./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/Flip2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f6fb2bb1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-restricted-15/Flip2.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.graphml --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 cda310f9ec541637625c4cf2e3662e22b6979f61 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.24-f6fb2bb [2019-11-19 19:55:31,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 19:55:31,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 19:55:31,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 19:55:31,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 19:55:31,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 19:55:31,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 19:55:31,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 19:55:31,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 19:55:31,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 19:55:31,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 19:55:31,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 19:55:31,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 19:55:31,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 19:55:31,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 19:55:31,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 19:55:31,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 19:55:31,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 19:55:31,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 19:55:31,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 19:55:31,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 19:55:31,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 19:55:31,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 19:55:31,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 19:55:31,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 19:55:31,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 19:55:31,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 19:55:31,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 19:55:31,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 19:55:31,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 19:55:31,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 19:55:31,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 19:55:31,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 19:55:31,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 19:55:31,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 19:55:31,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 19:55:31,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 19:55:31,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 19:55:31,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 19:55:31,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 19:55:31,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 19:55:31,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-19 19:55:31,515 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 19:55:31,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 19:55:31,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 19:55:31,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 19:55:31,521 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 19:55:31,522 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-19 19:55:31,522 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-19 19:55:31,522 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-19 19:55:31,523 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-19 19:55:31,523 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-19 19:55:31,523 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-19 19:55:31,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 19:55:31,524 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 19:55:31,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 19:55:31,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 19:55:31,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-19 19:55:31,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-19 19:55:31,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-19 19:55:31,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 19:55:31,526 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-19 19:55:31,527 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 19:55:31,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-19 19:55:31,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 19:55:31,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 19:55:31,528 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-19 19:55:31,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 19:55:31,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 19:55:31,529 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-19 19:55:31,530 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-19 19:55:31,531 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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.graphml 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 -> cda310f9ec541637625c4cf2e3662e22b6979f61 [2019-11-19 19:55:31,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 19:55:31,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 19:55:31,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 19:55:31,835 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 19:55:31,836 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 19:55:31,837 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-11-19 19:55:31,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f50f9c82d/db6f2e43abe84b73962dfd8cedb18037/FLAGc58bf91d2 [2019-11-19 19:55:32,378 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 19:55:32,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-11-19 19:55:32,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f50f9c82d/db6f2e43abe84b73962dfd8cedb18037/FLAGc58bf91d2 [2019-11-19 19:55:32,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f50f9c82d/db6f2e43abe84b73962dfd8cedb18037 [2019-11-19 19:55:32,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 19:55:32,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 19:55:32,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 19:55:32,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 19:55:32,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 19:55:32,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:32" (1/1) ... [2019-11-19 19:55:32,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3578fc99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:32, skipping insertion in model container [2019-11-19 19:55:32,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:32" (1/1) ... [2019-11-19 19:55:32,840 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 19:55:32,861 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 19:55:33,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 19:55:33,044 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 19:55:33,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 19:55:33,082 INFO L192 MainTranslator]: Completed translation [2019-11-19 19:55:33,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33 WrapperNode [2019-11-19 19:55:33,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 19:55:33,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 19:55:33,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 19:55:33,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 19:55:33,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... [2019-11-19 19:55:33,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... [2019-11-19 19:55:33,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 19:55:33,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 19:55:33,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 19:55:33,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 19:55:33,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... [2019-11-19 19:55:33,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... [2019-11-19 19:55:33,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... [2019-11-19 19:55:33,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... [2019-11-19 19:55:33,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... [2019-11-19 19:55:33,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... [2019-11-19 19:55:33,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... [2019-11-19 19:55:33,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 19:55:33,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 19:55:33,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 19:55:33,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 19:55:33,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:33,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 19:55:33,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 19:55:33,414 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 19:55:33,415 INFO L285 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-19 19:55:33,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:33 BoogieIcfgContainer [2019-11-19 19:55:33,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 19:55:33,417 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-19 