./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer --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 31d0c4253184c01eb9f9573658b07bed7aa94585 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 15:45:54,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:45:54,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:45:54,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:45:54,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:45:54,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:45:54,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:45:54,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:45:54,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:45:54,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:45:54,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:45:54,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:45:54,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:45:54,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:45:54,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:45:54,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:45:54,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:45:54,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:45:54,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:45:54,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:45:54,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:45:54,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:45:54,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:45:54,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:45:54,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:45:54,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:45:54,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:45:54,480 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:45:54,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:45:54,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:45:54,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:45:54,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:45:54,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:45:54,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:45:54,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:45:54,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:45:54,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:45:54,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:45:54,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:45:54,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:45:54,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:45:54,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 15:45:54,495 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:45:54,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:45:54,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 15:45:54,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 15:45:54,496 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 15:45:54,496 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 15:45:54,496 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 15:45:54,497 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 15:45:54,497 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 15:45:54,497 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 15:45:54,497 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 15:45:54,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:45:54,497 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 15:45:54,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:45:54,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:45:54,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 15:45:54,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 15:45:54,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 15:45:54,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 15:45:54,498 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 15:45:54,498 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:45:54,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 15:45:54,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:45:54,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 15:45:54,499 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 15:45:54,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:45:54,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 15:45:54,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:45:54,499 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 15:45:54,500 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 15:45:54,500 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer 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 -> 31d0c4253184c01eb9f9573658b07bed7aa94585 [2019-12-07 15:45:54,598 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:45:54,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:45:54,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:45:54,610 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:45:54,611 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:45:54,611 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2019-12-07 15:45:54,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/data/f281dba73/46e01684373f4eadbd21c7c4524cbb4a/FLAGa79a8881f [2019-12-07 15:45:54,995 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:45:54,995 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2019-12-07 15:45:54,999 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/data/f281dba73/46e01684373f4eadbd21c7c4524cbb4a/FLAGa79a8881f [2019-12-07 15:45:55,426 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/data/f281dba73/46e01684373f4eadbd21c7c4524cbb4a [2019-12-07 15:45:55,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:45:55,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:45:55,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:45:55,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:45:55,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:45:55,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ac9bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55, skipping insertion in model container [2019-12-07 15:45:55,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:45:55,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:45:55,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:45:55,557 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:45:55,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:45:55,610 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:45:55,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55 WrapperNode [2019-12-07 15:45:55,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:45:55,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:45:55,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:45:55,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:45:55,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:45:55,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:45:55,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:45:55,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:45:55,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... [2019-12-07 15:45:55,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:45:55,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:45:55,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:45:55,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:45:55,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/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 [2019-12-07 15:45:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:45:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:45:55,771 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:45:55,771 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 15:45:55,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:45:55 BoogieIcfgContainer [2019-12-07 15:45:55,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:45:55,772 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 15:45:55,773 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 15:45:55,775 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 15:45:55,775 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 15:45:55,775 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 03:45:55" (1/3) ... [2019-12-07 15:45:55,776 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@493ca3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 03:45:55, skipping insertion in model container [2019-12-07 15:45:55,776 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 15:45:55,776 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:45:55" (2/3) ... [2019-12-07 15:45:55,776 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@493ca3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 03:45:55, skipping insertion in model container [2019-12-07 15:45:55,776 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 15:45:55,776 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:45:55" (3/3) ... [2019-12-07 15:45:55,777 INFO L371 chiAutomizerObserver]: Analyzing ICFG Urban-WST2013-Fig2.c [2019-12-07 15:45:55,806 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 15:45:55,806 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 15:45:55,806 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 15:45:55,806 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:45:55,806 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:45:55,806 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 15:45:55,806 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:45:55,806 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 15:45:55,815 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-12-07 15:45:55,827 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 15:45:55,827 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:55,827 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:55,831 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:55,831 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 15:45:55,831 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 15:45:55,832 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-12-07 15:45:55,832 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 15:45:55,832 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:55,832 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:55,832 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:55,832 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 15:45:55,837 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L19-2true [2019-12-07 15:45:55,837 INFO L796 eck$LassoCheckResult]: Loop: 6#L19-2true assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 9#L21-2true assume !