./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.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_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/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 76e89a58b9c6f7059fcf416ee7a1666558a3d440 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:56:47,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:56:47,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:56:47,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:56:47,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:56:47,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:56:47,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:56:47,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:56:47,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:56:47,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:56:47,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:56:47,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:56:47,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:56:47,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:56:47,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:56:47,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:56:47,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:56:47,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:56:47,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:56:47,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:56:47,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:56:47,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:56:47,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:56:47,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:56:47,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:56:47,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:56:47,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:56:47,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:56:47,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:56:47,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:56:47,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:56:47,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:56:47,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:56:47,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:56:47,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:56:47,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:56:47,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:56:47,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:56:47,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:56:47,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:56:47,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:56:47,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 18:56:47,789 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:56:47,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:56:47,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:56:47,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:56:47,790 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:56:47,790 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 18:56:47,790 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 18:56:47,790 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 18:56:47,791 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 18:56:47,791 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 18:56:47,791 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 18:56:47,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:56:47,791 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 18:56:47,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:56:47,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:56:47,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 18:56:47,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 18:56:47,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 18:56:47,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:56:47,792 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 18:56:47,792 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:56:47,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 18:56:47,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:56:47,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:56:47,793 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 18:56:47,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:56:47,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:56:47,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:56:47,794 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 18:56:47,795 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 18:56:47,795 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_76a8601b-2006-48cd-bcd2-8bbc8577f205/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 -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2019-12-07 18:56:47,928 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:56:47,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:56:47,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:56:47,938 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:56:47,939 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:56:47,939 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-12-07 18:56:47,976 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/data/54005575e/a4368376c91e4aa0b609bc640bbbc881/FLAG0be106614 [2019-12-07 18:56:48,395 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:56:48,396 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-12-07 18:56:48,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/data/54005575e/a4368376c91e4aa0b609bc640bbbc881/FLAG0be106614 [2019-12-07 18:56:48,408 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/data/54005575e/a4368376c91e4aa0b609bc640bbbc881 [2019-12-07 18:56:48,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:56:48,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:56:48,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:56:48,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:56:48,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:56:48,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1127a676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48, skipping insertion in model container [2019-12-07 18:56:48,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:56:48,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:56:48,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:56:48,535 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:56:48,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:56:48,594 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:56:48,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48 WrapperNode [2019-12-07 18:56:48,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:56:48,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:56:48,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:56:48,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:56:48,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:56:48,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:56:48,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:56:48,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:56:48,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... [2019-12-07 18:56:48,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:56:48,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:56:48,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:56:48,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:56:48,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/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 18:56:48,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 18:56:48,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:56:48,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:56:48,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 18:56:48,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 18:56:48,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 18:56:48,789 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:56:48,790 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 18:56:48,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:56:48 BoogieIcfgContainer [2019-12-07 18:56:48,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:56:48,791 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 18:56:48,791 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 18:56:48,794 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 18:56:48,795 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 18:56:48,795 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 06:56:48" (1/3) ... [2019-12-07 18:56:48,796 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5629d7ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 06:56:48, skipping insertion in model container [2019-12-07 18:56:48,796 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 18:56:48,797 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:56:48" (2/3) ... [2019-12-07 18:56:48,797 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5629d7ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 06:56:48, skipping insertion in model container [2019-12-07 18:56:48,797 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 