19:55:33,417 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-19 19:55:33,420 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-19 19:55:33,421 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 19:55:33,421 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 07:55:32" (1/3) ... [2019-11-19 19:55:33,422 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5b0a7820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:55:33, skipping insertion in model container [2019-11-19 19:55:33,422 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 19:55:33,422 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:33" (2/3) ... [2019-11-19 19:55:33,423 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5b0a7820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 07:55:33, skipping insertion in model container [2019-11-19 19:55:33,423 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 19:55:33,423 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:33" (3/3) ... [2019-11-19 19:55:33,424 INFO L371 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2019-11-19 19:55:33,518 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-19 19:55:33,519 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-19 19:55:33,519 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-19 19:55:33,519 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 19:55:33,519 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 19:55:33,519 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-19 19:55:33,519 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 19:55:33,520 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-19 19:55:33,541 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-19 19:55:33,573 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 19:55:33,574 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 19:55:33,574 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 19:55:33,584 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-19 19:55:33,585 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 19:55:33,585 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-19 19:55:33,585 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-19 19:55:33,586 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 19:55:33,587 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 19:55:33,587 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 19:55:33,587 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-19 19:55:33,587 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 19:55:33,594 INFO L794 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 6#L19-2true [2019-11-19 19:55:33,594 INFO L796 eck$LassoCheckResult]: Loop: 6#L19-2true assume !!(main_~i~0 > 0 && main_~j~0 > 0); 10#L14true assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 6#L19-2true [2019-11-19 19:55:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-19 19:55:33,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:33,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158205098] [2019-11-19 19:55:33,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:33,703 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:33,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-11-19 19:55:33,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:33,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896525556] [2019-11-19 19:55:33,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:33,727 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-19 19:55:33,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:33,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027797615] [2019-11-19 19:55:33,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:33,745 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:33,865 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:33,865 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:33,866 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:33,866 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:33,867 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 19:55:33,867 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:33,867 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:33,867 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:33,867 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-11-19 19:55:33,868 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:33,868 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:33,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:33,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:33,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:34,030 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:34,031 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:34,048 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:34,048 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,060 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 19:55:34,061 INFO L440 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: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:34,079 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:34,079 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,089 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 19:55:34,090 INFO L440 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: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,110 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:34,110 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,130 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 19:55:34,130 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 19:55:34,425 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 19:55:34,428 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:34,428 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:34,429 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:34,429 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:34,429 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 19:55:34,429 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,429 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:34,429 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:34,429 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-11-19 19:55:34,430 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:34,430 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:34,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:34,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:34,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:34,520 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:34,525 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,533 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:34,536 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:34,537 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:34,537 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:34,537 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:34,546 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 19:55:34,546 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 19:55:34,556 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,567 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:34,569 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:34,569 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:34,569 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:34,569 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:34,576 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 19:55:34,576 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 19:55:34,588 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,605 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:34,607 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:34,607 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 19:55:34,608 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:34,608 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:34,608 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:34,613 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 19:55:34,613 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 19:55:34,620 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 19:55:34,630 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 19:55:34,630 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,650 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 19:55:34,650 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 19:55:34,650 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 19:55:34,651 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2019-11-19 19:55:34,659 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 19:55:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:34,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 19:55:34,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:34,725 WARN L253 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 19:55:34,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:55:34,761 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-19 19:55:34,762 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2019-11-19 19:55:34,824 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 30 states and 43 