(main_~x2~0 > 1); 8#L21-3true main_~x1~0 := 1 + main_~x1~0; 6#L19-2true [2019-12-07 15:45:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:55,841 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-12-07 15:45:55,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:55,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565448573] [2019-12-07 15:45:55,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:55,909 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2019-12-07 15:45:55,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:55,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036221208] [2019-12-07 15:45:55,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:55,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036221208] [2019-12-07 15:45:55,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:45:55,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:45:55,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294198932] [2019-12-07 15:45:55,949 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 15:45:55,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:45:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:45:55,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:45:55,962 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-12-07 15:45:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:45:55,973 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-12-07 15:45:55,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:45:55,975 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2019-12-07 15:45:55,976 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 15:45:55,978 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2019-12-07 15:45:55,979 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-12-07 15:45:55,979 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-12-07 15:45:55,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2019-12-07 15:45:55,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:55,980 INFO L688 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2019-12-07 15:45:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2019-12-07 15:45:55,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-12-07 15:45:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 15:45:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2019-12-07 15:45:55,997 INFO L711 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2019-12-07 15:45:55,997 INFO L591 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2019-12-07 15:45:55,997 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 15:45:55,997 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2019-12-07 15:45:55,997 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-12-07 15:45:55,997 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:55,998 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:55,998 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:55,998 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-12-07 15:45:55,998 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 27#L19-2 [2019-12-07 15:45:55,998 INFO L796 eck$LassoCheckResult]: Loop: 27#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 28#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 30#L21-2 assume !(main_~x2~0 > 1); 29#L21-3 main_~x1~0 := 1 + main_~x1~0; 27#L19-2 [2019-12-07 15:45:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2019-12-07 15:45:55,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:55,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725370489] [2019-12-07 15:45:55,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,003 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2019-12-07 15:45:56,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234332664] [2019-12-07 15:45:56,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234332664] [2019-12-07 15:45:56,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380953464] [2019-12-07 15:45:56,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:45:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 15:45:56,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:45:56,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-12-07 15:45:56,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417133391] [2019-12-07 15:45:56,065 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 15:45:56,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:45:56,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:45:56,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:45:56,066 INFO L87 Difference]: Start difference. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand 4 states. [2019-12-07 15:45:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:45:56,078 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2019-12-07 15:45:56,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:45:56,079 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6 states and 7 transitions. [2019-12-07 15:45:56,080 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 15:45:56,080 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6 states to 6 states and 7 transitions. [2019-12-07 15:45:56,080 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 15:45:56,080 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 15:45:56,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 7 transitions. [2019-12-07 15:45:56,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:56,080 INFO L688 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-12-07 15:45:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 7 transitions. [2019-12-07 15:45:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-12-07 15:45:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-12-07 15:45:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2019-12-07 15:45:56,081 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-12-07 15:45:56,081 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-12-07 15:45:56,081 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 15:45:56,082 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2019-12-07 15:45:56,082 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 15:45:56,082 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:56,082 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:56,082 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:56,082 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2019-12-07 15:45:56,082 INFO L794 eck$LassoCheckResult]: Stem: 53#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 54#L19-2 [2019-12-07 15:45:56,082 INFO L796 eck$LassoCheckResult]: Loop: 54#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 55#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 57#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 58#L21-2 assume !(main_~x2~0 > 1); 56#L21-3 main_~x1~0 := 1 + main_~x1~0; 54#L19-2 [2019-12-07 15:45:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2019-12-07 15:45:56,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387435558] [2019-12-07 15:45:56,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,087 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,088 INFO L82 PathProgramCache]: Analyzing trace with hash 38449199, now seen corresponding path program 2 times [2019-12-07 15:45:56,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411471537] [2019-12-07 15:45:56,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411471537] [2019-12-07 15:45:56,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673273268] [2019-12-07 15:45:56,111 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:45:56,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:45:56,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:45:56,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:45:56,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:45:56,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-12-07 15:45:56,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883236761] [2019-12-07 15:45:56,133 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 15:45:56,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:45:56,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:45:56,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:45:56,133 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand 5 states. [2019-12-07 15:45:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:45:56,142 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2019-12-07 15:45:56,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:45:56,143 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 8 transitions. [2019-12-07 15:45:56,143 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-12-07 