./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:00:55,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:00:55,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:00:55,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:00:55,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:00:55,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:00:55,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:00:55,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:00:55,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:00:55,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:00:55,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:00:55,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:00:55,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:00:55,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:00:55,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:00:55,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:00:55,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:00:55,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:00:55,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:00:55,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:00:55,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:00:55,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:00:55,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:00:55,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:00:55,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:00:55,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:00:55,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:00:55,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:00:55,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:00:55,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:00:55,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:00:55,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:00:55,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:00:55,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:00:55,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:00:55,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:00:55,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:00:55,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:00:55,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:00:55,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:00:55,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:00:55,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:00:55,900 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:00:55,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:00:55,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:00:55,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:00:55,901 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:00:55,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:00:55,902 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:00:55,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:00:55,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:00:55,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:00:55,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:00:55,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:00:55,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:00:55,903 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:00:55,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:00:55,903 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:00:55,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:00:55,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:00:55,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:00:55,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:00:55,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:00:55,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:00:55,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:00:55,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:00:55,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:00:55,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:00:55,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:00:55,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:00:55,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/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(G ! call(__VERIFIER_error())) ) 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 [2019-10-22 09:00:55,931 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:00:55,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:00:55,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:00:55,946 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:00:55,946 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:00:55,947 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-10-22 09:00:55,995 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/data/a2ca0878f/83af3ded1674498fbd086464e131e788/FLAGb1c5263c2 [2019-10-22 09:00:56,409 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:00:56,410 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-10-22 09:00:56,416 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/data/a2ca0878f/83af3ded1674498fbd086464e131e788/FLAGb1c5263c2 [2019-10-22 09:00:56,429 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/data/a2ca0878f/83af3ded1674498fbd086464e131e788 [2019-10-22 09:00:56,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:00:56,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:00:56,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:56,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:00:56,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:00:56,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b2ff5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56, skipping insertion in model container [2019-10-22 09:00:56,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,448 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:00:56,463 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:00:56,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:56,714 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:00:56,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:56,746 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:00:56,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56 WrapperNode [2019-10-22 09:00:56,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:56,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:56,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:00:56,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:00:56,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:56,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:00:56,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:00:56,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:00:56,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... [2019-10-22 09:00:56,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:00:56,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:00:56,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:00:56,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:00:56,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:00:56,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 09:00:56,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:00:56,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:00:56,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 09:00:56,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 09:00:56,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 09:00:57,187 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:00:57,188 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-10-22 09:00:57,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:57 BoogieIcfgContainer [2019-10-22 09:00:57,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:00:57,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:00:57,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:00:57,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:00:57,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:00:56" (1/3) ... [2019-10-22 09:00:57,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d94183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:57, skipping insertion in model container [2019-10-22 09:00:57,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:56" (2/3) ... [2019-10-22 09:00:57,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d94183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:57, skipping insertion in model container [2019-10-22 09:00:57,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:57" (3/3) ... [2019-10-22 09:00:57,209 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2019-10-22 09:00:57,218 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:00:57,224 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:00:57,231 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:00:57,248 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:00:57,248 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:00:57,248 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:00:57,248 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:00:57,249 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:00:57,249 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:00:57,249 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:00:57,249 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:00:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-22 09:00:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 09:00:57,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:57,265 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:57,267 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:57,271 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2019-10-22 09:00:57,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:57,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609674278] [2019-10-22 09:00:57,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:57,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:57,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:57,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609674278] [2019-10-22 09:00:57,386 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:57,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:00:57,387 