18:56:48,797 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:56:48" (3/3) ... [2019-12-07 18:56:48,799 INFO L371 chiAutomizerObserver]: Analyzing ICFG NonTermination3-1.c [2019-12-07 18:56:48,834 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 18:56:48,834 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 18:56:48,834 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 18:56:48,834 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:56:48,834 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:56:48,835 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 18:56:48,835 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:56:48,835 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 18:56:48,845 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states. [2019-12-07 18:56:48,859 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2019-12-07 18:56:48,859 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:48,859 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:48,863 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 18:56:48,863 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-12-07 18:56:48,863 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 18:56:48,864 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states. [2019-12-07 18:56:48,864 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2019-12-07 18:56:48,864 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:48,864 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:48,865 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 18:56:48,865 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-12-07 18:56:48,870 INFO L794 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 3#L-1true havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 5#L13-3true [2019-12-07 18:56:48,871 INFO L796 eck$LassoCheckResult]: Loop: 5#L13-3true assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 7#L13-2true main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 5#L13-3true [2019-12-07 18:56:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2019-12-07 18:56:48,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:48,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165509179] [2019-12-07 18:56:48,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:48,968 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1283, now seen corresponding path program 1 times [2019-12-07 18:56:48,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:48,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042855831] [2019-12-07 18:56:48,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:48,980 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2019-12-07 18:56:48,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:48,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610693374] [2019-12-07 18:56:48,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:49,004 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:49,119 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 18:56:49,120 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 18:56:49,120 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 18:56:49,120 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 18:56:49,120 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 18:56:49,120 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:56:49,120 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 18:56:49,120 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 18:56:49,120 INFO L133 ssoRankerPreferences]: Filename of dumped script: NonTermination3-1.c_Iteration1_Lasso [2019-12-07 18:56:49,120 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 18:56:49,121 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 18:56:49,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:56:49,141 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 18:56:49,142 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 18:56:49,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 18:56:49,174 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 18:56:49,175 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 18:56:49,184 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 18:56:49,185 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 18:56:49,186 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 18:56:49,188 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 18:56:49,282 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 18:56:49,287 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 2 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 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:56:49,291 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 18:56:49,293 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:56:49,293 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:56:49,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:56:49,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:56:49,294 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:56:49,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:56:49,295 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:56:49,297 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 3 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 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:56:49,301 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 18:56:49,302 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:56:49,302 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:56:49,302 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:56:49,303 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:56:49,303 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:56:49,303 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:56:49,303 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:56:49,304 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:56:49,308 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 18:56:49,309 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:56:49,309 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:56:49,309 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:56:49,309 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:56:49,310 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:56:49,310 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:56:49,310 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:56:49,311 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:56:49,315 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 18:56:49,316 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:56:49,316 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:56:49,317 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:56:49,317 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:56:49,319 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 18:56:49,320 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 18:56:49,323 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:56:49,328 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 18:56:49,329 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:56:49,330 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:56:49,330 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:56:49,330 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:56:49,332 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 18:56:49,332 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 18:56:49,335 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:56:49,338 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 18:56:49,340 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:56:49,340 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:56:49,340 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:56:49,340 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:56:49,343 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 18:56:49,343 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 18:56:49,347 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:56:49,351 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 18:56:49,353 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:56:49,353 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:56:49,353 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:56:49,353 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:56:49,353 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:56:49,354 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:56:49,354 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:56:49,355 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 18:56:49,360 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 18:56:49,362 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:56:49,362 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 18:56:49,362 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:56:49,362 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:56:49,362 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:56:49,362 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 18:56:49,362 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 18:56:49,364 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/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 18:56:49,367 