15:45:56,143 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 8 transitions. [2019-12-07 15:45:56,143 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-12-07 15:45:56,143 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-12-07 15:45:56,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2019-12-07 15:45:56,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:56,144 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-12-07 15:45:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2019-12-07 15:45:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-12-07 15:45:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 15:45:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-12-07 15:45:56,145 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-12-07 15:45:56,145 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-12-07 15:45:56,145 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 15:45:56,145 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2019-12-07 15:45:56,145 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-12-07 15:45:56,145 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:56,145 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:56,145 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:56,146 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 1, 1, 1] [2019-12-07 15:45:56,146 INFO L794 eck$LassoCheckResult]: Stem: 86#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 87#L19-2 [2019-12-07 15:45:56,146 INFO L796 eck$LassoCheckResult]: Loop: 87#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 88#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 90#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 92#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 91#L21-2 assume !(main_~x2~0 > 1); 89#L21-3 main_~x1~0 := 1 + main_~x1~0; 87#L19-2 [2019-12-07 15:45:56,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,146 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2019-12-07 15:45:56,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436197485] [2019-12-07 15:45:56,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,150 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1191926928, now seen corresponding path program 3 times [2019-12-07 15:45:56,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476264246] [2019-12-07 15:45:56,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476264246] [2019-12-07 15:45:56,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349658463] [2019-12-07 15:45:56,177 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:45:56,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 15:45:56,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:45:56,197 INFO L264 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 15:45:56,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:45:56,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-12-07 15:45:56,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600622296] [2019-12-07 15:45:56,202 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 15:45:56,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:45:56,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 15:45:56,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 15:45:56,202 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 6 states. [2019-12-07 15:45:56,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:45:56,213 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2019-12-07 15:45:56,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 15:45:56,213 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2019-12-07 15:45:56,214 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-12-07 15:45:56,214 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 8 states and 9 transitions. [2019-12-07 15:45:56,214 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-12-07 15:45:56,214 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-12-07 15:45:56,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2019-12-07 15:45:56,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:56,215 INFO L688 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-12-07 15:45:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2019-12-07 15:45:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-12-07 15:45:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 15:45:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-12-07 15:45:56,216 INFO L711 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-12-07 15:45:56,216 INFO L591 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-12-07 15:45:56,216 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-12-07 15:45:56,216 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2019-12-07 15:45:56,216 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-12-07 15:45:56,216 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:56,216 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:56,216 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:56,216 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 1, 1, 1] [2019-12-07 15:45:56,216 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 126#L19-2 [2019-12-07 15:45:56,217 INFO L796 eck$LassoCheckResult]: Loop: 126#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 127#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 129#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 132#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 131#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 130#L21-2 assume !(main_~x2~0 > 1); 128#L21-3 main_~x1~0 := 1 + main_~x1~0; 126#L19-2 [2019-12-07 15:45:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,217 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 5 times [2019-12-07 15:45:56,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420547411] [2019-12-07 15:45:56,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,221 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1704969137, now seen corresponding path program 4 times [2019-12-07 15:45:56,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694921259] [2019-12-07 15:45:56,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694921259] [2019-12-07 15:45:56,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042157047] [2019-12-07 15:45:56,255 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:45:56,274 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:45:56,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:45:56,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 15:45:56,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:45:56,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-12-07 15:45:56,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255158977] [2019-12-07 15:45:56,281 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 15:45:56,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:45:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 15:45:56,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-07 15:45:56,282 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 7 states. [2019-12-07 15:45:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:45:56,295 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-12-07 15:45:56,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 15:45:56,295 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2019-12-07 15:45:56,295 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-12-07 15:45:56,296 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2019-12-07 15:45:56,296 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2019-12-07 15:45:56,296 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-12-07 15:45:56,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2019-12-07 15:45:56,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:56,296 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-12-07 15:45:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2019-12-07 15:45:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 15:45:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 15:45:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-12-07 15:45:56,297 INFO L711 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-12-07 15:45:56,297 INFO L591 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-12-07 15:45:56,297 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-12-07 15:45:56,297 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2019-12-07 15:45:56,298 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-12-07 15:45:56,298 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:56,298 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:56,298 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:56,298 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [5, 1, 1, 1] [2019-12-07 15:45:56,298 INFO L794 eck$LassoCheckResult]: Stem: 170#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 171#L19-2 [2019-12-07 15:45:56,298 INFO L796 eck$LassoCheckResult]: Loop: 171#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 172#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 174#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 178#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 177#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 176#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 175#L21-2 assume !