./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 678e0110 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 0.1.24-678e011 [2019-11-19 22:20:35,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:20:35,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:20:35,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:20:35,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:20:35,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:20:35,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:20:35,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:20:35,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:20:35,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:20:35,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:20:35,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:20:35,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:20:35,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:20:35,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:20:35,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:20:35,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:20:35,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:20:35,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:20:35,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:20:35,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:20:35,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:20:35,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:20:35,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:20:35,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:20:35,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:20:35,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:20:35,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:20:35,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:20:35,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:20:35,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:20:35,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:20:35,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:20:35,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:20:35,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:20:35,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:20:35,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:20:35,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:20:35,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:20:35,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:20:35,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:20:35,816 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-19 22:20:35,836 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:20:35,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:20:35,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:20:35,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:20:35,843 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:20:35,843 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-19 22:20:35,844 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-19 22:20:35,844 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-19 22:20:35,846 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-19 22:20:35,846 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-19 22:20:35,846 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-19 22:20:35,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:20:35,847 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 22:20:35,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:20:35,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:20:35,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-19 22:20:35,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-19 22:20:35,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-19 22:20:35,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:20:35,850 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-19 22:20:35,850 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:20:35,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-19 22:20:35,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:20:35,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:20:35,852 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-19 22:20:35,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:20:35,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:20:35,853 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-19 22:20:35,855 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-19 22:20:35,855 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 22:20:36,183 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:20:36,201 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:20:36,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:20:36,207 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:20:36,208 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:20:36,209 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-11-19 22:20:36,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191d6889a/d80dbb240c59488d867edf0926bc9696/FLAG2c94c0201 [2019-11-19 22:20:36,729 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:20:36,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/Flip2.c [2019-11-19 22:20:36,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191d6889a/d80dbb240c59488d867edf0926bc9696/FLAG2c94c0201 [2019-11-19 22:20:37,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191d6889a/d80dbb240c59488d867edf0926bc9696 [2019-11-19 22:20:37,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:20:37,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:20:37,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:20:37,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:20:37,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:20:37,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e0893e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37, skipping insertion in model container [2019-11-19 22:20:37,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,117 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:20:37,136 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:20:37,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:20:37,293 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:20:37,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:20:37,326 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:20:37,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37 WrapperNode [2019-11-19 22:20:37,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:20:37,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:20:37,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:20:37,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:20:37,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:20:37,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:20:37,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:20:37,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:20:37,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (1/1) ... [2019-11-19 22:20:37,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:20:37,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:20:37,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:20:37,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:20:37,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (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 22:20:37,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:20:37,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:20:37,667 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:20:37,667 INFO L285 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-19 22:20:37,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:20:37 BoogieIcfgContainer [2019-11-19 22:20:37,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:20:37,670 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-19 22:20:37,670 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-19 22:20:37,674 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-19 22:20:37,675 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:20:37,675 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 10:20:37" (1/3) ... [2019-11-19 22:20:37,676 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@58d149c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 10:20:37, skipping insertion in model container [2019-11-19 22:20:37,676 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:20:37,677 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:37" (2/3) ... [2019-11-19 22:20:37,677 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@58d149c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 10:20:37, skipping insertion in model container [2019-11-19 22:20:37,677 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:20:37,677 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:20:37" (3/3) ... [2019-11-19 22:20:37,679 INFO L371 chiAutomizerObserver]: Analyzing ICFG Flip2.c [2019-11-19 22:20:37,738 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-19 22:20:37,738 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-19 22:20:37,738 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-19 22:20:37,739 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:20:37,739 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:20:37,739 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-19 22:20:37,739 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:20:37,739 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-19 22:20:37,755 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-19 22:20:37,781 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:20:37,781 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:37,781 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:37,794 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-19 22:20:37,794 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 22:20:37,794 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-19 22:20:37,795 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-19 22:20:37,796 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:20:37,796 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:37,796 