48:54,755 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-10-24 23:48:54,756 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-24 23:48:54,756 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-24 23:48:54,756 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2024-10-24 23:48:54,756 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-10-24 23:48:54,764 INFO L745 eck$LassoCheckResult]: Stem: 7#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := 0;main_~y~0#1 := 0; 5#L18-2true [2024-10-24 23:48:54,764 INFO L747 eck$LassoCheckResult]: Loop: 5#L18-2true assume !!(main_~y~0#1 >= 0); 9#L19true assume !(main_~x~0#1 <= 50);main_~y~0#1 := main_~y~0#1 - 1; 2#L19-2true main_~x~0#1 := 1 + main_~x~0#1; 5#L18-2true [2024-10-24 23:48:54,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:54,770 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2024-10-24 23:48:54,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:54,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655869092] [2024-10-24 23:48:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:54,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:54,854 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 23:48:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:54,876 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 23:48:54,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash 40876, now seen corresponding path program 1 times [2024-10-24 23:48:54,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:54,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825600060] [2024-10-24 23:48:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:54,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:54,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 23:48:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:54,902 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 23:48:54,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:54,904 INFO L85 PathProgramCache]: Analyzing trace with hash 28699818, now seen corresponding path program 1 times [2024-10-24 23:48:54,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:54,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878789709] [2024-10-24 23:48:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:54,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:54,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:48:54,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878789709] [2024-10-24 23:48:54,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878789709] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 23:48:54,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 23:48:54,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 23:48:54,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436986154] [2024-10-24 23:48:54,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 23:48:55,061 INFO L204 LassoAnalysis]: Preferences: [2024-10-24 23:48:55,062 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-10-24 23:48:55,062 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-10-24 23:48:55,062 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-10-24 23:48:55,062 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-10-24 23:48:55,062 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,062 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-10-24 23:48:55,062 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-10-24 23:48:55,063 INFO L132 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration1_Loop [2024-10-24 23:48:55,063 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-10-24 23:48:55,063 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-10-24 23:48:55,076 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:55,086 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:55,092 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:55,101 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:55,190 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-10-24 23:48:55,191 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-10-24 23:48:55,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:55,197 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) [2024-10-24 23:48:55,198 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 [2024-10-24 23:48:55,199 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:55,199 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:55,223 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-10-24 23:48:55,224 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-10-24 23:48:55,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2024-10-24 23:48:55,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:55,238 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) [2024-10-24 23:48:55,240 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 [2024-10-24 23:48:55,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:55,242 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:55,267 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-10-24 23:48:55,267 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-10-24 23:48:55,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2024-10-24 23:48:55,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:55,283 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) [2024-10-24 23:48:55,284 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 [2024-10-24 23:48:55,284 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:55,285 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:55,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2024-10-24 23:48:55,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:55,309 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) [2024-10-24 23:48:55,311 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 [2024-10-24 23:48:55,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-10-24 23:48:55,313 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:55,349 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-10-24 23:48:55,354 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 [2024-10-24 23:48:55,354 INFO L204 LassoAnalysis]: Preferences: [2024-10-24 23:48:55,354 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-10-24 23:48:55,355 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-10-24 23:48:55,355 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-10-24 23:48:55,355 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-10-24 23:48:55,355 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,355 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-10-24 23:48:55,355 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-10-24 23:48:55,356 INFO L132 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration1_Loop [2024-10-24 23:48:55,356 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-10-24 23:48:55,356 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-10-24 23:48:55,358 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:55,363 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:55,369 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:55,378 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:55,444 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-10-24 23:48:55,449 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-10-24 23:48:55,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:55,453 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) [2024-10-24 23:48:55,455 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 [2024-10-24 23:48:55,456 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 [2024-10-24 23:48:55,469 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-10-24 23:48:55,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-10-24 23:48:55,470 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-10-24 23:48:55,471 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-10-24 23:48:55,478 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2024-10-24 23:48:55,478 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2024-10-24 23:48:55,487 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-10-24 23:48:55,502 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 [2024-10-24 23:48:55,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:55,504 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) [2024-10-24 23:48:55,505 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 [2024-10-24 23:48:55,506 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 [2024-10-24 23:48:55,516 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-10-24 23:48:55,517 