transitions. Complement of second has 8 states. [2019-11-19 19:55:34,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-19 19:55:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 19:55:34,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2019-11-19 19:55:34,829 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 2 letters. [2019-11-19 19:55:34,829 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:34,830 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-19 19:55:34,830 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:34,830 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 4 letters. [2019-11-19 19:55:34,830 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:34,831 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 43 transitions. [2019-11-19 19:55:34,834 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-19 19:55:34,838 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 19 transitions. [2019-11-19 19:55:34,839 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-11-19 19:55:34,839 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-11-19 19:55:34,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-11-19 19:55:34,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 19:55:34,840 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-11-19 19:55:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-11-19 19:55:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-19 19:55:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-19 19:55:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2019-11-19 19:55:34,863 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-19 19:55:34,863 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-19 19:55:34,864 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-19 19:55:34,864 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2019-11-19 19:55:34,865 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-19 19:55:34,865 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 19:55:34,865 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 19:55:34,865 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-19 19:55:34,866 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 19:55:34,866 INFO L794 eck$LassoCheckResult]: Stem: 75#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 76#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 78#L14 [2019-11-19 19:55:34,866 INFO L796 eck$LassoCheckResult]: Loop: 78#L14 assume !(main_~i~0 < main_~j~0); 84#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 77#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 78#L14 [2019-11-19 19:55:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:34,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-19 19:55:34,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:34,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62384093] [2019-11-19 19:55:34,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:34,877 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2019-11-19 19:55:34,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:34,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663325228] [2019-11-19 19:55:34,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:34,888 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash 29865627, now seen corresponding path program 1 times [2019-11-19 19:55:34,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:34,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936799033] [2019-11-19 19:55:34,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:34,901 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:34,946 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:34,946 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:34,946 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:34,947 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:34,947 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 19:55:34,947 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:34,947 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:34,947 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:34,947 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-11-19 19:55:34,947 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:34,948 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:34,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:34,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:34,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:35,022 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:35,023 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,033 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:35,033 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,038 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 19:55:35,039 INFO L440 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: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:35,060 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 19:55:35,065 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 19:55:35,065 INFO L440 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: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,083 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:35,083 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,106 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 19:55:35,107 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,237 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 19:55:35,241 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:35,241 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:35,241 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:35,241 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:35,241 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 19:55:35,242 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,242 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:35,242 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:35,242 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-11-19 19:55:35,242 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:35,242 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:35,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:35,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:35,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:35,319 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:35,320 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,336 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:35,339 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:35,339 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:35,339 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:35,339 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:35,343 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 19:55:35,343 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 19:55:35,348 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,365 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:35,367 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:35,367 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:35,367 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:35,368 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:35,376 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 19:55:35,379 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,387 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,405 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:35,407 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:35,407 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 19:55:35,407 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:35,408 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:35,408 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:35,410 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 19:55:35,410 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,415 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 19:55:35,422 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-19 19:55:35,422 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,428 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 19:55:35,429 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 19:55:35,429 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 19:55:35,429 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Exception during sending of exit command (exit): Broken pipe Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,441 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 19:55:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:35,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 19:55:35,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:35,486 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 19:55:35,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:55:35,516 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-19 19:55:35,516 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-11-19 19:55:35,556 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 18 transitions. cyclomatic complexity: 9. Second operand 4 states. Result 34 states and 49 transitions. Complement of second has 7 states. [2019-11-19 19:55:35,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-19 