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 18:56:49,369 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 18:56:49,369 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 18:56:49,369 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 18:56:49,369 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 18:56:49,373 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 18:56:49,373 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 18:56:49,381 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 18:56:49,400 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2019-12-07 18:56:49,400 INFO L444 ModelExtractionUtils]: 0 out of 13 variables were initially zero. Simplification set additionally 10 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/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 18:56:49,407 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 18:56:49,411 INFO L438 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 2. [2019-12-07 18:56:49,412 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 18:56:49,412 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0) = -2*ULTIMATE.start_main_~n~0 + 19 Supporting invariants [] [2019-12-07 18:56:49,418 INFO L297 tatePredicateManager]: 1 out of 1 supporting invariants were superfluous and have been removed [2019-12-07 18:56:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:49,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 18:56:49,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:49,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:56:49,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:49,462 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 18:56:49,473 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 18:56:49,474 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states. Second operand 3 states. [2019-12-07 18:56:49,505 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states.. Second operand 3 states. Result 28 states and 40 transitions. Complement of second has 7 states. [2019-12-07 18:56:49,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 18:56:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 18:56:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2019-12-07 18:56:49,508 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 2 letters. Loop has 2 letters. [2019-12-07 18:56:49,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:56:49,509 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 4 letters. Loop has 2 letters. [2019-12-07 18:56:49,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:56:49,509 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 2 letters. Loop has 4 letters. [2019-12-07 18:56:49,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 18:56:49,510 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 40 transitions. [2019-12-07 18:56:49,512 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:49,515 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 9 states and 12 transitions. [2019-12-07 18:56:49,516 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:49,516 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-12-07 18:56:49,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2019-12-07 18:56:49,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:49,517 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2019-12-07 18:56:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2019-12-07 18:56:49,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2019-12-07 18:56:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 18:56:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2019-12-07 18:56:49,536 INFO L711 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-12-07 18:56:49,536 INFO L591 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-12-07 18:56:49,536 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 18:56:49,536 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2019-12-07 18:56:49,537 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:49,537 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:49,537 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:49,537 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-12-07 18:56:49,537 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:49,538 INFO L794 eck$LassoCheckResult]: Stem: 88#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 84#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 85#L13-3 assume !(main_~n~0 < 10); 83#L17-4 [2019-12-07 18:56:49,538 INFO L796 eck$LassoCheckResult]: Loop: 83#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 89#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 82#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 83#L17-4 [2019-12-07 18:56:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:49,538 INFO L82 PathProgramCache]: Analyzing trace with hash 29861, now seen corresponding path program 1 times [2019-12-07 18:56:49,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:49,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037662312] [2019-12-07 18:56:49,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:49,570 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 18:56:49,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037662312] [2019-12-07 18:56:49,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:56:49,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 18:56:49,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136717332] [2019-12-07 18:56:49,573 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:49,573 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 1 times [2019-12-07 18:56:49,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:49,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135360896] [2019-12-07 18:56:49,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:49,586 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:49,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:49,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:56:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:56:49,675 INFO L87 Difference]: Start difference. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand 3 states. [2019-12-07 18:56:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:49,684 INFO L93 Difference]: Finished difference Result 9 states and 11 transitions. [2019-12-07 18:56:49,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:56:49,684 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 11 transitions. [2019-12-07 18:56:49,685 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:49,685 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 11 transitions. [2019-12-07 18:56:49,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:49,685 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:49,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2019-12-07 18:56:49,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:49,686 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-12-07 18:56:49,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2019-12-07 18:56:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2019-12-07 18:56:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 18:56:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2019-12-07 18:56:49,687 INFO L711 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2019-12-07 18:56:49,687 INFO L591 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2019-12-07 18:56:49,687 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 18:56:49,687 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 10 transitions. [2019-12-07 18:56:49,687 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:49,687 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:49,688 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:49,688 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2019-12-07 18:56:49,688 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:49,688 INFO L794 eck$LassoCheckResult]: Stem: 111#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 105#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 106#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 109#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 110#L13-3 assume !