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-10-24 23:48:55,517 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-10-24 23:48:55,517 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-10-24 23:48:55,522 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2024-10-24 23:48:55,522 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2024-10-24 23:48:55,529 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-10-24 23:48:55,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2024-10-24 23:48:55,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:55,548 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) [2024-10-24 23:48:55,549 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 [2024-10-24 23:48:55,550 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 [2024-10-24 23:48:55,560 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-10-24 23:48:55,560 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-10-24 23:48:55,561 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-10-24 23:48:55,561 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-10-24 23:48:55,561 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-10-24 23:48:55,562 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-10-24 23:48:55,562 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-10-24 23:48:55,565 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-10-24 23:48:55,568 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-10-24 23:48:55,569 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-10-24 23:48:55,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:55,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:55,596 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) [2024-10-24 23:48:55,597 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 [2024-10-24 23:48:55,598 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-10-24 23:48:55,598 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-10-24 23:48:55,598 INFO L474 LassoAnalysis]: Proved termination. [2024-10-24 23:48:55,598 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1) = 2*ULTIMATE.start_main_~y~0#1 + 1 Supporting invariants [] [2024-10-24 23:48:55,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2024-10-24 23:48:55,613 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-10-24 23:48:55,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:55,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 23:48:55,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:55,676 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 23:48:55,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:55,784 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2024-10-24 23:48:55,786 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2024-10-24 23:48:55,831 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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 21 states and 28 transitions. Complement of second has 8 states. [2024-10-24 23:48:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2024-10-24 23:48:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2024-10-24 23:48:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2024-10-24 23:48:55,842 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 2 letters. Loop has 3 letters. [2024-10-24 23:48:55,842 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:55,842 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 5 letters. Loop has 3 letters. [2024-10-24 23:48:55,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:55,843 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 2 letters. Loop has 6 letters. [2024-10-24 23:48:55,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:55,843 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 28 transitions. [2024-10-24 23:48:55,845 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-10-24 23:48:55,848 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 12 states and 15 transitions. [2024-10-24 23:48:55,849 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2024-10-24 23:48:55,849 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2024-10-24 23:48:55,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2024-10-24 23:48:55,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-10-24 23:48:55,850 INFO L218 hiAutomatonCegarLoop]: Abstraction has 12 states and 15 transitions. [2024-10-24 23:48:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2024-10-24 23:48:55,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2024-10-24 23:48:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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) [2024-10-24 23:48:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2024-10-24 23:48:55,871 INFO L240 hiAutomatonCegarLoop]: Abstraction has 11 states and 14 transitions. [2024-10-24 23:48:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:48:55,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 23:48:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 23:48:55,874 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2024-10-24 23:48:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 23:48:55,883 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2024-10-24 23:48:55,884 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2024-10-24 23:48:55,884 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-10-24 23:48:55,884 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 8 states and 9 transitions. [2024-10-24 23:48:55,884 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2024-10-24 23:48:55,885 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2024-10-24 23:48:55,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2024-10-24 23:48:55,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-10-24 23:48:55,885 INFO L218 hiAutomatonCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-10-24 23:48:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2024-10-24 23:48:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2024-10-24 23:48:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-10-24 23:48:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2024-10-24 23:48:55,886 INFO L240 hiAutomatonCegarLoop]: Abstraction has 7 states and 8 transitions. [2024-10-24 23:48:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 23:48:55,887 INFO L425 stractBuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2024-10-24 23:48:55,887 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-10-24 23:48:55,887 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2024-10-24 23:48:55,888 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-10-24 23:48:55,888 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-24 23:48:55,888 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-24 23:48:55,888 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2024-10-24 23:48:55,888 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-10-24 23:48:55,889 INFO L745 eck$LassoCheckResult]: Stem: 97#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 98#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := 0;main_~y~0#1 := 0; 99#L18-2 assume !!(main_~y~0#1 >= 0); 100#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 94#L19-2 [2024-10-24 23:48:55,889 INFO L747 eck$LassoCheckResult]: Loop: 94#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 95#L18-2 assume !!(main_~y~0#1 >= 0); 96#L19 assume !