(main_~x2~0 > 1); 173#L21-3 main_~x1~0 := 1 + main_~x1~0; 171#L19-2 [2019-12-07 15:45:56,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,298 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 6 times [2019-12-07 15:45:56,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272603850] [2019-12-07 15:45:56,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,302 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1314433936, now seen corresponding path program 5 times [2019-12-07 15:45:56,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854575692] [2019-12-07 15:45:56,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854575692] [2019-12-07 15:45:56,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847259608] [2019-12-07 15:45:56,340 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:45:56,362 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 15:45:56,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:45:56,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 15:45:56,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:45:56,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-12-07 15:45:56,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627317785] [2019-12-07 15:45:56,368 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 15:45:56,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:45:56,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 15:45:56,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 15:45:56,368 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 8 states. [2019-12-07 15:45:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:45:56,382 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-12-07 15:45:56,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 15:45:56,382 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2019-12-07 15:45:56,383 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-12-07 15:45:56,383 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2019-12-07 15:45:56,383 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2019-12-07 15:45:56,383 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-12-07 15:45:56,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2019-12-07 15:45:56,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:56,384 INFO L688 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-12-07 15:45:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2019-12-07 15:45:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 15:45:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 15:45:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-12-07 15:45:56,385 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-12-07 15:45:56,385 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-12-07 15:45:56,385 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-12-07 15:45:56,385 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2019-12-07 15:45:56,385 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-12-07 15:45:56,385 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:56,385 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:56,386 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:56,386 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 1, 1, 1] [2019-12-07 15:45:56,386 INFO L794 eck$LassoCheckResult]: Stem: 221#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 222#L19-2 [2019-12-07 15:45:56,386 INFO L796 eck$LassoCheckResult]: Loop: 222#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 223#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 225#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 230#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 229#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 228#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 227#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 226#L21-2 assume !(main_~x2~0 > 1); 224#L21-3 main_~x1~0 := 1 + main_~x1~0; 222#L19-2 [2019-12-07 15:45:56,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,386 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 7 times [2019-12-07 15:45:56,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185539239] [2019-12-07 15:45:56,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,390 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2092744593, now seen corresponding path program 6 times [2019-12-07 15:45:56,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827747347] [2019-12-07 15:45:56,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827747347] [2019-12-07 15:45:56,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794225047] [2019-12-07 15:45:56,434 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:45:56,451 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-07 15:45:56,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:45:56,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 15:45:56,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:45:56,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-12-07 15:45:56,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308777372] [2019-12-07 15:45:56,457 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 15:45:56,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:45:56,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 15:45:56,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-07 15:45:56,457 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 9 states. [2019-12-07 15:45:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:45:56,468 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2019-12-07 15:45:56,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 15:45:56,468 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2019-12-07 15:45:56,469 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2019-12-07 15:45:56,469 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 15:45:56,469 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-12-07 15:45:56,469 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2019-12-07 15:45:56,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2019-12-07 15:45:56,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:56,469 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 15:45:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2019-12-07 15:45:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 15:45:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 15:45:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 15:45:56,470 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 15:45:56,471 INFO L591 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 15:45:56,471 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-12-07 15:45:56,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2019-12-07 15:45:56,471 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2019-12-07 15:45:56,471 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:56,471 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:56,471 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:56,471 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [7, 1, 1, 1] [2019-12-07 15:45:56,471 INFO L794 eck$LassoCheckResult]: Stem: 278#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 279#L19-2 [2019-12-07 15:45:56,472 INFO L796 eck$LassoCheckResult]: Loop: 279#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 280#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 282#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 288#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 287#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 286#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 285#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 284#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 283#L21-2 assume !(main_~x2~0 > 1); 281#L21-3 main_~x1~0 := 1 + main_~x1~0; 279#L19-2 [2019-12-07 15:45:56,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 8 times [2019-12-07 15:45:56,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986849194] [2019-12-07 15:45:56,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,475 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,475 INFO L82 PathProgramCache]: Analyzing trace with hash -450571184, now seen corresponding path program 7 times [2019-12-07 15:45:56,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434030387] [2019-12-07 15:45:56,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434030387] [2019-12-07 15:45:56,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683039880] [2019-12-07 15:45:56,520 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:45:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 15:45:56,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:45:56,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-12-07 15:45:56,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952109294] [2019-12-07 15:45:56,542 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 15:45:56,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:45:56,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 15:45:56,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 15:45:56,542 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand 10 states. [2019-12-07 15:45:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:45:56,558 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-12-07 15:45:56,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 15:45:56,558 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2019-12-07 15:45:56,558 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2019-12-07 15:45:56,559 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2019-12-07 15:45:56,559 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-12-07 15:45:56,559 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2019-12-07 15:45:56,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2019-12-07 15:45:56,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:56,559 INFO L688 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 15:45:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2019-12-07 15:45:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 