19:55:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 19:55:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-11-19 19:55:35,558 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 3 letters. [2019-11-19 19:55:35,559 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:35,559 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-19 19:55:35,559 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:35,559 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-19 19:55:35,559 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:35,560 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 49 transitions. [2019-11-19 19:55:35,562 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-11-19 19:55:35,563 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 30 states and 44 transitions. [2019-11-19 19:55:35,564 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-11-19 19:55:35,564 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-11-19 19:55:35,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 44 transitions. [2019-11-19 19:55:35,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 19:55:35,565 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2019-11-19 19:55:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 44 transitions. [2019-11-19 19:55:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-19 19:55:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-19 19:55:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2019-11-19 19:55:35,570 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-11-19 19:55:35,570 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-11-19 19:55:35,570 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-19 19:55:35,570 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 37 transitions. [2019-11-19 19:55:35,571 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-11-19 19:55:35,572 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 19:55:35,572 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 19:55:35,573 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-19 19:55:35,573 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 19:55:35,573 INFO L794 eck$LassoCheckResult]: Stem: 160#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 161#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 173#L14 assume !(main_~i~0 < main_~j~0); 166#L19 [2019-11-19 19:55:35,573 INFO L796 eck$LassoCheckResult]: Loop: 166#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 167#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 179#L14 assume !(main_~i~0 < main_~j~0); 166#L19 [2019-11-19 19:55:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:35,574 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-19 19:55:35,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:35,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935346923] [2019-11-19 19:55:35,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:35,587 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2019-11-19 19:55:35,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:35,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765968324] [2019-11-19 19:55:35,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:35,606 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:35,607 INFO L82 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2019-11-19 19:55:35,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:35,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998353473] [2019-11-19 19:55:35,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:35,639 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:35,663 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:35,663 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:35,663 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:35,664 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:35,664 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 19:55:35,664 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,664 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:35,664 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:35,664 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-11-19 19:55:35,665 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:35,665 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:35,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:35,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:35,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:35,738 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:35,738 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,748 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:35,748 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,754 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 19:55:35,754 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:35,771 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:35,777 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 19:55:35,777 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,795 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:35,795 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:35,830 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 19:55:35,830 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:36,110 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 19:55:36,114 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:36,114 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:36,114 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:36,115 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:36,115 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 19:55:36,115 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:36,115 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:36,115 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:36,115 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-11-19 19:55:36,115 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:36,116 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:36,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:36,131 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:36,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:36,197 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:36,197 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:36,205 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:36,207 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:36,207 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:36,207 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:36,207 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:36,210 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 19:55:36,210 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:36,216 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:36,234 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:36,246 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:36,246 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 19:55:36,246 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:36,246 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:36,246 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:36,248 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 19:55:36,248 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 19:55:36,251 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 19:55:36,255 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 19:55:36,255 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:36,264 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 19:55:36,264 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 19:55:36,264 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 19:55:36,264 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~i~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:36,275 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 19:55:36,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:36,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 19:55:36,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:36,320 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 19:55:36,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:55:36,342 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-19 19:55:36,342 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 37 transitions. cyclomatic complexity: 19 Second operand 3 states. [2019-11-19 19:55:36,371 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 37 transitions. cyclomatic complexity: 19. Second operand 3 states. Result 62 states and 91 transitions. Complement of second has 5 states. [2019-11-19 19:55:36,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-19 19:55:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 19:55:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-11-19 19:55:36,373 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-11-19 19:55:36,373 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:36,373 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-19 19:55:36,374 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:36,374 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-11-19 19:55:36,374 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:36,374 