(main_~x~0#1 <= 50);main_~y~0#1 := main_~y~0#1 - 1; 94#L19-2 [2024-10-24 23:48:55,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:55,889 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2024-10-24 23:48:55,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:55,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225069850] [2024-10-24 23:48:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:55,894 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 23:48:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:55,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 23:48:55,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash 47446, now seen corresponding path program 2 times [2024-10-24 23:48:55,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:55,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28360261] [2024-10-24 23:48:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:55,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:55,904 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 23:48:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:55,909 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 23:48:55,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:55,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1810662097, now seen corresponding path program 1 times [2024-10-24 23:48:55,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:55,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846848662] [2024-10-24 23:48:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:55,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:55,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:48:55,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846848662] [2024-10-24 23:48:55,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846848662] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 23:48:55,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772881522] [2024-10-24 23:48:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:55,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:48:55,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:55,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 23:48:55,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 23:48:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:56,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 23:48:56,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:56,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 23:48:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:56,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772881522] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 23:48:56,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 23:48:56,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-24 23:48:56,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921469909] [2024-10-24 23:48:56,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 23:48:56,089 INFO L204 LassoAnalysis]: Preferences: [2024-10-24 23:48:56,089 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-10-24 23:48:56,089 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-10-24 23:48:56,089 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-10-24 23:48:56,090 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-10-24 23:48:56,090 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,090 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-10-24 23:48:56,090 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-10-24 23:48:56,090 INFO L132 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration2_Loop [2024-10-24 23:48:56,090 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-10-24 23:48:56,090 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-10-24 23:48:56,092 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:56,097 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:56,104 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:56,107 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:56,157 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-10-24 23:48:56,157 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-10-24 23:48:56,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,161 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) [2024-10-24 23:48:56,162 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 [2024-10-24 23:48:56,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:56,163 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:56,187 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-10-24 23:48:56,187 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-10-24 23:48:56,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2024-10-24 23:48:56,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,206 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) [2024-10-24 23:48:56,209 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 [2024-10-24 23:48:56,210 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:56,210 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:56,241 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 [2024-10-24 23:48:56,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,243 INFO L229 MonitoredProcess]: Starting monitored process 13 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) [2024-10-24 23:48:56,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2024-10-24 23:48:56,246 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-10-24 23:48:56,246 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:56,304 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-10-24 23:48:56,304 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=50} Honda state: {ULTIMATE.start_main_~x~0#1=50} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0#1=1}, {ULTIMATE.start_main_~x~0#1=0}, {ULTIMATE.start_main_~x~0#1=0}] Lambdas: [1, 6, 7] Nus: [1, 0] [2024-10-24 23:48:56,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2024-10-24 23:48:56,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,322 INFO L229 MonitoredProcess]: Starting monitored process 14 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) [2024-10-24 23:48:56,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2024-10-24 23:48:56,325 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:56,325 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:56,344 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-10-24 23:48:56,344 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-10-24 23:48:56,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:56,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,357 INFO L229 MonitoredProcess]: Starting monitored process 15 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) [2024-10-24 23:48:56,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2024-10-24 23:48:56,358 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:56,358 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:56,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:56,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,383 INFO L229 MonitoredProcess]: Starting monitored process 16 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) [2024-10-24 23:48:56,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2024-10-24 23:48:56,385 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-10-24 23:48:56,385 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:56,411 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-10-24 23:48:56,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2024-10-24 23:48:56,416 INFO L204 LassoAnalysis]: Preferences: [2024-10-24 23:48:56,416 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-10-24 23:48:56,416 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-10-24 23:48:56,416 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-10-24 23:48:56,416 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-10-24 23:48:56,416 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,416 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-10-24 23:48:56,417 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-10-24 23:48:56,417 INFO L132 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration2_Loop [2024-10-24 23:48:56,417 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-10-24 23:48:56,417 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-10-24 23:48:56,418 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:56,422 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:56,427 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:56,435 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:56,486 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-10-24 23:48:56,486 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-10-24 23:48:56,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,488 INFO L229 MonitoredProcess]: Starting monitored process 17 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) [2024-10-24 23:48:56,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2024-10-24 23:48:56,491 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 [2024-10-24 23:48:56,501 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-10-24 23:48:56,501 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-10-24 23:48:56,501 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-10-24 23:48:56,501 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-10-24 23:48:56,504 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2024-10-24 23:48:56,504 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2024-10-24 23:48:56,508 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-10-24 23:48:56,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2024-10-24 23:48:56,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,526 INFO L229 MonitoredProcess]: Starting monitored process 18 