(main_~n~0 < 10); 108#L17-4 [2019-12-07 18:56:49,688 INFO L796 eck$LassoCheckResult]: Loop: 108#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 112#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 107#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 108#L17-4 [2019-12-07 18:56:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:49,688 INFO L82 PathProgramCache]: Analyzing trace with hash 28698723, now seen corresponding path program 1 times [2019-12-07 18:56:49,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:49,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70773592] [2019-12-07 18:56:49,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:49,707 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 18:56:49,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70773592] [2019-12-07 18:56:49,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976313773] [2019-12-07 18:56:49,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:56:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:49,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 18:56:49,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:49,738 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 18:56:49,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:56:49,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-12-07 18:56:49,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152686159] [2019-12-07 18:56:49,739 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:49,739 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 2 times [2019-12-07 18:56:49,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:49,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320340401] [2019-12-07 18:56:49,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:49,753 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:49,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:49,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:56:49,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:56:49,845 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. cyclomatic complexity: 4 Second operand 5 states. [2019-12-07 18:56:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:49,857 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2019-12-07 18:56:49,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:56:49,858 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2019-12-07 18:56:49,858 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:49,859 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 13 transitions. [2019-12-07 18:56:49,859 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:49,859 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:49,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 13 transitions. [2019-12-07 18:56:49,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:49,859 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-12-07 18:56:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 13 transitions. [2019-12-07 18:56:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-12-07 18:56:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 18:56:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-12-07 18:56:49,860 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-12-07 18:56:49,860 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-12-07 18:56:49,860 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 18:56:49,860 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 12 transitions. [2019-12-07 18:56:49,861 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:49,861 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:49,861 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:49,861 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2019-12-07 18:56:49,861 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:49,861 INFO L794 eck$LassoCheckResult]: Stem: 151#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 144#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 145#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 148#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 149#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 150#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 153#L13-3 assume !(main_~n~0 < 10); 147#L17-4 [2019-12-07 18:56:49,862 INFO L796 eck$LassoCheckResult]: Loop: 147#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 152#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 146#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 147#L17-4 [2019-12-07 18:56:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:49,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1809671329, now seen corresponding path program 2 times [2019-12-07 18:56:49,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:49,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700470854] [2019-12-07 18:56:49,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:49,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700470854] [2019-12-07 18:56:49,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107980558] [2019-12-07 18:56:49,885 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:56:49,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:56:49,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:56:49,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 18:56:49,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:49,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:56:49,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-07 18:56:49,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572948644] [2019-12-07 18:56:49,917 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:49,918 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 3 times [2019-12-07 18:56:49,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:49,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42310521] [2019-12-07 18:56:49,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:49,928 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:50,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:50,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:56:50,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:56:50,012 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. cyclomatic complexity: 4 Second operand 6 states. [2019-12-07 18:56:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:50,024 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-12-07 18:56:50,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:56:50,025 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 15 transitions. [2019-12-07 18:56:50,025 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,026 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 15 transitions. [2019-12-07 18:56:50,026 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:50,026 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:50,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2019-12-07 18:56:50,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:50,026 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-12-07 18:56:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2019-12-07 18:56:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-12-07 18:56:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 18:56:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-12-07 18:56:50,027 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-12-07 18:56:50,027 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-12-07 18:56:50,027 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-12-07 18:56:50,028 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 14 transitions. [2019-12-07 18:56:50,028 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,028 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:50,028 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:50,028 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1] [2019-12-07 18:56:50,028 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:50,029 INFO L794 eck$LassoCheckResult]: Stem: 201#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 196#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 197#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 198#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 199#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 200#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 205#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 204#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 203#L13-3 assume !(main_~n~0 < 10); 195#L17-4 [2019-12-07 18:56:50,029 INFO L796 eck$LassoCheckResult]: Loop: 195#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 202#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 194#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 195#L17-4 [2019-12-07 18:56:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash -367605409, now seen corresponding path program 3 times [2019-12-07 18:56:50,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368244225] [2019-12-07 18:56:50,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368244225] [2019-12-07 18:56:50,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979831895] [2019-12-07 18:56:50,059 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:56:50,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 18:56:50,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:56:50,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 18:56:50,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:56:50,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-07 18:56:50,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395537426] [2019-12-07 18:56:50,097 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 4 times [2019-12-07 18:56:50,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207257260] [2019-12-07 18:56:50,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,108 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:50,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:56:50,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:56:50,179 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. cyclomatic complexity: 4 Second operand 7 states. [2019-12-07 18:56:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:50,193 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-12-07 18:56:50,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:56:50,193 