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:37,797 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-19 22:20:37,797 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 22:20:37,813 INFO L794 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 6#L19-2true [2019-11-19 22:20:37,814 INFO L796 eck$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 22:20:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-19 22:20:37,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:37,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117948641] [2019-11-19 22:20:37,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:37,950 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:37,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:37,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-11-19 22:20:37,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:37,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971205360] [2019-11-19 22:20:37,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:37,974 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:37,976 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-19 22:20:37,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:37,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425632799] [2019-11-19 22:20:37,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:37,993 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:38,101 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:38,102 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:38,102 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:38,102 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:38,102 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:20:38,102 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:38,103 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:38,103 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:38,103 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-11-19 22:20:38,103 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:38,103 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:38,136 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 22:20:38,153 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 22:20:38,161 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 22:20:38,282 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:38,283 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 22:20:38,292 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:38,293 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 22:20:38,306 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:38,306 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 22:20:38,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:38,320 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 22:20:38,326 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:38,326 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) [2019-11-19 22:20:38,339 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:38,339 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:20:38,374 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:20:38,374 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:38,673 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:20:38,676 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:38,676 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:38,676 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:38,676 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:38,677 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:20:38,677 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:38,677 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:38,677 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:38,677 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration1_Loop [2019-11-19 22:20:38,677 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:38,677 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:38,679 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 22:20:38,683 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 22:20:38,686 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 22:20:38,784 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:38,790 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) [2019-11-19 22:20:38,805 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 22:20:38,807 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:38,808 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:38,808 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:38,808 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:38,815 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:38,815 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:38,822 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) [2019-11-19 22:20:38,839 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 22:20:38,841 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:38,841 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:38,841 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:38,841 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:38,846 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:38,846 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:38,852 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) [2019-11-19 22:20:38,868 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 22:20:38,871 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:38,871 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:20:38,872 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:38,872 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:38,872 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:38,875 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:20:38,876 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:38,881 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:20:38,888 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:20:38,888 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) [2019-11-19 22:20:38,904 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:20:38,904 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:20:38,904 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:20:38,905 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:38,911 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:20:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:38,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:20:38,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:38,982 WARN L253 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:20:38,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:39,004 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 22:20:39,023 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 22:20:39,025 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2019-11-19 22:20:39,107 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 22:20:39,108 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 22:20:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 22:20:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2019-11-19 22:20:39,113 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 2 letters. [2019-11-19 22:20:39,114 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:39,114 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-19 22:20:39,115 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:39,115 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 1 letters. Loop has 4 letters. [2019-11-19 22:20:39,115 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:39,116 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 43 transitions. [2019-11-19 22:20:39,120 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-19 22:20:39,125 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 19 transitions. [2019-11-19 22:20:39,127 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-11-19 22:20:39,128 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-11-19 22:20:39,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-11-19 22:20:39,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:39,129 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-11-19 22:20:39,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-11-19 22:20:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-19 22:20:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-19 22:20:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2019-11-19 22:20:39,165 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-19 22:20:39,165 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2019-11-19 22:20:39,165 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-19 22:20:39,166 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2019-11-19 22:20:39,168 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-19 22:20:39,168 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:39,169 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:39,169 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-19 22:20:39,169 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 22:20:39,169 INFO L794 eck$LassoCheckResult]: Stem: 75#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 76#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 78#L14 [2019-11-19 22:20:39,170 INFO L796 eck$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 22:20:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-19 22:20:39,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:39,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285648614] [2019-11-19 22:20:39,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,181 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2019-11-19 22:20:39,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:39,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135399830] [2019-11-19 22:20:39,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,193 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,194 INFO L82 PathProgramCache]: Analyzing trace with hash 29865627, now seen corresponding path program 1 times [2019-11-19 22:20:39,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:39,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067059405] [2019-11-19 