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) [2024-10-24 23:48:56,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2024-10-24 23:48:56,528 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 [2024-10-24 23:48:56,541 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-10-24 23:48:56,541 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-10-24 23:48:56,541 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-10-24 23:48:56,542 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-10-24 23:48:56,542 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-10-24 23:48:56,543 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-10-24 23:48:56,543 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-10-24 23:48:56,549 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-10-24 23:48:56,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2024-10-24 23:48:56,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,567 INFO L229 MonitoredProcess]: Starting monitored process 19 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) [2024-10-24 23:48:56,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2024-10-24 23:48:56,572 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 [2024-10-24 23:48:56,585 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-10-24 23:48:56,585 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-10-24 23:48:56,585 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-10-24 23:48:56,585 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-10-24 23:48:56,585 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-10-24 23:48:56,587 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-10-24 23:48:56,587 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-10-24 23:48:56,589 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-10-24 23:48:56,591 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-10-24 23:48:56,592 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-10-24 23:48:56,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:56,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,594 INFO L229 MonitoredProcess]: Starting monitored process 20 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) [2024-10-24 23:48:56,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2024-10-24 23:48:56,597 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-10-24 23:48:56,597 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-10-24 23:48:56,597 INFO L474 LassoAnalysis]: Proved termination. [2024-10-24 23:48:56,597 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1) = 2*ULTIMATE.start_main_~y~0#1 + 1 Supporting invariants [] [2024-10-24 23:48:56,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2024-10-24 23:48:56,637 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-10-24 23:48:56,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:56,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 23:48:56,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:56,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2024-10-24 23:48:56,675 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 [2024-10-24 23:48:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:56,679 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 23:48:56,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:56,705 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2024-10-24 23:48:56,705 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-10-24 23:48:56,728 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 13 states and 16 transitions. Complement of second has 7 states. [2024-10-24 23:48:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2024-10-24 23:48:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-10-24 23:48:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2024-10-24 23:48:56,730 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 4 letters. Loop has 3 letters. [2024-10-24 23:48:56,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:56,731 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 7 letters. Loop has 3 letters. [2024-10-24 23:48:56,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:56,731 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 4 letters. Loop has 6 letters. [2024-10-24 23:48:56,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:56,731 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2024-10-24 23:48:56,732 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-10-24 23:48:56,732 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 16 transitions. [2024-10-24 23:48:56,733 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2024-10-24 23:48:56,733 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2024-10-24 23:48:56,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 16 transitions. [2024-10-24 23:48:56,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-10-24 23:48:56,733 INFO L218 hiAutomatonCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-10-24 23:48:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 16 transitions. [2024-10-24 23:48:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-24 23:48:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 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) [2024-10-24 23:48:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-10-24 23:48:56,735 INFO L240 hiAutomatonCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-10-24 23:48:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:48:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 23:48:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-24 23:48:56,736 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-10-24 23:48:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 23:48:56,757 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2024-10-24 23:48:56,758 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 20 transitions. [2024-10-24 23:48:56,759 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2024-10-24 23:48:56,761 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 17 states and 18 transitions. [2024-10-24 23:48:56,761 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2024-10-24 23:48:56,761 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2024-10-24 23:48:56,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 18 transitions. [2024-10-24 23:48:56,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-10-24 23:48:56,762 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-10-24 23:48:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 18 transitions. [2024-10-24 23:48:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2024-10-24 23:48:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.0625) internal successors, (17), 15 states have internal predecessors, (17), 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) [2024-10-24 23:48:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-10-24 23:48:56,767 INFO L240 hiAutomatonCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-10-24 23:48:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 23:48:56,768 INFO L425 stractBuchiCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-10-24 23:48:56,769 INFO L332 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-10-24 23:48:56,769 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 17 transitions. [2024-10-24 23:48:56,769 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-10-24 23:48:56,770 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-24 23:48:56,770 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-24 23:48:56,770 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1] [2024-10-24 23:48:56,771 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-10-24 23:48:56,771 INFO L745 eck$LassoCheckResult]: Stem: 234#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 235#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := 0;main_~y~0#1 := 0; 232#L18-2 assume !!(main_~y~0#1 >= 0); 233#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 230#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 231#L18-2 assume !!(main_~y~0#1 >= 0); 245#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 244#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 243#L18-2 assume !!(main_~y~0#1 >= 0); 242#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 241#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 240#L18-2 assume !!(main_~y~0#1 >= 0); 239#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 237#L19-2 [2024-10-24 23:48:56,771 INFO L747 eck$LassoCheckResult]: Loop: 237#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 238#L18-2 assume !!