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 91 transitions. [2019-11-19 19:55:36,378 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-11-19 19:55:36,381 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 55 states and 80 transitions. [2019-11-19 19:55:36,381 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-19 19:55:36,383 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2019-11-19 19:55:36,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 80 transitions. [2019-11-19 19:55:36,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 19:55:36,384 INFO L688 BuchiCegarLoop]: Abstraction has 55 states and 80 transitions. [2019-11-19 19:55:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 80 transitions. [2019-11-19 19:55:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2019-11-19 19:55:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-19 19:55:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2019-11-19 19:55:36,395 INFO L711 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-11-19 19:55:36,395 INFO L591 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-11-19 19:55:36,395 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-19 19:55:36,396 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 60 transitions. [2019-11-19 19:55:36,399 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-11-19 19:55:36,400 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 19:55:36,400 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 19:55:36,400 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-19 19:55:36,400 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 19:55:36,401 INFO L794 eck$LassoCheckResult]: Stem: 285#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 286#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 316#L14 assume !(main_~i~0 < main_~j~0); 291#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 292#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 304#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 299#L19-2 [2019-11-19 19:55:36,401 INFO L796 eck$LassoCheckResult]: Loop: 299#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 309#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 299#L19-2 [2019-11-19 19:55:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:36,401 INFO L82 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2019-11-19 19:55:36,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:36,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874166631] [2019-11-19 19:55:36,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:55:36,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874166631] [2019-11-19 19:55:36,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 19:55:36,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 19:55:36,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609018471] [2019-11-19 19:55:36,463 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 19:55:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:36,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-11-19 19:55:36,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:36,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376891570] [2019-11-19 19:55:36,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:36,475 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:36,545 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:36,545 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:36,545 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:36,545 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:36,546 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 19:55:36,546 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:36,546 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:36,546 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:36,546 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-11-19 19:55:36,546 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:36,547 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:36,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:36,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:36,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:36,630 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:36,631 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:36,640 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:36,641 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:36,657 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 19:55:36,657 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:37,661 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 19:55:37,663 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:37,663 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:37,663 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:37,663 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:37,664 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 19:55:37,664 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:37,664 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:37,664 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:37,664 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-11-19 19:55:37,664 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:37,664 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:37,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:37,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:37,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:37,797 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:37,798 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:37,807 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:37,809 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:37,810 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 19:55:37,810 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:37,810 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:37,810 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:37,812 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 19:55:37,813 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:37,817 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 19:55:37,821 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 19:55:37,821 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:37,826 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 19:55:37,826 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 19:55:37,826 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 19:55:37,826 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~j~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:37,828 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 19:55:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:37,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 19:55:37,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:37,858 WARN L253 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 19:55:37,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:55:37,869 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-19 19:55:37,869 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 60 transitions. cyclomatic complexity: 29 Second operand 3 states. [2019-11-19 19:55:37,900 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 60 transitions. cyclomatic complexity: 29. Second operand 3 states. Result 73 states and 104 transitions. Complement of second has 7 states. [2019-11-19 19:55:37,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-19 19:55:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 19:55:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-19 19:55:37,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-19 19:55:37,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:37,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 2 letters. [2019-11-19 19:55:37,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:37,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-19 19:55:37,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:37,906 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 73 states and 104 transitions. [2019-11-19 19:55:37,910 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2019-11-19 19:55:37,911 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 73 states to 57 states and 83 transitions. [2019-11-19 19:55:37,911 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-19 19:55:37,911 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-11-19 19:55:37,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 83 transitions. [2019-11-19 19:55:37,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 19:55:37,912 INFO L688 BuchiCegarLoop]: Abstraction has 57 states and 83 transitions. [2019-11-19 19:55:37,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 83 transitions. [2019-11-19 19:55:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2019-11-19 19:55:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-19 19:55:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 62 transitions. [2019-11-19 19:55:37,918 INFO L711 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2019-11-19 19:55:37,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 19:55:37,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 19:55:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 