22:20:39,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,209 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:39,245 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:39,245 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:39,245 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:39,245 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:39,246 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:20:39,246 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:39,246 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:39,246 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:39,246 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-11-19 22:20:39,246 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:39,247 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:39,248 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 22:20:39,253 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 22:20:39,257 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 22:20:39,341 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:39,341 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 22:20:39,349 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:39,350 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 22:20:39,355 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:39,355 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) [2019-11-19 22:20:39,374 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:39,374 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:39,379 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:39,380 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) [2019-11-19 22:20:39,394 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:39,394 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:20:39,411 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:20:39,411 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 22:20:39,503 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:20:39,505 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:39,506 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:39,506 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:39,506 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:39,506 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:20:39,506 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:39,506 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:39,507 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:39,507 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration2_Loop [2019-11-19 22:20:39,507 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:39,507 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:39,510 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 22:20:39,517 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 22:20:39,526 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 22:20:39,607 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:39,608 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 22:20:39,613 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 22:20:39,617 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:39,618 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:39,618 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:39,618 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:39,625 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:39,625 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:39,633 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:20:39,645 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 22:20:39,647 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:39,647 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:39,647 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:39,647 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:39,654 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:39,655 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 22:20:39,666 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 22:20:39,687 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 22:20:39,689 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:39,689 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:20:39,689 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:39,690 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:39,690 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:39,695 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:20:39,695 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 22:20:39,700 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:20:39,724 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-19 22:20:39,724 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) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:39,738 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:20:39,739 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:20:39,739 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:20:39,739 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-11-19 22:20:39,742 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:20:39,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:39,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:20:39,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:39,789 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:20:39,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:39,811 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 22:20:39,812 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 22:20:39,812 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-11-19 22:20:39,842 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 22:20:39,842 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 22:20:39,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 22:20:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-11-19 22:20:39,844 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 3 letters. [2019-11-19 22:20:39,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:39,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-19 22:20:39,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:39,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-19 22:20:39,846 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:39,846 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 49 transitions. [2019-11-19 22:20:39,848 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-11-19 22:20:39,849 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 30 states and 44 transitions. [2019-11-19 22:20:39,849 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-11-19 22:20:39,849 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-11-19 22:20:39,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 44 transitions. [2019-11-19 22:20:39,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:39,850 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2019-11-19 22:20:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 44 transitions. [2019-11-19 22:20:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-19 22:20:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-19 22:20:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2019-11-19 22:20:39,854 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-11-19 22:20:39,854 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2019-11-19 22:20:39,855 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-19 22:20:39,855 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 37 transitions. [2019-11-19 22:20:39,856 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2019-11-19 22:20:39,856 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:39,856 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:39,857 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-19 22:20:39,857 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 22:20:39,857 INFO L794 eck$LassoCheckResult]: Stem: 160#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 161#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 173#L14 assume !(main_~i~0 < main_~j~0); 166#L19 [2019-11-19 22:20:39,857 INFO L796 eck$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 22:20:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-19 22:20:39,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:39,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274434509] [2019-11-19 22:20:39,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,868 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2019-11-19 22:20:39,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:39,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708212124] [2019-11-19 22:20:39,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,892 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:39,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,893 INFO L82 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2019-11-19 22:20:39,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:39,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007525898] [2019-11-19 22:20:39,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,925 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:39,981 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:39,981 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:39,982 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:39,982 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:39,982 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:20:39,982 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:39,982 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:39,982 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:39,983 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-11-19 22:20:39,983 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:39,983 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:39,985 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 22:20:39,990 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 22:20:39,995 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 22:20:40,054 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:40,054 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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,066 