(main_~y~0#1 >= 0); 236#L19 assume !(main_~x~0#1 <= 50);main_~y~0#1 := main_~y~0#1 - 1; 237#L19-2 [2024-10-24 23:48:56,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:56,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1702507665, now seen corresponding path program 1 times [2024-10-24 23:48:56,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:56,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71408475] [2024-10-24 23:48:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:56,782 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 23:48:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:56,791 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 23:48:56,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:56,791 INFO L85 PathProgramCache]: Analyzing trace with hash 47446, now seen corresponding path program 3 times [2024-10-24 23:48:56,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:56,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826558300] [2024-10-24 23:48:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:56,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:56,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 23:48:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:56,800 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 23:48:56,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:56,801 INFO L85 PathProgramCache]: Analyzing trace with hash -137031896, now seen corresponding path program 2 times [2024-10-24 23:48:56,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:56,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009250700] [2024-10-24 23:48:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:56,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 23:48:56,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009250700] [2024-10-24 23:48:56,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009250700] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 23:48:56,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416561245] [2024-10-24 23:48:56,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 23:48:56,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 23:48:56,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:56,946 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 23:48:56,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-24 23:48:56,975 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 23:48:56,975 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 23:48:56,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 23:48:56,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:57,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 23:48:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:57,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416561245] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 23:48:57,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 23:48:57,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-24 23:48:57,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635461641] [2024-10-24 23:48:57,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 23:48:57,139 INFO L204 LassoAnalysis]: Preferences: [2024-10-24 23:48:57,140 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-10-24 23:48:57,140 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-10-24 23:48:57,140 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-10-24 23:48:57,140 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-10-24 23:48:57,140 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,140 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-10-24 23:48:57,140 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-10-24 23:48:57,140 INFO L132 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration3_Loop [2024-10-24 23:48:57,140 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-10-24 23:48:57,140 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-10-24 23:48:57,141 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,146 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,154 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,157 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,203 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-10-24 23:48:57,203 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-10-24 23:48:57,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:57,205 INFO L229 MonitoredProcess]: Starting monitored process 22 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) [2024-10-24 23:48:57,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2024-10-24 23:48:57,208 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:57,208 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:57,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2024-10-24 23:48:57,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:57,240 INFO L229 MonitoredProcess]: Starting monitored process 23 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) [2024-10-24 23:48:57,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2024-10-24 23:48:57,243 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-10-24 23:48:57,243 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:57,297 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-10-24 23:48:57,297 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=50} Honda state: {ULTIMATE.start_main_~x~0#1=50} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0#1=1}, {ULTIMATE.start_main_~x~0#1=0}, {ULTIMATE.start_main_~x~0#1=0}] Lambdas: [1, 6, 7] Nus: [1, 0] [2024-10-24 23:48:57,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:57,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:57,310 INFO L229 MonitoredProcess]: Starting monitored process 24 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) [2024-10-24 23:48:57,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2024-10-24 23:48:57,312 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:57,312 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:57,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:57,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:57,338 INFO L229 MonitoredProcess]: Starting monitored process 25 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) [2024-10-24 23:48:57,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2024-10-24 23:48:57,341 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-10-24 23:48:57,342 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:57,369 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-10-24 23:48:57,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:57,373 INFO L204 LassoAnalysis]: Preferences: [2024-10-24 23:48:57,374 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-10-24 23:48:57,374 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-10-24 23:48:57,374 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-10-24 23:48:57,374 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-10-24 23:48:57,374 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,374 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-10-24 23:48:57,374 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-10-24 23:48:57,374 INFO L132 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration3_Loop [2024-10-24 23:48:57,374 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-10-24 23:48:57,374 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-10-24 23:48:57,375 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,382 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,387 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,390 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,443 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-10-24 23:48:57,443 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-10-24 23:48:57,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:57,446 INFO L229 MonitoredProcess]: Starting monitored process 26 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) [2024-10-24 23:48:57,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2024-10-24 23:48:57,448 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 [2024-10-24 23:48:57,461 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-10-24 23:48:57,461 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-10-24 23:48:57,461 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-10-24 23:48:57,461 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-10-24 23:48:57,462 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-10-24 23:48:57,462 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-10-24 23:48:57,462 