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2019-12-07 18:56:50,194 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,194 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 17 transitions. [2019-12-07 18:56:50,194 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:50,194 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:50,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 17 transitions. [2019-12-07 18:56:50,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:50,194 INFO L688 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-12-07 18:56:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 17 transitions. [2019-12-07 18:56:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 18:56:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 18:56:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-12-07 18:56:50,196 INFO L711 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-07 18:56:50,196 INFO L591 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-07 18:56:50,196 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-12-07 18:56:50,196 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 16 transitions. [2019-12-07 18:56:50,196 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,196 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:50,196 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:50,197 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 1, 1, 1] [2019-12-07 18:56:50,197 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:50,197 INFO L794 eck$LassoCheckResult]: Stem: 262#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 255#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 256#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 259#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 260#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 261#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 263#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 268#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 267#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 266#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 265#L13-3 assume !(main_~n~0 < 10); 258#L17-4 [2019-12-07 18:56:50,197 INFO L796 eck$LassoCheckResult]: Loop: 258#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 264#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 257#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 258#L17-4 [2019-12-07 18:56:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1081477475, now seen corresponding path program 4 times [2019-12-07 18:56:50,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492124278] [2019-12-07 18:56:50,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492124278] [2019-12-07 18:56:50,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898288193] [2019-12-07 18:56:50,235 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:56:50,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:56:50,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:56:50,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:56:50,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:56:50,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 18:56:50,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552814426] [2019-12-07 18:56:50,266 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:50,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,267 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 5 times [2019-12-07 18:56:50,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955685570] [2019-12-07 18:56:50,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,274 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:50,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:50,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:56:50,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:56:50,342 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. cyclomatic complexity: 4 Second operand 8 states. [2019-12-07 18:56:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:50,357 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-12-07 18:56:50,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:56:50,358 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 19 transitions. [2019-12-07 18:56:50,358 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,358 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 17 states and 19 transitions. [2019-12-07 18:56:50,359 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:50,359 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:50,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 19 transitions. [2019-12-07 18:56:50,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:50,359 INFO L688 BuchiCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-12-07 18:56:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 19 transitions. [2019-12-07 18:56:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-12-07 18:56:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 18:56:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-12-07 18:56:50,360 INFO L711 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-12-07 18:56:50,360 INFO L591 BuchiCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-12-07 18:56:50,360 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-12-07 18:56:50,360 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 18 transitions. [2019-12-07 18:56:50,361 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,361 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:50,361 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:50,361 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 1, 1, 1] [2019-12-07 18:56:50,361 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:50,361 INFO L794 eck$LassoCheckResult]: Stem: 334#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 329#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 330#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 331#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 332#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 333#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 335#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 342#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 341#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 340#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 339#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 338#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 337#L13-3 assume !(main_~n~0 < 10); 328#L17-4 [2019-12-07 18:56:50,361 INFO L796 eck$LassoCheckResult]: Loop: 328#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 336#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 327#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 328#L17-4 [2019-12-07 18:56:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash 82234459, now seen corresponding path program 5 times [2019-12-07 18:56:50,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009856738] [2019-12-07 18:56:50,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009856738] [2019-12-07 18:56:50,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393597983] [2019-12-07 18:56:50,405 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:56:50,436 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 18:56:50,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:56:50,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 18:56:50,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:56:50,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-07 18:56:50,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323954871] [2019-12-07 18:56:50,449 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,449 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 6 times [2019-12-07 18:56:50,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896036291] [2019-12-07 18:56:50,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,456 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:50,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:50,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 18:56:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:56:50,527 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. cyclomatic complexity: 4 Second operand 9 states. [2019-12-07 18:56:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:50,548 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-12-07 18:56:50,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:56:50,548 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 21 transitions. [2019-12-07 18:56:50,548 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,549 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 19 states and 21 transitions. [2019-12-07 18:56:50,549 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:50,549 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:50,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2019-12-07 18:56:50,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:50,549 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-12-07 18:56:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2019-12-07 18:56:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-12-07 18:56:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 18:56:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-12-07 