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:40,067 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:20:40,073 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:40,073 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) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,087 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:40,088 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:20:40,094 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:40,094 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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,103 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:40,104 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,122 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:20:40,123 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:20:40,354 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:20:40,356 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:40,357 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:40,357 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:40,357 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:40,357 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:20:40,357 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,357 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:40,357 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:40,357 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration3_Loop [2019-11-19 22:20:40,357 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:40,358 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:40,364 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 22:20:40,372 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 22:20:40,380 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 22:20:40,416 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:40,416 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 22:20:40,430 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 22:20:40,432 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:40,433 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:40,433 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:40,433 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,437 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:40,437 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 22:20:40,445 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) [2019-11-19 22:20:40,471 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 22:20:40,473 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:40,473 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:20:40,474 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:40,474 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:40,474 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:40,477 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:20:40,477 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:20:40,486 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,493 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:20:40,494 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 22:20:40,500 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:20:40,500 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:20:40,501 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:20:40,501 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 [] [2019-11-19 22:20:40,520 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:40,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:20:40,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:40,568 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:20:40,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:40,605 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 22:20:40,605 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 22:20:40,605 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 37 transitions. cyclomatic complexity: 19 Second operand 3 states. [2019-11-19 22:20:40,635 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 22:20:40,636 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 22:20:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 22:20:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-11-19 22:20:40,637 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-11-19 22:20:40,637 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:40,637 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-19 22:20:40,637 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:40,638 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-11-19 22:20:40,638 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:40,638 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 91 transitions. [2019-11-19 22:20:40,641 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-11-19 22:20:40,642 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 55 states and 80 transitions. [2019-11-19 22:20:40,642 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-19 22:20:40,643 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2019-11-19 22:20:40,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 80 transitions. [2019-11-19 22:20:40,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:40,643 INFO L688 BuchiCegarLoop]: Abstraction has 55 states and 80 transitions. [2019-11-19 22:20:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states and 80 transitions. [2019-11-19 22:20:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2019-11-19 22:20:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-19 22:20:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2019-11-19 22:20:40,648 INFO L711 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-11-19 22:20:40,648 INFO L591 BuchiCegarLoop]: Abstraction has 41 states and 60 transitions. [2019-11-19 22:20:40,649 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-19 22:20:40,649 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 60 transitions. [2019-11-19 22:20:40,650 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2019-11-19 22:20:40,650 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:40,650 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:40,651 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-19 22:20:40,651 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-19 22:20:40,651 INFO L794 eck$LassoCheckResult]: Stem: 285#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 286#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 316#L14 assume !(main_~i~0 < main_~j~0); 291#L19 assume main_~i~0 > main_~j~0;main_~j~0 := main_~i~0; 292#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 304#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 299#L19-2 [2019-11-19 22:20:40,651 INFO L796 eck$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 22:20:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2019-11-19 22:20:40,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:40,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950625490] [2019-11-19 22:20:40,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:40,711 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 22:20:40,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950625490] [2019-11-19 22:20:40,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:20:40,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 22:20:40,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133031244] [2019-11-19 22:20:40,721 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:20:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:40,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-11-19 22:20:40,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:40,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041178032] [2019-11-19 22:20:40,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:40,749 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:40,789 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:40,790 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:40,790 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:40,790 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:40,790 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:20:40,790 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,790 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:40,791 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:40,791 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-11-19 22:20:40,791 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:40,791 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:40,793 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 22:20:40,809 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 22:20:40,813 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 22:20:40,898 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:40,898 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) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,906 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:40,906 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 22:20:40,929 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:20:40,930 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 22:20:41,993 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:20:41,995 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:41,996 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:41,996 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:41,996 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:41,996 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:20:41,996 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:41,996 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:41,996 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:41,996 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration4_Loop [2019-11-19 22:20:41,996 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:41,996 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:41,999 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 22:20:42,012 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 22:20:42,015 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 22:20:42,116 