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216262651] [2019-10-22 09:00:57,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 09:00:57,391 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:57,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 09:00:57,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:00:57,403 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-10-22 09:00:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:57,417 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2019-10-22 09:00:57,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 09:00:57,418 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-22 09:00:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:57,427 INFO L225 Difference]: With dead ends: 56 [2019-10-22 09:00:57,427 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 09:00:57,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:00:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 09:00:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 09:00:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:00:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-10-22 09:00:57,462 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2019-10-22 09:00:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:57,463 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-10-22 09:00:57,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 09:00:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-10-22 09:00:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 09:00:57,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:57,464 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:57,464 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:57,465 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2019-10-22 09:00:57,465 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:57,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283917218] [2019-10-22 09:00:57,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:57,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:57,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:57,476 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:00:57,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017816944] [2019-10-22 09:00:57,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:57,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:00:57,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:57,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283917218] [2019-10-22 09:00:57,570 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:00:57,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017816944] [2019-10-22 09:00:57,571 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:57,571 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:00:57,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74027425] [2019-10-22 09:00:57,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:00:57,573 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:57,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:00:57,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:57,573 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2019-10-22 09:00:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:57,588 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-10-22 09:00:57,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:00:57,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-22 09:00:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:57,589 INFO L225 Difference]: With dead ends: 50 [2019-10-22 09:00:57,589 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 09:00:57,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:57,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 09:00:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-22 09:00:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 09:00:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-10-22 09:00:57,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-10-22 09:00:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:57,595 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-10-22 09:00:57,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:00:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-10-22 09:00:57,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:00:57,596 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:57,596 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:57,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:57,797 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2019-10-22 09:00:57,797 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:57,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838601942] [2019-10-22 09:00:57,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:57,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:57,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:57,817 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:00:57,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048379957] [2019-10-22 09:00:57,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:57,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:00:57,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:57,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838601942] [2019-10-22 09:00:57,910 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:00:57,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048379957] [2019-10-22 09:00:57,911 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:57,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:00:57,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198065812] [2019-10-22 09:00:57,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:00:57,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:57,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:00:57,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:57,912 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-10-22 09:00:57,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:57,990 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-10-22 09:00:57,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:00:57,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-22 09:00:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:57,991 INFO L225 Difference]: With dead ends: 57 [2019-10-22 09:00:57,992 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 09:00:57,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 09:00:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-10-22 09:00:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 09:00:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-10-22 09:00:57,996 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2019-10-22 09:00:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:57,996 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-10-22 09:00:57,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:00:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-10-22 09:00:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-22 09:00:57,997 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:57,997 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:58,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:58,198 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:58,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:58,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2019-10-22 09:00:58,199 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:58,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947897049] [2019-10-22 09:00:58,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:58,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:58,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:58,213 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:00:58,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236982046] [2019-10-22 09:00:58,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:58,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 09:00:58,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 09:00:58,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947897049] [2019-10-22 09:00:58,287 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:00:58,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236982046] [2019-10-22 09:00:58,288 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:58,288 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:00:58,288 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010036133] [2019-10-22 09:00:58,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:00:58,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:00:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:58,289 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2019-10-22 09:00:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:58,380 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2019-10-22 09:00:58,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:00:58,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-22 09:00:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:58,381 INFO L225 Difference]: With dead ends: 75 [2019-10-22 09:00:58,381 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 09:00:58,382 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 09:00:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-10-22 09:00:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-22 09:00:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-10-22 09:00:58,388 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 28 [2019-10-22 09:00:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:58,388 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-10-22 09:00:58,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:00:58,388 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-10-22 09:00:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-22 09:00:58,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:58,389 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:58,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:58,590 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:58,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1168464304, now seen corresponding path program 1 times [2019-10-22 09:00:58,590 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:58,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049595868] [2019-10-22 