18:56:50,551 INFO L711 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-12-07 18:56:50,551 INFO L591 BuchiCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-12-07 18:56:50,551 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-12-07 18:56:50,551 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 20 transitions. [2019-12-07 18:56:50,551 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,551 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:50,551 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:50,552 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 1, 1, 1] [2019-12-07 18:56:50,552 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:50,552 INFO L794 eck$LassoCheckResult]: Stem: 417#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 410#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 411#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 414#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 415#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 416#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 418#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 427#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 426#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 425#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 424#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 423#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 422#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 421#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 420#L13-3 assume !(main_~n~0 < 10); 413#L17-4 [2019-12-07 18:56:50,552 INFO L796 eck$LassoCheckResult]: Loop: 413#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 419#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 412#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 413#L17-4 [2019-12-07 18:56:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1717906073, now seen corresponding path program 6 times [2019-12-07 18:56:50,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134999507] [2019-12-07 18:56:50,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:50,595 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 18:56:50,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134999507] [2019-12-07 18:56:50,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106495941] [2019-12-07 18:56:50,595 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:56:50,621 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 18:56:50,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:56:50,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:56:50,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:50,629 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 18:56:50,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:56:50,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 18:56:50,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98890611] [2019-12-07 18:56:50,629 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,630 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 7 times [2019-12-07 18:56:50,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714520563] [2019-12-07 18:56:50,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,636 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:50,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:50,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:56:50,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:56:50,706 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. cyclomatic complexity: 4 Second operand 10 states. [2019-12-07 18:56:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:50,724 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-12-07 18:56:50,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:56:50,724 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 23 transitions. [2019-12-07 18:56:50,725 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,725 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 21 states and 23 transitions. [2019-12-07 18:56:50,725 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:50,725 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:50,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 23 transitions. [2019-12-07 18:56:50,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:50,725 INFO L688 BuchiCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-12-07 18:56:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 23 transitions. [2019-12-07 18:56:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-12-07 18:56:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 18:56:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-12-07 18:56:50,727 INFO L711 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-12-07 18:56:50,727 INFO L591 BuchiCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-12-07 18:56:50,727 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-12-07 18:56:50,727 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 22 transitions. [2019-12-07 18:56:50,727 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,727 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:50,727 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:50,728 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 1, 1, 1] [2019-12-07 18:56:50,728 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:50,728 INFO L794 eck$LassoCheckResult]: Stem: 511#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 504#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 505#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 508#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 509#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 510#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 512#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 523#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 522#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 521#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 520#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 519#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 518#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 517#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 516#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 515#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 514#L13-3 assume !(main_~n~0 < 10); 507#L17-4 [2019-12-07 18:56:50,728 INFO L796 eck$LassoCheckResult]: Loop: 507#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 513#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 506#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 507#L17-4 [2019-12-07 18:56:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1640296791, now seen corresponding path program 7 times [2019-12-07 18:56:50,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847456939] [2019-12-07 18:56:50,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847456939] [2019-12-07 18:56:50,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109621461] [2019-12-07 18:56:50,774 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:56:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:50,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 18:56:50,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:56:50,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-07 18:56:50,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131775229] [2019-12-07 18:56:50,806 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,806 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 8 times [2019-12-07 18:56:50,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197621640] [2019-12-07 18:56:50,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:50,814 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:50,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 18:56:50,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:56:50,881 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. cyclomatic complexity: 4 Second operand 11 states. [2019-12-07 18:56:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:50,907 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-12-07 18:56:50,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:56:50,907 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 25 transitions. [2019-12-07 18:56:50,908 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,908 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 23 states and 25 transitions. [2019-12-07 18:56:50,908 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:50,908 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:50,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 25 transitions. [2019-12-07 18:56:50,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:50,908 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-12-07 18:56:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 25 transitions. [2019-12-07 18:56:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-12-07 18:56:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:56:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-12-07 18:56:50,910 INFO L711 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-12-07 18:56:50,910 INFO L591 BuchiCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-12-07 18:56:50,910 