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:42,116 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 22:20:42,125 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 22:20:42,126 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:42,127 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:20:42,127 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:42,127 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:42,127 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:42,129 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:20:42,129 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 22:20:42,133 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:20:42,137 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:20:42,137 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 22:20:42,142 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:20:42,142 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:20:42,142 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:20:42,142 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 22:20:42,144 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:42,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:20:42,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:42,182 WARN L253 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:20:42,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:42,199 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 22:20:42,200 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 22:20:42,200 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 60 transitions. cyclomatic complexity: 29 Second operand 3 states. [2019-11-19 22:20:42,223 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 22:20:42,226 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 22:20:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 22:20:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-19 22:20:42,226 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-19 22:20:42,226 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:42,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 2 letters. [2019-11-19 22:20:42,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:42,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-19 22:20:42,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:42,227 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 73 states and 104 transitions. [2019-11-19 22:20:42,229 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 15 [2019-11-19 22:20:42,230 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 73 states to 57 states and 83 transitions. [2019-11-19 22:20:42,230 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-19 22:20:42,231 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-11-19 22:20:42,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 83 transitions. [2019-11-19 22:20:42,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:42,231 INFO L688 BuchiCegarLoop]: Abstraction has 57 states and 83 transitions. [2019-11-19 22:20:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 83 transitions. [2019-11-19 22:20:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2019-11-19 22:20:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-19 22:20:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 62 transitions. [2019-11-19 22:20:42,236 INFO L711 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2019-11-19 22:20:42,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:20:42,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 22:20:42,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:20:42,241 INFO L87 Difference]: Start difference. First operand 42 states and 62 transitions. Second operand 3 states. [2019-11-19 22:20:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:20:42,272 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-11-19 22:20:42,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:20:42,273 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 69 transitions. [2019-11-19 22:20:42,274 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-11-19 22:20:42,275 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 46 states and 63 transitions. [2019-11-19 22:20:42,278 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-19 22:20:42,279 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2019-11-19 22:20:42,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 63 transitions. [2019-11-19 22:20:42,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:42,279 INFO L688 BuchiCegarLoop]: Abstraction has 46 states and 63 transitions. [2019-11-19 22:20:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 63 transitions. [2019-11-19 22:20:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-11-19 22:20:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-19 22:20:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2019-11-19 22:20:42,285 INFO L711 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-19 22:20:42,285 INFO L591 BuchiCegarLoop]: Abstraction has 44 states and 61 transitions. [2019-11-19 22:20:42,285 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-19 22:20:42,285 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 61 transitions. [2019-11-19 22:20:42,288 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 15 [2019-11-19 22:20:42,288 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:42,288 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:42,292 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-19 22:20:42,292 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 22:20:42,292 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 22:20:42,292 INFO L796 eck$LassoCheckResult]: Loop: 541#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 542#L14 assume !(main_~i~0 < main_~j~0); 545#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 541#L19-2 [2019-11-19 22:20:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash 925765420, now seen corresponding path program 1 times [2019-11-19 22:20:42,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:42,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851736886] [2019-11-19 22:20:42,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:20:42,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851736886] [2019-11-19 22:20:42,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:20:42,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 22:20:42,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969780035] [2019-11-19 22:20:42,331 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:20:42,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,331 INFO L82 PathProgramCache]: Analyzing trace with hash 39886, now seen corresponding path program 2 times [2019-11-19 22:20:42,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:42,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538616386] [2019-11-19 22:20:42,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,337 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:42,359 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:42,359 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:42,359 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:42,359 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:42,359 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:20:42,359 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:42,359 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:42,360 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:42,360 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-11-19 22:20:42,360 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:42,360 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:42,362 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 22:20:42,383 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 22:20:42,387 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 22:20:42,441 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:42,441 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 22:20:42,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:42,454 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 22:20:42,470 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:20:42,470 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 22:20:42,481 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:20:42,484 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:42,484 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:42,484 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:42,484 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:42,484 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:20:42,485 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:42,485 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:42,485 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:42,485 INFO L133 ssoRankerPreferences]: Filename of dumped script: Flip2.c_Iteration5_Loop [2019-11-19 22:20:42,485 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:42,485 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:42,487 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 22:20:42,489 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 22:20:42,500 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 22:20:42,541 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:42,544 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 22:20:42,553 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 22:20:42,555 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:42,555 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:42,555 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:42,556 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:42,558 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:42,558 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 22:20:42,564 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 22:20:42,575 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 22:20:42,576 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:42,577 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:20:42,577 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:42,577 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:42,577 