19:55:37,922 INFO L87 Difference]: Start difference. First operand 42 states and 62 transitions. Second operand 3 states. [2019-11-19 19:55:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 19:55:37,958 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-11-19 19:55:37,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 19:55:37,959 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 69 transitions. [2019-11-19 19:55:37,963 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-11-19 19:55:37,964 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 46 states and 63 transitions. [2019-11-19 19:55:37,964 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-19 19:55:37,964 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2019-11-19 19:55:37,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 63 transitions. [2019-11-19 19:55:37,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 19:55:37,966 INFO L688 BuchiCegarLoop]: Abstraction has 46 states and 63 transitions. [2019-11-19 19:55:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 63 transitions. [2019-11-19 19:55:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-11-19 19:55:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-19 19:55:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2019-11-19 19:55:37,974 INFO L711 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-19 19:55:37,975 INFO L591 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-19 19:55:37,975 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-19 19:55:37,975 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 61 transitions. [2019-11-19 19:55:37,976 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-11-19 19:55:37,977 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 19:55:37,979 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 19:55:37,979 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-19 19:55:37,979 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 19:55:37,979 INFO L794 eck$LassoCheckResult]: Stem: 539#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 540#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 567#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 568#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 570#L14 assume !(main_~i~0 < main_~j~0); 581#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 541#L19-2 [2019-11-19 19:55:37,979 INFO L796 eck$LassoCheckResult]: Loop: 541#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 542#L14 assume !(main_~i~0 < main_~j~0); 545#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 541#L19-2 [2019-11-19 19:55:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:37,980 INFO L82 PathProgramCache]: Analyzing trace with hash 925765420, now seen corresponding path program 1 times [2019-11-19 19:55:37,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:37,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488889114] [2019-11-19 19:55:37,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:55:38,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488889114] [2019-11-19 19:55:38,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 19:55:38,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 19:55:38,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044833778] [2019-11-19 19:55:38,020 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 19:55:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:38,020 INFO L82 PathProgramCache]: Analyzing trace with hash 39886, now seen corresponding path program 2 times [2019-11-19 19:55:38,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:38,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620885930] [2019-11-19 19:55:38,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:38,032 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:38,061 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:38,061 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:38,061 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:38,062 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:38,062 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 19:55:38,062 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:38,062 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:38,063 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:38,063 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-11-19 19:55:38,063 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:38,063 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:38,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:38,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:38,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:38,124 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:38,124 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:38,138 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 19:55:38,138 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:38,149 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 19:55:38,150 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:38,161 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 19:55:38,163 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 19:55:38,163 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 19:55:38,163 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 19:55:38,163 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 19:55:38,164 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 19:55:38,164 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:38,164 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 19:55:38,164 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 19:55:38,164 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-11-19 19:55:38,164 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 19:55:38,164 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 19:55:38,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:38,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:38,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 19:55:38,224 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 19:55:38,224 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:38,232 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:38,234 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:38,234 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:38,234 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:38,234 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:38,236 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 19:55:38,237 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:38,241 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:38,248 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 19:55:38,249 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 19:55:38,249 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 19:55:38,250 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 19:55:38,250 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 19:55:38,250 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 19:55:38,251 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 19:55:38,251 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:38,254 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 19:55:38,258 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 19:55:38,258 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 19:55:38,263 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 19:55:38,263 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 19:55:38,263 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 19:55:38,263 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 19:55:38,275 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 19:55:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:38,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 19:55:38,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 19:55:38,302 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 19:55:38,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 19:55:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 19:55:38,311 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-19 19:55:38,311 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 61 transitions. cyclomatic complexity: 26 Second operand 3 states. [2019-11-19 19:55:38,334 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 44 states and 61 transitions. cyclomatic complexity: 26. Second operand 3 states. Result 81 states and 106 transitions. Complement of second has 5 states. [2019-11-19 19:55:38,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-19 19:55:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 19:55:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-11-19 19:55:38,337 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-19 19:55:38,338 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:38,338 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 9 letters. Loop has 3 letters. [2019-11-19 19:55:38,338 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:38,338 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 6 letters. [2019-11-19 19:55:38,338 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 19:55:38,338 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81 