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-12-07 18:56:50,910 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 24 transitions. [2019-12-07 18:56:50,910 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:50,910 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:50,910 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:50,911 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 1, 1, 1] [2019-12-07 18:56:50,911 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:50,911 INFO L794 eck$LassoCheckResult]: Stem: 616#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 611#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 612#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 613#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 614#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 615#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 617#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 630#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 629#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 628#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 627#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 626#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 625#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 624#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 623#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 622#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 621#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 620#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 619#L13-3 assume !(main_~n~0 < 10); 610#L17-4 [2019-12-07 18:56:50,911 INFO L796 eck$LassoCheckResult]: Loop: 610#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 618#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 609#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 610#L17-4 [2019-12-07 18:56:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,911 INFO L82 PathProgramCache]: Analyzing trace with hash 72220821, now seen corresponding path program 8 times [2019-12-07 18:56:50,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604388047] [2019-12-07 18:56:50,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604388047] [2019-12-07 18:56:50,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737614910] [2019-12-07 18:56:50,963 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:56:50,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:56:50,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:56:50,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:56:50,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:50,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:56:50,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-07 18:56:50,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29475234] [2019-12-07 18:56:50,998 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:50,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:50,998 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 9 times [2019-12-07 18:56:50,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:50,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257893606] [2019-12-07 18:56:50,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,005 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:51,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:51,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:56:51,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:56:51,076 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. cyclomatic complexity: 4 Second operand 12 states. [2019-12-07 18:56:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:51,096 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-12-07 18:56:51,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:56:51,096 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 27 transitions. [2019-12-07 18:56:51,097 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:51,097 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 25 states and 27 transitions. [2019-12-07 18:56:51,097 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:51,097 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:51,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 27 transitions. [2019-12-07 18:56:51,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:51,097 INFO L688 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-12-07 18:56:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 27 transitions. [2019-12-07 18:56:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-12-07 18:56:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 18:56:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-12-07 18:56:51,099 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-12-07 18:56:51,099 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-12-07 18:56:51,099 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-12-07 18:56:51,099 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 26 transitions. [2019-12-07 18:56:51,099 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:51,099 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:51,099 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:51,100 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 1, 1, 1] [2019-12-07 18:56:51,100 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:51,100 INFO L794 eck$LassoCheckResult]: Stem: 732#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 727#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 728#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 729#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 730#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 731#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 733#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 748#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 747#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 746#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 745#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 744#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 743#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 742#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 741#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 740#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 739#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 738#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 737#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 736#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 735#L13-3 assume !(main_~n~0 < 10); 726#L17-4 [2019-12-07 18:56:51,100 INFO L796 eck$LassoCheckResult]: Loop: 726#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 734#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 725#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 726#L17-4 [2019-12-07 18:56:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash 684734547, now seen corresponding path program 9 times [2019-12-07 18:56:51,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:51,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367127725] [2019-12-07 18:56:51,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:56:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:51,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367127725] [2019-12-07 18:56:51,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984757672] [2019-12-07 18:56:51,163 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:56:51,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 18:56:51,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:56:51,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 18:56:51,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:56:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:56:51,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:56:51,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-07 18:56:51,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869010293] [2019-12-07 18:56:51,233 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 18:56:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:51,233 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 10 times [2019-12-07 18:56:51,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:51,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629031453] [2019-12-07 18:56:51,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,239 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:51,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:56:51,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 18:56:51,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:56:51,305 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. cyclomatic complexity: 4 Second operand 13 states. [2019-12-07 18:56:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:56:51,335 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-12-07 18:56:51,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 18:56:51,335 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 28 transitions. [2019-12-07 18:56:51,335 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:51,336 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 26 states and 28 transitions. [2019-12-07 18:56:51,336 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-12-07 18:56:51,336 