15:45:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 15:45:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-12-07 15:45:56,560 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 15:45:56,560 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 15:45:56,560 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-12-07 15:45:56,560 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2019-12-07 15:45:56,561 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2019-12-07 15:45:56,561 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:56,561 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:56,561 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:56,561 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [8, 1, 1, 1] [2019-12-07 15:45:56,561 INFO L794 eck$LassoCheckResult]: Stem: 341#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 342#L19-2 [2019-12-07 15:45:56,561 INFO L796 eck$LassoCheckResult]: Loop: 342#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 343#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 345#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 352#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 351#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 350#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 349#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 348#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 347#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 346#L21-2 assume !(main_~x2~0 > 1); 344#L21-3 main_~x1~0 := 1 + main_~x1~0; 342#L19-2 [2019-12-07 15:45:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 9 times [2019-12-07 15:45:56,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234328369] [2019-12-07 15:45:56,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,564 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1082803057, now seen corresponding path program 8 times [2019-12-07 15:45:56,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345974248] [2019-12-07 15:45:56,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345974248] [2019-12-07 15:45:56,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269839845] [2019-12-07 15:45:56,620 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:45:56,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:45:56,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:45:56,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 15:45:56,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:56,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:45:56,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-12-07 15:45:56,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141634582] [2019-12-07 15:45:56,644 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 15:45:56,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:45:56,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 15:45:56,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-07 15:45:56,645 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 11 states. [2019-12-07 15:45:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:45:56,662 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-12-07 15:45:56,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 15:45:56,662 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2019-12-07 15:45:56,663 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2019-12-07 15:45:56,663 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2019-12-07 15:45:56,663 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-12-07 15:45:56,663 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2019-12-07 15:45:56,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2019-12-07 15:45:56,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:56,664 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 15:45:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2019-12-07 15:45:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 15:45:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 15:45:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-12-07 15:45:56,665 INFO L711 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 15:45:56,665 INFO L591 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 15:45:56,665 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-12-07 15:45:56,665 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2019-12-07 15:45:56,665 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2019-12-07 15:45:56,665 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:56,665 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:56,666 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 15:45:56,666 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [9, 1, 1, 1] [2019-12-07 15:45:56,666 INFO L794 eck$LassoCheckResult]: Stem: 410#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 411#L19-2 [2019-12-07 15:45:56,666 INFO L796 eck$LassoCheckResult]: Loop: 411#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 412#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 414#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 422#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 421#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 420#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 419#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 418#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 417#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 416#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 415#L21-2 assume !(main_~x2~0 > 1); 413#L21-3 main_~x1~0 := 1 + main_~x1~0; 411#L19-2 [2019-12-07 15:45:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,666 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 10 times [2019-12-07 15:45:56,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329452941] [2019-12-07 15:45:56,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,669 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,670 INFO L82 PathProgramCache]: Analyzing trace with hash 792845360, now seen corresponding path program 9 times [2019-12-07 15:45:56,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212933726] [2019-12-07 15:45:56,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,680 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash 287286735, now seen corresponding path program 1 times [2019-12-07 15:45:56,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:56,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793123652] [2019-12-07 15:45:56,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:56,691 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:56,766 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 15:45:56,766 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 15:45:56,766 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 15:45:56,766 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 15:45:56,767 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 15:45:56,767 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:56,767 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 15:45:56,767 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 15:45:56,767 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2019-12-07 15:45:56,767 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 15:45:56,767 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 15:45:56,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:56,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:56,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:56,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:56,828 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 15:45:56,828 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 10 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:56,832 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 15:45:56,832 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 15:45:56,839 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 15:45:56,839 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 /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:56,845 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 15:45:56,845 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 15:45:56,848 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 15:45:56,849 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 /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:56,859 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 15:45:56,859 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 13 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:56,867 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 15:45:56,867 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 15:45:56,873 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 15:45:56,874 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 15:45:56,875 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 15:45:56,875 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 15:45:56,875 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 15:45:56,875 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 15:45:56,875 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:56,875 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 15:45:56,875 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 15:45:56,875 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2019-12-07 15:45:56,875 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 15:45:56,876 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 15:45:56,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:56,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:56,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:56,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:56,918 