09:00:58,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:58,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:58,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 09:00:58,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049595868] [2019-10-22 09:00:58,648 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:58,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:00:58,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773619093] [2019-10-22 09:00:58,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:00:58,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:58,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:00:58,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:58,649 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 4 states. [2019-10-22 09:00:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:58,702 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2019-10-22 09:00:58,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:00:58,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-10-22 09:00:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:58,703 INFO L225 Difference]: With dead ends: 85 [2019-10-22 09:00:58,703 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 09:00:58,704 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 09:00:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-10-22 09:00:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 09:00:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-10-22 09:00:58,710 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2019-10-22 09:00:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:58,710 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-10-22 09:00:58,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:00:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-10-22 09:00:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 09:00:58,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:58,711 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:58,711 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:58,712 INFO L82 PathProgramCache]: Analyzing trace with hash -483510003, now seen corresponding path program 1 times [2019-10-22 09:00:58,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:58,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985130416] [2019-10-22 09:00:58,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:58,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:58,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:58,722 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:00:58,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746001573] [2019-10-22 09:00:58,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:58,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:00:58,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 09:00:58,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985130416] [2019-10-22 09:00:58,787 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:00:58,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746001573] [2019-10-22 09:00:58,787 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:58,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:00:58,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566313737] [2019-10-22 09:00:58,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:00:58,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:58,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:00:58,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:58,789 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-10-22 09:00:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:58,800 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-10-22 09:00:58,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:00:58,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-10-22 09:00:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:58,801 INFO L225 Difference]: With dead ends: 54 [2019-10-22 09:00:58,801 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 09:00:58,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 09:00:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-22 09:00:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 09:00:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-10-22 09:00:58,806 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 37 [2019-10-22 09:00:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:58,806 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-10-22 09:00:58,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:00:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-10-22 09:00:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 09:00:58,807 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:58,807 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:59,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:59,008 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash -623311861, now seen corresponding path program 1 times [2019-10-22 09:00:59,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:59,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260784386] [2019-10-22 09:00:59,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:59,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:59,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:59,031 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:00:59,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542913602] [2019-10-22 09:00:59,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:59,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 09:00:59,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 09:00:59,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260784386] [2019-10-22 09:00:59,098 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:00:59,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542913602] [2019-10-22 09:00:59,098 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:00:59,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-22 09:00:59,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759278711] [2019-10-22 09:00:59,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:00:59,099 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:59,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:00:59,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:59,099 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2019-10-22 09:00:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:59,114 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-10-22 09:00:59,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:00:59,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-10-22 09:00:59,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:59,115 INFO L225 Difference]: With dead ends: 78 [2019-10-22 09:00:59,115 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 09:00:59,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 09:00:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-22 09:00:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 09:00:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-10-22 09:00:59,120 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-10-22 09:00:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:59,120 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-10-22 09:00:59,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:00:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-10-22 09:00:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-22 09:00:59,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:59,121 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:59,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:59,322 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:59,322 INFO L82 PathProgramCache]: Analyzing trace with hash -526389047, now seen corresponding path program 2 times [2019-10-22 09:00:59,322 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:59,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959606882] [2019-10-22 09:00:59,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:59,323 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:59,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:59,334 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:00:59,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029996896] [2019-10-22 09:00:59,334 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:59,403 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:59,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:59,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 09:00:59,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 09:00:59,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959606882] [2019-10-22 09:00:59,425 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:00:59,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029996896] [2019-10-22 09:00:59,425 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:00:59,426 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-22 09:00:59,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507289615] [2019-10-22 09:00:59,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:00:59,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:00:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:59,427 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 4 states. [2019-10-22 09:00:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:59,482 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-10-22 09:00:59,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:00:59,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-10-22 09:00:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:59,483 INFO L225 Difference]: With dead ends: 86 [2019-10-22 09:00:59,483 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 09:00:59,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 09:00:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-10-22 09:00:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-22 09:00:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-10-22 09:00:59,493 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2019-10-22 09:00:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:59,493 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-10-22 09:00:59,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:00:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-10-22 