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-10-24 23:48:57,465 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-10-24 23:48:57,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2024-10-24 23:48:57,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:57,482 INFO L229 MonitoredProcess]: Starting monitored process 27 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) [2024-10-24 23:48:57,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2024-10-24 23:48:57,487 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 [2024-10-24 23:48:57,501 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-10-24 23:48:57,501 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-10-24 23:48:57,501 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-10-24 23:48:57,501 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-10-24 23:48:57,501 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-10-24 23:48:57,505 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-10-24 23:48:57,505 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-10-24 23:48:57,507 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-10-24 23:48:57,510 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-10-24 23:48:57,510 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-10-24 23:48:57,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:57,512 INFO L229 MonitoredProcess]: Starting monitored process 28 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) [2024-10-24 23:48:57,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2024-10-24 23:48:57,514 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-10-24 23:48:57,514 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-10-24 23:48:57,514 INFO L474 LassoAnalysis]: Proved termination. [2024-10-24 23:48:57,515 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1) = 2*ULTIMATE.start_main_~y~0#1 + 1 Supporting invariants [] [2024-10-24 23:48:57,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:57,530 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-10-24 23:48:57,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:57,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 23:48:57,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:57,586 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 23:48:57,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:57,607 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2024-10-24 23:48:57,607 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-24 23:48:57,624 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 18 states and 19 transitions. Complement of second has 7 states. [2024-10-24 23:48:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2024-10-24 23:48:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-24 23:48:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2024-10-24 23:48:57,628 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 13 letters. Loop has 3 letters. [2024-10-24 23:48:57,629 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:57,629 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-10-24 23:48:57,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:57,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 23:48:57,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:57,684 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 23:48:57,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:57,703 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2024-10-24 23:48:57,704 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-24 23:48:57,719 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 18 states and 19 transitions. Complement of second has 7 states. [2024-10-24 23:48:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2024-10-24 23:48:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-24 23:48:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2024-10-24 23:48:57,721 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 13 letters. Loop has 3 letters. [2024-10-24 23:48:57,721 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:57,721 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-10-24 23:48:57,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:57,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 23:48:57,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:57,769 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 23:48:57,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:57,788 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2024-10-24 23:48:57,789 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-24 23:48:57,804 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 17 transitions. cyclomatic complexity: 2. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 25 states and 27 transitions. Complement of second has 6 states. [2024-10-24 23:48:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2024-10-24 23:48:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-24 23:48:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2024-10-24 23:48:57,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 13 letters. Loop has 3 letters. [2024-10-24 23:48:57,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:57,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 16 letters. Loop has 3 letters. [2024-10-24 23:48:57,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:57,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 13 letters. Loop has 6 letters. [2024-10-24 23:48:57,807 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:57,807 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 27 transitions. [2024-10-24 23:48:57,807 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2024-10-24 23:48:57,808 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 19 states and 21 transitions. [2024-10-24 23:48:57,808 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2024-10-24 23:48:57,808 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2024-10-24 23:48:57,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2024-10-24 23:48:57,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-10-24 23:48:57,808 INFO L218 hiAutomatonCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-10-24 23:48:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2024-10-24 23:48:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2024-10-24 23:48:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 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) [2024-10-24 23:48:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-10-24 23:48:57,810 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-10-24 23:48:57,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 23:48:57,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 23:48:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-24 23:48:57,811 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-10-24 23:48:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 23:48:57,845 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-10-24 23:48:57,845 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 51 transitions. [2024-10-24 23:48:57,847 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2024-10-24 23:48:57,848 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 37 states and 39 transitions. [2024-10-24 23:48:57,848 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 34 [2024-10-24 23:48:57,848 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 34 [2024-10-24 23:48:57,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 39 transitions. [2024-10-24 23:48:57,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-10-24 23:48:57,849 INFO L218 hiAutomatonCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-10-24 23:48:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 39 transitions. [2024-10-24 23:48:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-10-24 23:48:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 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) [2024-10-24 23:48:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2024-10-24 23:48:57,852 INFO L240 hiAutomatonCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-10-24 23:48:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 23:48:57,855 INFO L425 stractBuchiCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-10-24 23:48:57,856 INFO L332 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-10-24 23:48:57,856 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 37 transitions. [2024-10-24 23:48:57,856 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2024-10-24 23:48:57,856 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-10-24 23:48:57,857 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-10-24 23:48:57,857 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [9, 9, 9, 1, 1] [2024-10-24 23:48:57,857 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-10-24 23:48:57,857 INFO L745 eck$LassoCheckResult]: Stem: 662#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 663#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~x~0#1, main_~y~0#1;havoc main_~x~0#1;havoc main_~y~0#1;main_~x~0#1 := 0;main_~y~0#1 := 0; 665#L18-2 assume !!