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 15:45:56,921 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 14 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:56,925 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 [2019-12-07 15:45:56,927 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 15:45:56,927 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 15:45:56,927 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 15:45:56,927 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 15:45:56,931 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 15:45:56,931 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 15:45:56,935 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 15 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:56,940 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 [2019-12-07 15:45:56,941 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 15:45:56,941 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 15:45:56,941 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 15:45:56,942 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 15:45:56,944 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 15:45:56,944 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 15:45:56,947 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 16 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:56,952 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 [2019-12-07 15:45:56,953 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 15:45:56,953 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 15:45:56,954 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 15:45:56,954 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 15:45:56,954 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 15:45:56,955 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 15:45:56,955 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 15:45:56,957 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 15:45:56,962 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 15:45:56,962 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/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 [2019-12-07 15:45:56,972 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 15:45:56,972 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 15:45:56,973 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 15:45:56,974 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x1~0) = -2*ULTIMATE.start_main_~x1~0 + 21 Supporting invariants [] [2019-12-07 15:45:56,979 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 15:45:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:56,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 15:45:56,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:57,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:45:57,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-07 15:45:57,015 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 [2019-12-07 15:45:57,015 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 3 states. [2019-12-07 15:45:57,034 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 25 states and 28 transitions. Complement of second has 4 states. [2019-12-07 15:45:57,034 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 [2019-12-07 15:45:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 15:45:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 15:45:57,036 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 12 letters. [2019-12-07 15:45:57,036 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,036 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 13 letters. Loop has 12 letters. [2019-12-07 15:45:57,037 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 24 letters. [2019-12-07 15:45:57,037 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,037 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 28 transitions. [2019-12-07 15:45:57,038 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 15:45:57,038 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 27 transitions. [2019-12-07 15:45:57,038 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-12-07 15:45:57,038 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2019-12-07 15:45:57,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 27 transitions. [2019-12-07 15:45:57,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 15:45:57,038 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-12-07 15:45:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 27 transitions. [2019-12-07 15:45:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2019-12-07 15:45:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 15:45:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-12-07 15:45:57,040 INFO L711 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-12-07 15:45:57,040 INFO L591 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-12-07 15:45:57,040 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-12-07 15:45:57,040 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2019-12-07 15:45:57,040 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 15:45:57,040 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:57,040 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:57,041 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 15:45:57,041 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-12-07 15:45:57,041 INFO L794 eck$LassoCheckResult]: Stem: 507#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 508#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 510#L21-2 [2019-12-07 15:45:57,041 INFO L796 eck$LassoCheckResult]: Loop: 510#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 510#L21-2 [2019-12-07 15:45:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-12-07 15:45:57,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:57,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966748491] [2019-12-07 15:45:57,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,044 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2019-12-07 15:45:57,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:57,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583184053] [2019-12-07 15:45:57,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,047 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,048 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2019-12-07 15:45:57,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:57,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081304237] [2019-12-07 15:45:57,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,052 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:57,058 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 15:45:57,058 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 15:45:57,058 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 15:45:57,059 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 15:45:57,059 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 15:45:57,059 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,059 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 15:45:57,059 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 15:45:57,059 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2019-12-07 15:45:57,059 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 15:45:57,059 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 15:45:57,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,063 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,086 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 15:45:57,086 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/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 [2019-12-07 15:45:57,090 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 15:45:57,090 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 15:45:57,094 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 15:45:57,094 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 /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/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 [2019-12-07 15:45:57,099 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 15:45:57,099 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 15:45:57,103 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 15:45:57,103 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 /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/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 [2019-12-07 15:45:57,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 15:45:57,108 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/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 [2019-12-07 15:45:57,115 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 15:45:57,115 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 15:45:57,121 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 15:45:57,123 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 15:45:57,123 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 15:45:57,123 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 15:45:57,123 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 15:45:57,123 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 15:45:57,123 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,123 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 15:45:57,123 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 15:45:57,123 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2019-12-07 15:45:57,123 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 15:45:57,124 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 15:45:57,124 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,126 