09:00:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-22 09:00:59,494 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:59,494 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:59,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:59,695 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:59,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104750, now seen corresponding path program 3 times [2019-10-22 09:00:59,696 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:59,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479059917] [2019-10-22 09:00:59,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:59,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:59,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:59,706 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:00:59,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098604633] [2019-10-22 09:00:59,707 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:59,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-22 09:00:59,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:59,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 09:00:59,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 09:00:59,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479059917] [2019-10-22 09:00:59,797 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:00:59,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098604633] [2019-10-22 09:00:59,797 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:00:59,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-22 09:00:59,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237076456] [2019-10-22 09:00:59,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:00:59,806 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:00:59,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:59,807 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2019-10-22 09:00:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:59,833 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-10-22 09:00:59,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:00:59,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-10-22 09:00:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:59,837 INFO L225 Difference]: With dead ends: 70 [2019-10-22 09:00:59,837 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 09:00:59,837 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 09:00:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-22 09:00:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 09:00:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-10-22 09:00:59,842 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 50 [2019-10-22 09:00:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:59,846 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-10-22 09:00:59,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:00:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-10-22 09:00:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-22 09:00:59,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:59,848 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:00,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:00,051 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1656359148, now seen corresponding path program 4 times [2019-10-22 09:01:00,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:00,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549981119] [2019-10-22 09:01:00,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:00,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:00,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:00,072 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:00,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258901866] [2019-10-22 09:01:00,079 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:00,124 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:00,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:00,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:01:00,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-22 09:01:00,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549981119] [2019-10-22 09:01:00,151 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:00,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258901866] [2019-10-22 09:01:00,151 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:00,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-22 09:01:00,151 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911256383] [2019-10-22 09:01:00,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:00,152 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:00,153 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2019-10-22 09:01:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:00,230 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2019-10-22 09:01:00,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:00,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-22 09:01:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:00,232 INFO L225 Difference]: With dead ends: 102 [2019-10-22 09:01:00,232 INFO L226 Difference]: Without dead ends: 62 [2019-10-22 09:01:00,232 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-22 09:01:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-22 09:01:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-22 09:01:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-10-22 09:01:00,245 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2019-10-22 09:01:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:00,246 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-10-22 09:01:00,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-10-22 09:01:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-22 09:01:00,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:00,247 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:00,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:00,451 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:00,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:00,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2133276057, now seen corresponding path program 5 times [2019-10-22 09:01:00,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:00,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067418794] [2019-10-22 09:01:00,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:00,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:00,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:00,463 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:00,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996516676] [2019-10-22 09:01:00,463 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:00,546 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-22 09:01:00,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:00,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 09:01:00,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-22 09:01:00,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067418794] [2019-10-22 09:01:00,569 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:00,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996516676] [2019-10-22 09:01:00,569 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:00,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:01:00,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999078336] [2019-10-22 09:01:00,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:00,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:00,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:00,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:00,573 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2019-10-22 09:01:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:00,615 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2019-10-22 09:01:00,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:00,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-10-22 09:01:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:00,617 INFO L225 Difference]: With dead ends: 111 [2019-10-22 09:01:00,617 INFO L226 Difference]: Without dead ends: 71 [2019-10-22 09:01:00,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-22 09:01:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-10-22 09:01:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-22 09:01:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-10-22 09:01:00,629 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 61 [2019-10-22 09:01:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:00,629 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-10-22 09:01:00,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-10-22 09:01:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-22 09:01:00,630 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:00,630 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:00,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:00,831 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:00,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2021142629, now seen corresponding path program 1 times [2019-10-22 09:01:00,831 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:00,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989777529] [2019-10-22 09:01:00,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:00,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:00,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:00,841 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:00,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991428324] [2019-10-22 09:01:00,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:00,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:01:00,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-22 09:01:00,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989777529] [2019-10-22 09:01:00,923 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:00,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991428324] [2019-10-22 09:01:00,924 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:00,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-22 09:01:00,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874394162] [2019-10-22 09:01:00,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:00,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:00,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:00,925 