(main_~y~0#1 >= 0); 689#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 655#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 656#L18-2 assume !!(main_~y~0#1 >= 0); 660#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 664#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 688#L18-2 assume !!(main_~y~0#1 >= 0); 687#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 686#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 685#L18-2 assume !!(main_~y~0#1 >= 0); 684#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 683#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 682#L18-2 assume !!(main_~y~0#1 >= 0); 681#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 680#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 679#L18-2 assume !!(main_~y~0#1 >= 0); 678#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 677#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 676#L18-2 assume !!(main_~y~0#1 >= 0); 675#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 674#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 673#L18-2 assume !!(main_~y~0#1 >= 0); 672#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 671#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 670#L18-2 assume !!(main_~y~0#1 >= 0); 669#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 668#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 659#L18-2 [2024-10-24 23:48:57,858 INFO L747 eck$LassoCheckResult]: Loop: 659#L18-2 assume !!(main_~y~0#1 >= 0); 667#L19 assume main_~x~0#1 <= 50;main_~y~0#1 := 1 + main_~y~0#1; 666#L19-2 main_~x~0#1 := 1 + main_~x~0#1; 659#L18-2 [2024-10-24 23:48:57,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash -191897876, now seen corresponding path program 2 times [2024-10-24 23:48:57,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:57,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616935714] [2024-10-24 23:48:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:57,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:57,884 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 23:48:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:57,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 23:48:57,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:57,904 INFO L85 PathProgramCache]: Analyzing trace with hash 40814, now seen corresponding path program 1 times [2024-10-24 23:48:57,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:57,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094259897] [2024-10-24 23:48:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:57,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:57,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 23:48:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:57,910 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 23:48:57,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash -228141917, now seen corresponding path program 3 times [2024-10-24 23:48:57,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 23:48:57,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885460635] [2024-10-24 23:48:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 23:48:57,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 23:48:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:57,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 23:48:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 23:48:57,944 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 23:48:57,974 INFO L204 LassoAnalysis]: Preferences: [2024-10-24 23:48:57,975 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-10-24 23:48:57,975 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-10-24 23:48:57,975 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-10-24 23:48:57,975 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-10-24 23:48:57,975 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:57,975 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-10-24 23:48:57,975 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-10-24 23:48:57,975 INFO L132 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration4_Loop [2024-10-24 23:48:57,975 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-10-24 23:48:57,975 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-10-24 23:48:57,976 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,982 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,986 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:57,989 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:58,030 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-10-24 23:48:58,030 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-10-24 23:48:58,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:58,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:58,032 INFO L229 MonitoredProcess]: Starting monitored process 29 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) [2024-10-24 23:48:58,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2024-10-24 23:48:58,033 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-10-24 23:48:58,034 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:58,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2024-10-24 23:48:58,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:58,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:58,056 INFO L229 MonitoredProcess]: Starting monitored process 30 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) [2024-10-24 23:48:58,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2024-10-24 23:48:58,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-10-24 23:48:58,058 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-10-24 23:48:58,085 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-10-24 23:48:58,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:58,090 INFO L204 LassoAnalysis]: Preferences: [2024-10-24 23:48:58,090 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-10-24 23:48:58,090 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-10-24 23:48:58,090 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-10-24 23:48:58,090 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-10-24 23:48:58,090 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:58,090 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-10-24 23:48:58,090 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-10-24 23:48:58,090 INFO L132 ssoRankerPreferences]: Filename of dumped script: GopanReps-CAV2006-Fig1a.c_Iteration4_Loop [2024-10-24 23:48:58,090 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-10-24 23:48:58,090 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-10-24 23:48:58,092 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:58,098 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:58,102 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:58,105 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-10-24 23:48:58,141 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-10-24 23:48:58,141 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-10-24 23:48:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:58,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:58,143 INFO L229 MonitoredProcess]: Starting monitored process 31 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) [2024-10-24 23:48:58,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2024-10-24 23:48:58,145 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 [2024-10-24 23:48:58,154 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-10-24 23:48:58,155 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-10-24 23:48:58,155 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-10-24 23:48:58,155 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-10-24 23:48:58,155 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-10-24 23:48:58,155 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-10-24 23:48:58,156 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-10-24 23:48:58,157 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-10-24 