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,128 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,153 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 15:45:57,153 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 22 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,156 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 [2019-12-07 15:45:57,157 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 15:45:57,157 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 15:45:57,157 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 15:45:57,158 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 15:45:57,160 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 15:45:57,160 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 15:45:57,163 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,168 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 [2019-12-07 15:45:57,169 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 15:45:57,169 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 15:45:57,169 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 15:45:57,169 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 15:45:57,171 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 15:45:57,171 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 15:45:57,173 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 24 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,182 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 [2019-12-07 15:45:57,184 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 15:45:57,184 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 15:45:57,184 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 15:45:57,184 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 15:45:57,184 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 15:45:57,185 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 15:45:57,185 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 15:45:57,187 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 15:45:57,190 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 15:45:57,190 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/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 [2019-12-07 15:45:57,195 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 15:45:57,195 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 15:45:57,195 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 15:45:57,195 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] [2019-12-07 15:45:57,197 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 15:45:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:57,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 15:45:57,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:57,216 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:45:57,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:57,216 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-12-07 15:45:57,216 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 2 states. [2019-12-07 15:45:57,221 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 31 states and 36 transitions. Complement of second has 5 states. [2019-12-07 15:45:57,222 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 [2019-12-07 15:45:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 15:45:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 15:45:57,222 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2019-12-07 15:45:57,222 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,222 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2019-12-07 15:45:57,222 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,222 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2019-12-07 15:45:57,222 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,223 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 36 transitions. [2019-12-07 15:45:57,223 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 15:45:57,223 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 27 states and 31 transitions. [2019-12-07 15:45:57,224 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2019-12-07 15:45:57,224 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2019-12-07 15:45:57,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 31 transitions. [2019-12-07 15:45:57,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 15:45:57,224 INFO L688 BuchiCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-12-07 15:45:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 31 transitions. [2019-12-07 15:45:57,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2019-12-07 15:45:57,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 15:45:57,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-12-07 15:45:57,225 INFO L711 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-12-07 15:45:57,225 INFO L591 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-12-07 15:45:57,225 INFO L424 BuchiCegarLoop]: ======== Iteration 12============ [2019-12-07 15:45:57,225 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2019-12-07 15:45:57,226 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 15:45:57,226 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 15:45:57,226 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 15:45:57,226 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 2, 1, 1, 1] [2019-12-07 15:45:57,226 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-12-07 15:45:57,226 INFO L794 eck$LassoCheckResult]: Stem: 582#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 583#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 584#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 588#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 596#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 595#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 594#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 593#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 592#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 591#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 590#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 589#L21-2 assume !(main_~x2~0 > 1); 587#L21-3 main_~x1~0 := 1 + main_~x1~0; 585#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 586#L21-2 [2019-12-07 15:45:57,226 INFO L796 eck$LassoCheckResult]: Loop: 586#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 586#L21-2 [2019-12-07 15:45:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,226 INFO L82 PathProgramCache]: Analyzing trace with hash 315954203, now seen corresponding path program 2 times [2019-12-07 15:45:57,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:57,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209934645] [2019-12-07 15:45:57,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,236 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,237 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2019-12-07 15:45:57,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:57,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312844682] [2019-12-07 15:45:57,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,239 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1204645720, now seen corresponding path program 3 times [2019-12-07 15:45:57,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:45:57,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749847833] [2019-12-07 15:45:57,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:45:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:45:57,249 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:45:57,256 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 15:45:57,256 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 15:45:57,256 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 15:45:57,256 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 15:45:57,257 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 15:45:57,257 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,257 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 15:45:57,257 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 15:45:57,257 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2019-12-07 15:45:57,257 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 15:45:57,257 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 15:45:57,257 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,259 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,285 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 15:45:57,285 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,288 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 15:45:57,288 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 15:45:57,291 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 15:45:57,292 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 /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,296 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 15:45:57,296 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 28 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,302 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 15:45:57,303 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 15:45:57,307 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 15:45:57,309 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 15:45:57,309 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 15:45:57,309 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 15:45:57,309 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 15:45:57,309 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 15:45:57,309 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,309 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 