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 5 states. [2019-10-22 09:01:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:00,941 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2019-10-22 09:01:00,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:00,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-10-22 09:01:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:00,942 INFO L225 Difference]: With dead ends: 120 [2019-10-22 09:01:00,942 INFO L226 Difference]: Without dead ends: 65 [2019-10-22 09:01:00,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-22 09:01:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-22 09:01:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-22 09:01:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-10-22 09:01:00,948 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2019-10-22 09:01:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:00,949 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-10-22 09:01:00,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-10-22 09:01:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-22 09:01:00,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:00,950 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:01,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:01,150 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:01,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:01,151 INFO L82 PathProgramCache]: Analyzing trace with hash 265673379, now seen corresponding path program 2 times [2019-10-22 09:01:01,151 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:01,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449319012] [2019-10-22 09:01:01,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:01,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:01,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:01,164 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:01,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278375010] [2019-10-22 09:01:01,164 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/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 [2019-10-22 09:01:01,226 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:01,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:01,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:01:01,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-22 09:01:01,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449319012] [2019-10-22 09:01:01,260 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:01,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278375010] [2019-10-22 09:01:01,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:01,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-22 09:01:01,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210784707] [2019-10-22 09:01:01,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:01,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:01,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:01,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:01,263 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 6 states. [2019-10-22 09:01:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:01,278 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-10-22 09:01:01,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:01,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2019-10-22 09:01:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:01,279 INFO L225 Difference]: With dead ends: 122 [2019-10-22 09:01:01,280 INFO L226 Difference]: Without dead ends: 67 [2019-10-22 09:01:01,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:01,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-22 09:01:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-22 09:01:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-22 09:01:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2019-10-22 09:01:01,286 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2019-10-22 09:01:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:01,286 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2019-10-22 09:01:01,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2019-10-22 09:01:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-22 09:01:01,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:01,287 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:01,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:01,488 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:01,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1181871457, now seen corresponding path program 3 times [2019-10-22 09:01:01,488 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:01,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322798697] [2019-10-22 09:01:01,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:01,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:01,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:01,498 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:01,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817710457] [2019-10-22 09:01:01,499 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/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 [2019-10-22 09:01:01,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 09:01:01,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:01,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:01:01,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-22 09:01:01,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322798697] [2019-10-22 09:01:01,580 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:01,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817710457] [2019-10-22 09:01:01,580 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:01,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-22 09:01:01,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895155683] [2019-10-22 09:01:01,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:01,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:01,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:01,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:01,581 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2019-10-22 09:01:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:01,598 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2019-10-22 09:01:01,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:01,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-10-22 09:01:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:01,599 INFO L225 Difference]: With dead ends: 88 [2019-10-22 09:01:01,599 INFO L226 Difference]: Without dead ends: 69 [2019-10-22 09:01:01,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-22 09:01:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-22 09:01:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-22 09:01:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-10-22 09:01:01,603 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 65 [2019-10-22 09:01:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:01,604 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-10-22 09:01:01,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-10-22 09:01:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-22 09:01:01,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:01,604 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:01,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:01,805 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:01,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1302328097, now seen corresponding path program 4 times [2019-10-22 09:01:01,806 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:01,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520312744] [2019-10-22 09:01:01,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:01,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:01,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:01,815 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:01,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700953407] [2019-10-22 09:01:01,816 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/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 [2019-10-22 09:01:01,868 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:01,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:01,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:01,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-22 09:01:01,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520312744] [2019-10-22 09:01:01,900 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:01,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700953407] [2019-10-22 09:01:01,900 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:01,900 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-22 09:01:01,901 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613873840] [2019-10-22 09:01:01,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:01,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:01,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:01,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:01,901 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 7 states. [2019-10-22 09:01:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:02,005 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-10-22 09:01:02,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:02,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-10-22 09:01:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:02,006 INFO L225 Difference]: With dead ends: 120 [2019-10-22 09:01:02,006 INFO L226 Difference]: Without dead ends: 77 [2019-10-22 09:01:02,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-22 09:01:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-10-22 09:01:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-22 09:01:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-10-22 09:01:02,011 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 67 [2019-10-22 09:01:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:02,012 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-10-22 09:01:02,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-10-22 09:01:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-22 09:01:02,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:02,012 