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:42,578 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:20:42,578 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 22:20:42,581 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:20:42,586 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:20:42,586 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 22:20:42,591 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:20:42,591 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:20:42,591 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:20:42,591 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-11-19 22:20:42,594 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:42,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:20:42,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:42,636 WARN L253 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:20:42,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:42,646 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 22:20:42,647 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 22:20:42,647 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 61 transitions. cyclomatic complexity: 26 Second operand 3 states. [2019-11-19 22:20:42,670 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 22:20:42,672 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 22:20:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-19 22:20:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-11-19 22:20:42,673 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-19 22:20:42,673 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:42,673 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 9 letters. Loop has 3 letters. [2019-11-19 22:20:42,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:42,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 6 letters. [2019-11-19 22:20:42,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:42,674 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81 states and 106 transitions. [2019-11-19 22:20:42,676 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-19 22:20:42,677 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81 states to 60 states and 81 transitions. [2019-11-19 22:20:42,677 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-19 22:20:42,677 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2019-11-19 22:20:42,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 81 transitions. [2019-11-19 22:20:42,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:42,678 INFO L688 BuchiCegarLoop]: Abstraction has 60 states and 81 transitions. [2019-11-19 22:20:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states and 81 transitions. [2019-11-19 22:20:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2019-11-19 22:20:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-19 22:20:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2019-11-19 22:20:42,682 INFO L711 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2019-11-19 22:20:42,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:20:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 22:20:42,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:20:42,683 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 3 states. [2019-11-19 22:20:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:20:42,698 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-19 22:20:42,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:20:42,700 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 67 transitions. [2019-11-19 22:20:42,700 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-19 22:20:42,702 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 49 states and 62 transitions. [2019-11-19 22:20:42,702 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2019-11-19 22:20:42,703 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-11-19 22:20:42,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 62 transitions. [2019-11-19 22:20:42,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:42,703 INFO L688 BuchiCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-11-19 22:20:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states and 62 transitions. [2019-11-19 22:20:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2019-11-19 22:20:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-19 22:20:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-11-19 22:20:42,712 INFO L711 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-19 22:20:42,712 INFO L591 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-19 22:20:42,713 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-19 22:20:42,713 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 48 transitions. [2019-11-19 22:20:42,713 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-19 22:20:42,715 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:42,716 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:42,716 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-19 22:20:42,716 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 1, 1, 1] [2019-11-19 22:20:42,717 INFO L794 eck$LassoCheckResult]: Stem: 814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~i~0, main_~j~0, main_~t~0;havoc main_~i~0;havoc main_~j~0;havoc main_~t~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~t~0 := 0; 815#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 835#L14 assume !(main_~i~0 < main_~j~0); 823#L19 assume !(main_~i~0 > main_~j~0);main_~i~0 := main_~i~0 - 1; 824#L19-2 assume !!(main_~i~0 > 0 && main_~j~0 > 0); 817#L14 assume main_~i~0 < main_~j~0;main_~t~0 := main_~i~0;main_~i~0 := main_~j~0;main_~j~0 := main_~t~0; 828#L19-2 [2019-11-19 22:20:42,717 INFO L796 eck$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 22:20:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash 925834450, now seen corresponding path program 2 times [2019-11-19 22:20:42,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:42,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508129738] [2019-11-19 22:20:42,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,730 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:42,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,730 INFO L82 PathProgramCache]: Analyzing trace with hash -606540634, now seen corresponding path program 1 times [2019-11-19 22:20:42,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:42,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186614567] [2019-11-19 22:20:42,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,743 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:42,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,744 INFO L82 PathProgramCache]: Analyzing trace with hash -66410377, now seen corresponding path program 1 times [2019-11-19 22:20:42,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:42,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351404218] [2019-11-19 22:20:42,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,765 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:42,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 10:20:42 BoogieIcfgContainer [2019-11-19 22:20:42,933 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-19 22:20:42,934 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:20:42,934 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:20:42,934 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:20:42,935 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:20:37" (3/4) ... [2019-11-19 22:20:42,938 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-19 22:20:42,995 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 22:20:42,996 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:20:42,998 INFO L168 Benchmark]: Toolchain (without parser) took 5899.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 204.5 MB). Free memory was 960.4 MB in the beginning and 1.0 GB in the end (delta: -87.4 MB). Peak memory consumption was 117.1 MB. Max. memory is 11.5 GB. [2019-11-19 22:20:42,999 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:20:43,000 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.15 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:20:43,000 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.93 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:20:43,001 INFO L168 Benchmark]: Boogie Preprocessor took 91.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -176.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 22:20:43,002 INFO L168 Benchmark]: RCFGBuilder took 214.07 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: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2019-11-19 22:20:43,002 INFO L168 Benchmark]: BuchiAutomizer took 5263.17 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 53.5 MB). Peak memory consumption was 127.9 MB. Max. memory is 11.5 GB. [2019-11-19 22:20:43,003 INFO L168 Benchmark]: Witness Printer took 62.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. [2019-11-19 22:20:43,007 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 227.15 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 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 35.93 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 91.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -176.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 214.07 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: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5263.17 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 53.5 MB). Peak memory consumption was 127.9 MB. Max. memory is 11.5 GB. * Witness Printer took 62.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. 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 5.1s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 4.3s. Construction of modules took 0.1s. Büchi inclusion checks took 0.5s. 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: 31ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.9s - 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@4805dab6=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@102bc339=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...