states and 106 transitions. [2019-11-19 19:55:38,340 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-19 19:55:38,341 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81 states to 60 states and 81 transitions. [2019-11-19 19:55:38,341 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-19 19:55:38,341 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2019-11-19 19:55:38,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 81 transitions. [2019-11-19 19:55:38,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 19:55:38,342 INFO L688 BuchiCegarLoop]: Abstraction has 60 states and 81 transitions. [2019-11-19 19:55:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states and 81 transitions. [2019-11-19 19:55:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2019-11-19 19:55:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-19 19:55:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2019-11-19 19:55:38,346 INFO L711 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2019-11-19 19:55:38,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 19:55:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 19:55:38,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 19:55:38,347 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 3 states. [2019-11-19 19:55:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 19:55:38,359 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-19 19:55:38,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 19:55:38,360 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 67 transitions. [2019-11-19 19:55:38,361 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-19 19:55:38,362 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 49 states and 62 transitions. [2019-11-19 19:55:38,362 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-19 19:55:38,362 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-11-19 19:55:38,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 62 transitions. [2019-11-19 19:55:38,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 19:55:38,362 INFO L688 BuchiCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-11-19 19:55:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states and 62 transitions. [2019-11-19 19:55:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2019-11-19 19:55:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-19 19:55:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-11-19 19:55:38,366 INFO L711 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-19 19:55:38,366 INFO L591 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-19 19:55:38,366 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-19 19:55:38,366 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 48 transitions. [2019-11-19 19:55:38,367 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-19 19:55:38,367 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 19:55:38,367 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 19:55:38,368 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-19 19:55:38,368 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2019-11-19 19:55:38,368 INFO L794 eck$LassoCheckResult]: Stem: 814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 815#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 835#L14 assume !(main_~i~0 < main_~j~0); 823#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 824#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 817#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 828#L19-2 [2019-11-19 19:55:38,368 INFO L796 eck$LassoCheckResult]: Loop: 828#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 826#L14 assume !(main_~i~0 < main_~j~0); 827#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 838#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 841#L14 assume !(main_~i~0 < main_~j~0); 821#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 822#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 840#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 828#L19-2 [2019-11-19 19:55:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash 925834450, now seen corresponding path program 2 times [2019-11-19 19:55:38,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:38,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256195964] [2019-11-19 19:55:38,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:38,381 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -606540634, now seen corresponding path program 1 times [2019-11-19 19:55:38,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:38,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172763044] [2019-11-19 19:55:38,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:38,395 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 19:55:38,396 INFO L82 PathProgramCache]: Analyzing trace with hash -66410377, now seen corresponding path program 1 times [2019-11-19 19:55:38,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 19:55:38,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002205456] [2019-11-19 19:55:38,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 19:55:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 19:55:38,433 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 19:55:38,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 07:55:38 BoogieIcfgContainer [2019-11-19 19:55:38,580 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-19 19:55:38,580 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 19:55:38,580 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 19:55:38,581 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 19:55:38,582 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:33" (3/4) ... [2019-11-19 19:55:38,585 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-19 19:55:38,637 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 19:55:38,637 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 19:55:38,640 INFO L168 Benchmark]: Toolchain (without parser) took 5817.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 219.7 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -132.7 MB). Peak memory consumption was 87.0 MB. Max. memory is 11.5 GB. [2019-11-19 19:55:38,641 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 19:55:38,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.43 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 19:55:38,642 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -201.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 19:55:38,643 INFO L168 Benchmark]: Boogie Preprocessor took 20.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 19:55:38,643 INFO L168 Benchmark]: RCFGBuilder took 214.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2019-11-19 19:55:38,644 INFO L168 Benchmark]: BuchiAutomizer took 5162.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.7 MB). Peak memory consumption was 113.8 MB. Max. memory is 11.5 GB. [2019-11-19 19:55:38,645 INFO L168 Benchmark]: Witness Printer took 57.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 19:55:38,648 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 261.43 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 96.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -201.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 214.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5162.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.7 MB). Peak memory consumption was 113.8 MB. Max. memory is 11.5 GB. * Witness Printer took 57.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (2 trivial, 5 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function j and consists of 5 locations. One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function i + -1 * j and consists of 3 locations. One deterministic module has affine ranking function j and consists of 4 locations. One deterministic module has affine ranking function i and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 37 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.0s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 4.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 44 states and ocurred in iteration 4. Nontrivial modules had stage [5, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 34 SDtfs, 33 SDslu, 6 SDs, 0 SdLazy, 81 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax176 hnf97 lsp55 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf92 smp100 dnf100 smp100 tf109 neg100 sie114 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 29ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {t=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3446b2d4=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@71767355=0, i=2, j=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int j; [L8] int t; [L9] i = __VERIFIER_nondet_int() [L10] j = __VERIFIER_nondet_int() [L11] t = 0 [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t Loop: [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND TRUE i > j [L20] j = i [L13] COND TRUE i > 0 && j > 0 [L14] COND FALSE !(i < j) [L19] COND FALSE !(i > j) [L22] i = i-1 [L13] COND TRUE i > 0 && j > 0 [L14] COND TRUE i < j [L15] t = i [L16] i = j [L17] j = t End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...