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:02,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:02,213 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash -153484414, now seen corresponding path program 5 times [2019-10-22 09:01:02,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:02,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527478718] [2019-10-22 09:01:02,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:02,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:02,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:02,224 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:02,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432604891] [2019-10-22 09:01:02,224 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/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 [2019-10-22 09:01:02,311 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 09:01:02,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:02,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:02,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-22 09:01:02,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527478718] [2019-10-22 09:01:02,353 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:02,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432604891] [2019-10-22 09:01:02,353 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:02,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-22 09:01:02,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713429738] [2019-10-22 09:01:02,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:02,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:02,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:02,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:02,354 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 7 states. [2019-10-22 09:01:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:02,378 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2019-10-22 09:01:02,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:02,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2019-10-22 09:01:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:02,379 INFO L225 Difference]: With dead ends: 145 [2019-10-22 09:01:02,379 INFO L226 Difference]: Without dead ends: 79 [2019-10-22 09:01:02,380 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-22 09:01:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-22 09:01:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-22 09:01:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-10-22 09:01:02,388 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2019-10-22 09:01:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:02,388 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-10-22 09:01:02,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-10-22 09:01:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-22 09:01:02,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:02,389 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:02,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:02,590 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:02,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:02,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 6 times [2019-10-22 09:01:02,590 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:02,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30710780] [2019-10-22 09:01:02,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:02,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:02,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:02,601 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:02,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28936992] [2019-10-22 09:01:02,602 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/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 [2019-10-22 09:01:03,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-22 09:01:03,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:03,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:01:03,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-10-22 09:01:03,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30710780] [2019-10-22 09:01:03,071 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-22 09:01:03,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28936992] [2019-10-22 09:01:03,071 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:03,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-22 09:01:03,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508917825] [2019-10-22 09:01:03,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:03,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:03,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:03,072 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2019-10-22 09:01:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:03,097 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2019-10-22 09:01:03,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:03,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-10-22 09:01:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:03,098 INFO L225 Difference]: With dead ends: 103 [2019-10-22 09:01:03,099 INFO L226 Difference]: Without dead ends: 81 [2019-10-22 09:01:03,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-22 09:01:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-10-22 09:01:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-22 09:01:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2019-10-22 09:01:03,103 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2019-10-22 09:01:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:03,103 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2019-10-22 09:01:03,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2019-10-22 09:01:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-22 09:01:03,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:03,104 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:03,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:03,305 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:03,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 7 times [2019-10-22 09:01:03,305 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:03,305 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958993317] [2019-10-22 09:01:03,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:03,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:03,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:03,316 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-22 09:01:03,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778162127] [2019-10-22 09:01:03,316 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/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 [2019-10-22 09:01:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:03,747 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:03,747 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:01:03,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:04,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:04 BoogieIcfgContainer [2019-10-22 09:01:04,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:04,001 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:04,001 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:04,001 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:04,002 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:57" (3/4) ... [2019-10-22 09:01:04,004 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:01:04,091 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_19108a15-f125-4edd-b740-4f1a7a118146/bin/uautomizer/witness.graphml [2019-10-22 09:01:04,094 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:04,096 INFO L168 Benchmark]: Toolchain (without parser) took 7662.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 951.2 MB in the beginning and 853.8 MB in the end (delta: 97.4 MB). Peak memory consumption was 221.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:04,097 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:04,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 951.2 MB in the beginning and 1.1 GB in the end (delta: -167.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:04,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:04,097 INFO L168 Benchmark]: Boogie Preprocessor took 24.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:04,098 INFO L168 Benchmark]: RCFGBuilder took 377.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:04,098 INFO L168 Benchmark]: TraceAbstraction took 6810.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 860.4 MB in the end (delta: 229.4 MB). Peak memory consumption was 229.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:04,098 INFO L168 Benchmark]: Witness Printer took 93.02 ms. Allocated memory is still 1.2 GB. Free memory was 860.4 MB in the beginning and 853.8 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:04,100 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 313.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 951.2 MB in the beginning and 1.1 GB in the end (delta: -167.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 377.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6810.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 860.4 MB in the end (delta: 229.4 MB). Peak memory consumption was 229.4 MB. Max. memory is 11.5 GB. * Witness Printer took 93.02 ms. Allocated memory is still 1.2 GB. Free memory was 860.4 MB in the beginning and 853.8 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] int x[5]; [L5] int i; [L6] i = 0 [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND FALSE !(i < 5) [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND FALSE !(i<5 -1) [L46] x[5 -1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 [L50] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.7s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 187 SDslu, 565 SDs, 0 SdLazy, 304 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 46 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 879 NumberOfCodeBlocks, 816 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 782 ConstructedInterpolants, 0 QuantifiedInterpolants, 52874 SizeOfPredicates, 14 NumberOfNonLiveVariables, 2293 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 745/820 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...