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-12-07 18:56:51,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 28 transitions. [2019-12-07 18:56:51,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 18:56:51,336 INFO L688 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-12-07 18:56:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 28 transitions. [2019-12-07 18:56:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 18:56:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:56:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-12-07 18:56:51,337 INFO L711 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-12-07 18:56:51,338 INFO L591 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-12-07 18:56:51,338 INFO L424 BuchiCegarLoop]: ======== Iteration 12============ [2019-12-07 18:56:51,338 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2019-12-07 18:56:51,338 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 18:56:51,338 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 18:56:51,338 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 18:56:51,339 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [10, 10, 1, 1, 1] [2019-12-07 18:56:51,339 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 18:56:51,339 INFO L794 eck$LassoCheckResult]: Stem: 858#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; 853#L-1 havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~pre1, main_~n~0, main_#t~nondet5, main_#t~mem3, main_#t~short4, main_~i~0, main_~#a~0.base, main_~#a~0.offset;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;call main_~#a~0.base, main_~#a~0.offset := #Ultimate.allocOnStack(40);main_~n~0 := 0; 854#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 855#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 856#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 857#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 859#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 876#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 875#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 874#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 873#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 872#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 871#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 870#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 869#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 868#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 867#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 866#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 865#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 864#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 863#L13-3 assume !!(main_~n~0 < 10);call write~int(main_#t~nondet2, main_~#a~0.base, main_~#a~0.offset + 4 * main_~n~0, 4);havoc main_#t~nondet2; 862#L13-2 main_#t~pre1 := 1 + main_~n~0;main_~n~0 := 1 + main_~n~0;havoc main_#t~pre1; 861#L13-3 assume !(main_~n~0 < 10); 852#L17-4 [2019-12-07 18:56:51,339 INFO L796 eck$LassoCheckResult]: Loop: 852#L17-4 main_#t~short4 := 0 <= main_~i~0 && main_~i~0 < 10; 860#L17 assume main_#t~short4;call main_#t~mem3 := read~int(main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4);main_#t~short4 := main_#t~mem3 >= 0; 851#L17-2 assume !!main_#t~short4;havoc main_#t~mem3;havoc main_#t~short4;main_~i~0 := main_#t~nondet5;havoc main_#t~nondet5;call write~int(0, main_~#a~0.base, main_~#a~0.offset + 4 * main_~i~0, 4); 852#L17-4 [2019-12-07 18:56:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash 899905681, now seen corresponding path program 10 times [2019-12-07 18:56:51,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:51,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807417321] [2019-12-07 18:56:51,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,356 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:51,356 INFO L82 PathProgramCache]: Analyzing trace with hash 48762, now seen corresponding path program 11 times [2019-12-07 18:56:51,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:51,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300656418] [2019-12-07 18:56:51,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,361 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:56:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash -95699990, now seen corresponding path program 1 times [2019-12-07 18:56:51,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:56:51,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233516622] [2019-12-07 18:56:51,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:56:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:56:51,389 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:56:54,079 WARN L192 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 212 DAG size of output: 148 [2019-12-07 18:56:54,246 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2019-12-07 18:56:54,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 06:56:54 BoogieIcfgContainer [2019-12-07 18:56:54,273 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 18:56:54,273 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:56:54,273 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:56:54,273 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:56:54,273 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:56:48" (3/4) ... [2019-12-07 18:56:54,275 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-12-07 18:56:54,308 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_76a8601b-2006-48cd-bcd2-8bbc8577f205/bin/uautomizer/witness.graphml [2019-12-07 18:56:54,308 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:56:54,309 INFO L168 Benchmark]: Toolchain (without parser) took 5898.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.9 MB). Free memory was 939.3 MB in the beginning and 1.0 GB in the end (delta: -71.7 MB). Peak memory consumption was 88.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:56:54,310 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:56:54,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.37 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -176.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2019-12-07 18:56:54,310 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.71 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:56:54,311 INFO L168 Benchmark]: Boogie Preprocessor took 15.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:56:54,311 INFO L168 Benchmark]: RCFGBuilder took 157.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:56:54,311 INFO L168 Benchmark]: BuchiAutomizer took 5481.87 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 41.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 83.1 MB). Peak memory consumption was 125.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:56:54,312 INFO L168 Benchmark]: Witness Printer took 35.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:56:54,314 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 183.37 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -176.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.71 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 157.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5481.87 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 41.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 83.1 MB). Peak memory consumption was 125.0 MB. Max. memory is 11.5 GB. * Witness Printer took 35.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 11 terminating modules (10 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -2 * n + 19 and consists of 5 locations. 10 modules have a trivial ranking function, the largest among these consists of 13 locations. The remainder module has 26 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.4s and 12 iterations. TraceHistogramMax:10. Analysis of lassos took 5.0s. Construction of modules took 0.1s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 11. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 10 StatesRemovedByMinimization, 10 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 26 states and ocurred in iteration 11. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 80 SDtfs, 65 SDslu, 251 SDs, 0 SdLazy, 188 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU10 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital88 mio100 ax100 hnf100 lsp93 ukn59 mio100 lsp69 div100 bol100 ite100 ukn100 eq152 hnf92 smp100 dnf100 smp100 tf100 neg100 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 10ms VariablesStem: 1 VariablesLoop: 1 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTArraySubscriptExpression@9f3ec79=0, NULL=0, \result=0, NULL=1, n=10, i=7, a=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4b1b6794=7, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@8288e2a=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@57214454=0, a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7bec5d7b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@7f8d6ed9=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 9]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND FALSE !(n < 10) Loop: [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] EXPR a[i] [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...