15:45:57,309 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 15:45:57,309 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2019-12-07 15:45:57,309 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 15:45:57,310 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 15:45:57,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,312 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 15:45:57,336 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 15:45:57,337 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 29 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,340 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 [2019-12-07 15:45:57,341 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 15:45:57,341 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 15:45:57,341 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 15:45:57,341 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 15:45:57,342 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 15:45:57,342 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 15:45:57,345 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,350 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 [2019-12-07 15:45:57,352 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 15:45:57,352 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 15:45:57,352 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 15:45:57,352 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 15:45:57,352 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 15:45:57,353 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 15:45:57,353 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 15:45:57,355 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 15:45:57,357 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 15:45:57,357 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e0242221-b6a7-430c-956f-92a59ee0312a/bin/uautomizer/z3 Starting monitored process 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 15:45:57,362 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 15:45:57,362 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 15:45:57,363 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 15:45:57,363 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] [2019-12-07 15:45:57,365 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 15:45:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:57,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 15:45:57,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:57,380 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:45:57,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:57,381 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-12-07 15:45:57,381 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-12-07 15:45:57,387 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2019-12-07 15:45:57,387 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 [2019-12-07 15:45:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 15:45:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 15:45:57,387 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2019-12-07 15:45:57,388 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,388 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 15:45:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:57,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 15:45:57,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:57,409 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:45:57,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:57,409 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2019-12-07 15:45:57,409 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-12-07 15:45:57,414 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2019-12-07 15:45:57,414 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 [2019-12-07 15:45:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 15:45:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 15:45:57,415 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2019-12-07 15:45:57,415 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,415 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 15:45:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:45:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:57,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 15:45:57,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:45:57,432 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 15:45:57,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:45:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:45:57,433 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-12-07 15:45:57,433 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-12-07 15:45:57,439 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 18 states and 20 transitions. Complement of second has 4 states. [2019-12-07 15:45:57,440 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 [2019-12-07 15:45:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 15:45:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-12-07 15:45:57,440 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 1 letters. [2019-12-07 15:45:57,441 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,441 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 15 letters. Loop has 1 letters. [2019-12-07 15:45:57,441 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,441 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 2 letters. [2019-12-07 15:45:57,441 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 15:45:57,442 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2019-12-07 15:45:57,442 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 15:45:57,442 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2019-12-07 15:45:57,442 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 15:45:57,442 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 15:45:57,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 15:45:57,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 15:45:57,442 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 15:45:57,442 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 15:45:57,442 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 15:45:57,443 INFO L424 BuchiCegarLoop]: ======== Iteration 13============ [2019-12-07 15:45:57,443 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-12-07 15:45:57,443 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 15:45:57,443 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-12-07 15:45:57,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 03:45:57 BoogieIcfgContainer [2019-12-07 15:45:57,447 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 15:45:57,447 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 15:45:57,447 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 15:45:57,447 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 15:45:57,448 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:45:55" (3/4) ... [2019-12-07 15:45:57,450 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 15:45:57,450 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 15:45:57,451 INFO L168 Benchmark]: Toolchain (without parser) took 2021.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 939.4 MB in the beginning and 1.0 GB in the end (delta: -74.8 MB). Peak memory consumption was 58.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:45:57,451 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:45:57,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -191.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-12-07 15:45:57,452 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:45:57,452 INFO L168 Benchmark]: Boogie Preprocessor took 12.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:45:57,452 INFO L168 Benchmark]: RCFGBuilder took 125.77 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: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-12-07 15:45:57,453 INFO L168 Benchmark]: BuchiAutomizer took 1674.43 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: 96.3 MB). Peak memory consumption was 96.3 MB. Max. memory is 11.5 GB. [2019-12-07 15:45:57,453 INFO L168 Benchmark]: Witness Printer took 2.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:45:57,454 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 180.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -191.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 125.77 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: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1674.43 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: 96.3 MB). Peak memory consumption was 96.3 MB. Max. memory is 11.5 GB. * Witness Printer took 2.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (9 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -2 * x1 + 21 and consists of 3 locations. One deterministic module has affine ranking function x2 and consists of 3 locations. One nondeterministic module has affine ranking function x2 and consists of 3 locations. 9 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.6s and 13 iterations. TraceHistogramMax:9. Analysis of lassos took 1.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 10. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 10. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 45/45 HoareTripleCheckerStatistics: 62 SDtfs, 21 SDslu, 50 SDs, 0 SdLazy, 157 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI9 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax203 hnf98 lsp42 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 12ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...