23:48:58,159 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-10-24 23:48:58,159 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-10-24 23:48:58,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-10-24 23:48:58,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 23:48:58,161 INFO L229 MonitoredProcess]: Starting monitored process 32 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) [2024-10-24 23:48:58,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2024-10-24 23:48:58,162 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-10-24 23:48:58,162 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-10-24 23:48:58,162 INFO L474 LassoAnalysis]: Proved termination. [2024-10-24 23:48:58,162 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0#1) = -2*ULTIMATE.start_main_~x~0#1 + 101 Supporting invariants [] [2024-10-24 23:48:58,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2024-10-24 23:48:58,173 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-10-24 23:48:58,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 23:48:58,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2024-10-24 23:48:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:58,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 23:48:58,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:58,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 23:48:58,268 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 23:48:58,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 23:48:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 23:48:58,285 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2024-10-24 23:48:58,285 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 37 transitions. cyclomatic complexity: 3 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-24 23:48:58,304 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 37 transitions. cyclomatic complexity: 3. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 61 states and 65 transitions. Complement of second has 6 states. [2024-10-24 23:48:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2024-10-24 23:48:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-10-24 23:48:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2024-10-24 23:48:58,306 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 29 letters. Loop has 3 letters. [2024-10-24 23:48:58,306 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:58,306 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 32 letters. Loop has 3 letters. [2024-10-24 23:48:58,307 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:58,307 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 29 letters. Loop has 6 letters. [2024-10-24 23:48:58,307 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-10-24 23:48:58,307 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 61 states and 65 transitions. [2024-10-24 23:48:58,308 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-10-24 23:48:58,309 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 61 states to 0 states and 0 transitions. [2024-10-24 23:48:58,309 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-10-24 23:48:58,309 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-10-24 23:48:58,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-10-24 23:48:58,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-10-24 23:48:58,309 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-24 23:48:58,309 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-24 23:48:58,309 INFO L425 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-24 23:48:58,309 INFO L332 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2024-10-24 23:48:58,309 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2024-10-24 23:48:58,309 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-10-24 23:48:58,309 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2024-10-24 23:48:58,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 24.10 11:48:58 BoogieIcfgContainer [2024-10-24 23:48:58,317 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-10-24 23:48:58,318 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-24 23:48:58,318 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-24 23:48:58,318 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-24 23:48:58,319 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:48:54" (3/4) ... [2024-10-24 23:48:58,323 INFO L142 WitnessPrinter]: No result that supports witness generation found [2024-10-24 23:48:58,324 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-24 23:48:58,324 INFO L158 Benchmark]: Toolchain (without parser) took 4281.13ms. Allocated memory is still 165.7MB. Free memory was 96.2MB in the beginning and 123.4MB in the end (delta: -27.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 23:48:58,325 INFO L158 Benchmark]: CDTParser took 0.63ms. Allocated memory is still 113.2MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 23:48:58,325 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.35ms. Allocated memory is still 165.7MB. Free memory was 96.0MB in the beginning and 85.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-24 23:48:58,326 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.70ms. Allocated memory is still 165.7MB. Free memory was 84.9MB in the beginning and 83.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-24 23:48:58,326 INFO L158 Benchmark]: Boogie Preprocessor took 28.07ms. Allocated memory is still 165.7MB. Free memory was 83.7MB in the beginning and 82.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 23:48:58,329 INFO L158 Benchmark]: RCFGBuilder took 257.74ms. Allocated memory is still 165.7MB. Free memory was 82.2MB in the beginning and 73.2MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-10-24 23:48:58,329 INFO L158 Benchmark]: BuchiAutomizer took 3713.43ms. Allocated memory is still 165.7MB. Free memory was 73.0MB in the beginning and 123.4MB in the end (delta: -50.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 23:48:58,329 INFO L158 Benchmark]: Witness Printer took 6.06ms. Allocated memory is still 165.7MB. Free memory is still 123.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 23:48:58,331 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63ms. Allocated memory is still 113.2MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.35ms. Allocated memory is still 165.7MB. Free memory was 96.0MB in the beginning and 85.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.70ms. Allocated memory is still 165.7MB. Free memory was 84.9MB in the beginning and 83.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.07ms. Allocated memory is still 165.7MB. Free memory was 83.7MB in the beginning and 82.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 257.74ms. Allocated memory is still 165.7MB. Free memory was 82.2MB in the beginning and 73.2MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 3713.43ms. Allocated memory is still 165.7MB. Free memory was 73.0MB in the beginning and 123.4MB in the end (delta: -50.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.06ms. Allocated memory is still 165.7MB. Free memory is still 123.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (3 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function (((long) 2 * y) + 1) and consists of 5 locations. One deterministic module has affine ranking function (((long) 2 * y) + 1) and consists of 4 locations. One deterministic module has affine ranking function (101 + ((long) -2 * x)) and consists of 4 locations. One nondeterministic module has affine ranking function (((long) 2 * y) + 1) and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.6s and 5 iterations. TraceHistogramMax:9. Analysis of lassos took 2.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 5 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 [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45 mSDsluCounter, 76 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 33 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 84 IncrementalHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 43 mSDtfsCounter, 84 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT3 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax166 hnf100 lsp33 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 37ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2024-10-24 23:48:58,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:58,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 23:48:58,761 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE