./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 457415f9b28998cf0ba7f80d69eaf14873f5a98f .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:01:03,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:03,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:03,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:03,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:03,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:03,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:03,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:03,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:03,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:03,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:03,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:03,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:03,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:03,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:03,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:03,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:03,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:03,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:03,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:03,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:03,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:03,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:03,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:03,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:03,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:03,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:03,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:03,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:03,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:03,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:03,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:03,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:03,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:03,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:03,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:03,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:03,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:03,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:03,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:03,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:03,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-10-22 09:01:03,925 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:03,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:03,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:03,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:03,928 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:03,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:03,928 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 09:01:03,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:03,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:03,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:03,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:03,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:03,929 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-10-22 09:01:03,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:03,930 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:03,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:03,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:03,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:03,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:03,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:03,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:03,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:03,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:03,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:03,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:03,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:01:03,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:03,932 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_0864997d-86f7-4773-b794-28c1d803673f/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 ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 457415f9b28998cf0ba7f80d69eaf14873f5a98f [2019-10-22 09:01:03,962 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:03,973 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:03,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:03,982 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:03,982 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:03,983 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2019-10-22 09:01:04,030 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/data/1bf4374e4/0ccd2cf133b5430388a28f18b1616e5c/FLAGadd957b9c [2019-10-22 09:01:04,399 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:04,400 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2019-10-22 09:01:04,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/data/1bf4374e4/0ccd2cf133b5430388a28f18b1616e5c/FLAGadd957b9c [2019-10-22 09:01:04,415 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/data/1bf4374e4/0ccd2cf133b5430388a28f18b1616e5c [2019-10-22 09:01:04,418 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:04,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:04,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:04,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:04,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:04,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c23e08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04, skipping insertion in model container [2019-10-22 09:01:04,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,434 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:04,448 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:04,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:04,629 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:04,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:04,741 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:04,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04 WrapperNode [2019-10-22 09:01:04,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:04,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:04,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:04,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:04,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:04,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:04,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:04,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:04,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... [2019-10-22 09:01:04,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:04,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:04,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:04,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:04,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-10-22 09:01:04,823 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-10-22 09:01:04,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:04,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:04,973 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:04,973 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 09:01:04,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:04 BoogieIcfgContainer [2019-10-22 09:01:04,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:04,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:04,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:04,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:04,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:04" (1/3) ... [2019-10-22 09:01:04,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132535d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:04, skipping insertion in model container [2019-10-22 09:01:04,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:04" (2/3) ... [2019-10-22 09:01:04,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132535d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:04, skipping insertion in model container [2019-10-22 09:01:04,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:04" (3/3) ... [2019-10-22 09:01:04,982 INFO L109 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5.c [2019-10-22 09:01:04,992 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:04,999 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-10-22 09:01:05,026 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-10-22 09:01:05,065 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:05,065 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:05,065 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:05,066 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:05,066 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:05,066 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:05,066 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:05,066 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-22 09:01:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 09:01:05,109 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:05,110 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:05,112 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:05,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861353, now seen corresponding path program 1 times [2019-10-22 09:01:05,131 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:05,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537347492] [2019-10-22 09:01:05,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:05,300 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 09:01:05,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537347492] [2019-10-22 09:01:05,301 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:05,301 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:01:05,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059984391] [2019-10-22 09:01:05,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:05,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:05,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:05,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:05,318 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2019-10-22 09:01:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:05,418 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-10-22 09:01:05,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:05,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-10-22 09:01:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:05,427 INFO L225 Difference]: With dead ends: 44 [2019-10-22 09:01:05,427 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 09:01:05,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 09:01:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-10-22 09:01:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 09:01:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-22 09:01:05,464 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2019-10-22 09:01:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:05,464 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-22 09:01:05,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-22 09:01:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 09:01:05,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:05,465 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:05,466 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861577, now seen corresponding path program 1 times [2019-10-22 09:01:05,466 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:05,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49362203] [2019-10-22 09:01:05,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:05,497 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 09:01:05,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49362203] [2019-10-22 09:01:05,498 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:05,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:01:05,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869563485] [2019-10-22 09:01:05,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:05,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:05,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:05,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:05,501 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2019-10-22 09:01:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:05,545 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-22 09:01:05,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:05,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-10-22 09:01:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:05,546 INFO L225 Difference]: With dead ends: 34 [2019-10-22 09:01:05,547 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 09:01:05,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 09:01:05,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2019-10-22 09:01:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:01:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-22 09:01:05,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2019-10-22 09:01:05,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:05,553 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-22 09:01:05,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-22 09:01:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:05,553 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:05,553 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:05,554 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1926938272, now seen corresponding path program 1 times [2019-10-22 09:01:05,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:05,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545861363] [2019-10-22 09:01:05,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:05,585 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 09:01:05,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545861363] [2019-10-22 09:01:05,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:05,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:01:05,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059564814] [2019-10-22 09:01:05,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:05,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:05,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:05,587 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-10-22 09:01:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:05,625 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-10-22 09:01:05,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:05,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-10-22 09:01:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:05,626 INFO L225 Difference]: With dead ends: 33 [2019-10-22 09:01:05,627 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 09:01:05,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 09:01:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-10-22 09:01:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 09:01:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-22 09:01:05,632 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2019-10-22 09:01:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:05,632 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-22 09:01:05,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-22 09:01:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:05,633 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:05,633 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:05,634 INFO L410 AbstractCegarLoop]: === Iteration 4 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:05,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1926931321, now seen corresponding path program 1 times [2019-10-22 09:01:05,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:05,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851886928] [2019-10-22 09:01:05,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:05,664 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 09:01:05,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851886928] [2019-10-22 09:01:05,665 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:05,665 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:01:05,665 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299816205] [2019-10-22 09:01:05,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:05,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:05,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:05,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:05,666 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-10-22 09:01:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:05,707 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-22 09:01:05,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:05,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-10-22 09:01:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:05,708 INFO L225 Difference]: With dead ends: 32 [2019-10-22 09:01:05,708 INFO L226 Difference]: Without dead ends: 31 [2019-10-22 09:01:05,709 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-22 09:01:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-22 09:01:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 09:01:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-22 09:01:05,714 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2019-10-22 09:01:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:05,714 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-22 09:01:05,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-22 09:01:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 09:01:05,715 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:05,715 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:05,716 INFO L410 AbstractCegarLoop]: === Iteration 5 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1954337320, now seen corresponding path program 1 times [2019-10-22 09:01:05,716 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:05,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758621510] [2019-10-22 09:01:05,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:05,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758621510] [2019-10-22 09:01:05,754 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:05,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:01:05,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855587612] [2019-10-22 09:01:05,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:05,755 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:05,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:05,756 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-10-22 09:01:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:05,830 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-22 09:01:05,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:05,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-22 09:01:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:05,832 INFO L225 Difference]: With dead ends: 43 [2019-10-22 09:01:05,832 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 09:01:05,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 09:01:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-10-22 09:01:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 09:01:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-22 09:01:05,840 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 13 [2019-10-22 09:01:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:05,840 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-22 09:01:05,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-22 09:01:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 09:01:05,841 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:05,841 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:05,841 INFO L410 AbstractCegarLoop]: === Iteration 6 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash -906050173, now seen corresponding path program 1 times [2019-10-22 09:01:05,842 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:05,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202925910] [2019-10-22 09:01:05,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:05,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:05,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202925910] [2019-10-22 09:01:05,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828006481] [2019-10-22 09:01:05,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:05,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:01:05,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:05,983 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:05,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2019-10-22 09:01:05,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991398498] [2019-10-22 09:01:05,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:05,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:05,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:05,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:05,985 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2019-10-22 09:01:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:06,078 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-10-22 09:01:06,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:06,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-22 09:01:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:06,083 INFO L225 Difference]: With dead ends: 38 [2019-10-22 09:01:06,083 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 09:01:06,083 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 09:01:06,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-10-22 09:01:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:01:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-10-22 09:01:06,088 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2019-10-22 09:01:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:06,088 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-10-22 09:01:06,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-10-22 09:01:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 09:01:06,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:06,089 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:06,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:06,290 INFO L410 AbstractCegarLoop]: === Iteration 7 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash -906049949, now seen corresponding path program 1 times [2019-10-22 09:01:06,290 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:06,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199477725] [2019-10-22 09:01:06,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:06,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:06,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:06,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199477725] [2019-10-22 09:01:06,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133661324] [2019-10-22 09:01:06,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:06,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:01:06,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:06,373 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:06,373 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-10-22 09:01:06,373 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351362987] [2019-10-22 09:01:06,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:06,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:06,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:06,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:06,374 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-10-22 09:01:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:06,532 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2019-10-22 09:01:06,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:01:06,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-10-22 09:01:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:06,536 INFO L225 Difference]: With dead ends: 65 [2019-10-22 09:01:06,536 INFO L226 Difference]: Without dead ends: 64 [2019-10-22 09:01:06,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:01:06,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-22 09:01:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2019-10-22 09:01:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 09:01:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-10-22 09:01:06,547 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 13 [2019-10-22 09:01:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:06,547 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-10-22 09:01:06,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-10-22 09:01:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 09:01:06,548 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:06,548 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:06,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:06,749 INFO L410 AbstractCegarLoop]: === Iteration 8 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:06,750 INFO L82 PathProgramCache]: Analyzing trace with hash 454907873, now seen corresponding path program 1 times [2019-10-22 09:01:06,750 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:06,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561956809] [2019-10-22 09:01:06,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:06,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:06,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:06,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561956809] [2019-10-22 09:01:06,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915398075] [2019-10-22 09:01:06,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:06,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:06,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:06,882 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:06,882 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2019-10-22 09:01:06,882 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166169535] [2019-10-22 09:01:06,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:01:06,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:06,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:01:06,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:06,884 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 10 states. [2019-10-22 09:01:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:07,048 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-10-22 09:01:07,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:01:07,049 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-10-22 09:01:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:07,049 INFO L225 Difference]: With dead ends: 64 [2019-10-22 09:01:07,049 INFO L226 Difference]: Without dead ends: 39 [2019-10-22 09:01:07,050 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:01:07,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-22 09:01:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-10-22 09:01:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 09:01:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-10-22 09:01:07,056 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 14 [2019-10-22 09:01:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:07,056 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-10-22 09:01:07,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:01:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-10-22 09:01:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 09:01:07,057 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:07,057 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:07,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:07,258 INFO L410 AbstractCegarLoop]: === Iteration 9 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:07,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,258 INFO L82 PathProgramCache]: Analyzing trace with hash 454914824, now seen corresponding path program 1 times [2019-10-22 09:01:07,258 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:07,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431505448] [2019-10-22 09:01:07,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:07,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431505448] [2019-10-22 09:01:07,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152684832] [2019-10-22 09:01:07,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:07,358 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:07,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2019-10-22 09:01:07,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892308210] [2019-10-22 09:01:07,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:07,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:07,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:07,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:07,360 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2019-10-22 09:01:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:07,407 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-10-22 09:01:07,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:07,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-10-22 09:01:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:07,408 INFO L225 Difference]: With dead ends: 38 [2019-10-22 09:01:07,409 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 09:01:07,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 09:01:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-22 09:01:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 09:01:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-10-22 09:01:07,413 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2019-10-22 09:01:07,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:07,414 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-10-22 09:01:07,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-10-22 09:01:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 09:01:07,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:07,414 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:07,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:07,615 INFO L410 AbstractCegarLoop]: === Iteration 10 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1977222701, now seen corresponding path program 1 times [2019-10-22 09:01:07,616 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:07,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240157216] [2019-10-22 09:01:07,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:07,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240157216] [2019-10-22 09:01:07,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164478076] [2019-10-22 09:01:07,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:07,683 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:07,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-10-22 09:01:07,683 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070376309] [2019-10-22 09:01:07,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:07,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:07,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:07,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:07,684 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 7 states. [2019-10-22 09:01:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:07,747 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2019-10-22 09:01:07,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:01:07,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-22 09:01:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:07,748 INFO L225 Difference]: With dead ends: 45 [2019-10-22 09:01:07,748 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 09:01:07,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 09:01:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-10-22 09:01:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 09:01:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-10-22 09:01:07,754 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 14 [2019-10-22 09:01:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:07,754 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-10-22 09:01:07,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-10-22 09:01:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:01:07,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:07,755 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2019-10-22 09:01:07,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:07,956 INFO L410 AbstractCegarLoop]: === Iteration 11 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1341115267, now seen corresponding path program 2 times [2019-10-22 09:01:07,957 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:07,957 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19557913] [2019-10-22 09:01:07,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:08,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19557913] [2019-10-22 09:01:08,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860780266] [2019-10-22 09:01:08,022 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:08,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:08,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:08,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:08,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:08,083 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:08,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-10-22 09:01:08,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009572631] [2019-10-22 09:01:08,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:01:08,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:08,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:01:08,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:08,084 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 12 states. [2019-10-22 09:01:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:08,387 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2019-10-22 09:01:08,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-22 09:01:08,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-22 09:01:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:08,389 INFO L225 Difference]: With dead ends: 78 [2019-10-22 09:01:08,389 INFO L226 Difference]: Without dead ends: 77 [2019-10-22 09:01:08,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2019-10-22 09:01:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-22 09:01:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 24. [2019-10-22 09:01:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 09:01:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-22 09:01:08,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2019-10-22 09:01:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:08,400 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-22 09:01:08,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:01:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-22 09:01:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-22 09:01:08,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:08,401 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:08,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:08,605 INFO L410 AbstractCegarLoop]: === Iteration 12 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:08,605 INFO L82 PathProgramCache]: Analyzing trace with hash 451770350, now seen corresponding path program 1 times [2019-10-22 09:01:08,605 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:08,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045857181] [2019-10-22 09:01:08,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:08,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045857181] [2019-10-22 09:01:08,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78799821] [2019-10-22 09:01:08,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:08,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:01:08,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:08,685 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:08,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-10-22 09:01:08,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924410736] [2019-10-22 09:01:08,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:08,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:08,686 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2019-10-22 09:01:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:08,765 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-10-22 09:01:08,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:01:08,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-10-22 09:01:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:08,766 INFO L225 Difference]: With dead ends: 37 [2019-10-22 09:01:08,766 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 09:01:08,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:01:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 09:01:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-10-22 09:01:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 09:01:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-10-22 09:01:08,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2019-10-22 09:01:08,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:08,771 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-10-22 09:01:08,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-10-22 09:01:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-22 09:01:08,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:08,772 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-10-22 09:01:08,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:08,973 INFO L410 AbstractCegarLoop]: === Iteration 13 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:08,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1375099731, now seen corresponding path program 2 times [2019-10-22 09:01:08,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:08,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682893453] [2019-10-22 09:01:08,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682893453] [2019-10-22 09:01:09,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468904381] [2019-10-22 09:01:09,046 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:09,081 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:09,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:09,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:01:09,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,095 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:09,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-10-22 09:01:09,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459608738] [2019-10-22 09:01:09,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:09,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:09,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:09,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:09,097 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2019-10-22 09:01:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:09,193 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-10-22 09:01:09,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:01:09,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-10-22 09:01:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:09,194 INFO L225 Difference]: With dead ends: 43 [2019-10-22 09:01:09,194 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 09:01:09,195 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 09:01:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2019-10-22 09:01:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 09:01:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-10-22 09:01:09,200 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 20 [2019-10-22 09:01:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:09,201 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-10-22 09:01:09,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-10-22 09:01:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-22 09:01:09,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:09,201 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:09,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:09,402 INFO L410 AbstractCegarLoop]: === Iteration 14 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash 511948884, now seen corresponding path program 2 times [2019-10-22 09:01:09,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494246101] [2019-10-22 09:01:09,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494246101] [2019-10-22 09:01:09,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229353452] [2019-10-22 09:01:09,481 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:09,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:09,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:09,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:01:09,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,520 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:09,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-10-22 09:01:09,520 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784640304] [2019-10-22 09:01:09,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:01:09,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:09,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:01:09,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:09,522 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2019-10-22 09:01:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:09,682 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2019-10-22 09:01:09,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:01:09,683 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-10-22 09:01:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:09,684 INFO L225 Difference]: With dead ends: 50 [2019-10-22 09:01:09,684 INFO L226 Difference]: Without dead ends: 49 [2019-10-22 09:01:09,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:01:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-22 09:01:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2019-10-22 09:01:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 09:01:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-10-22 09:01:09,691 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2019-10-22 09:01:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:09,691 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-10-22 09:01:09,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:01:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-10-22 09:01:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-22 09:01:09,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:09,692 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:09,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:09,893 INFO L410 AbstractCegarLoop]: === Iteration 15 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1009095738, now seen corresponding path program 3 times [2019-10-22 09:01:09,893 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570986424] [2019-10-22 09:01:09,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570986424] [2019-10-22 09:01:09,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499650651] [2019-10-22 09:01:09,991 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:10,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 09:01:10,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:10,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:01:10,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,030 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:10,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-10-22 09:01:10,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961217434] [2019-10-22 09:01:10,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:01:10,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:10,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:01:10,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:10,031 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2019-10-22 09:01:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,235 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2019-10-22 09:01:10,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:01:10,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-10-22 09:01:10,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,236 INFO L225 Difference]: With dead ends: 61 [2019-10-22 09:01:10,236 INFO L226 Difference]: Without dead ends: 60 [2019-10-22 09:01:10,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:01:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-22 09:01:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-10-22 09:01:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 09:01:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-10-22 09:01:10,252 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2019-10-22 09:01:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,252 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-10-22 09:01:10,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:01:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-10-22 09:01:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-22 09:01:10,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:10,253 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-10-22 09:01:10,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:10,454 INFO L410 AbstractCegarLoop]: === Iteration 16 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:10,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1872988191, now seen corresponding path program 3 times [2019-10-22 09:01:10,455 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:10,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402005746] [2019-10-22 09:01:10,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402005746] [2019-10-22 09:01:10,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120537566] [2019-10-22 09:01:10,564 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:10,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 09:01:10,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:10,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:01:10,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,611 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:10,611 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-10-22 09:01:10,611 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412484721] [2019-10-22 09:01:10,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:01:10,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:10,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:01:10,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:10,612 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2019-10-22 09:01:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,726 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2019-10-22 09:01:10,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:01:10,726 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-10-22 09:01:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,727 INFO L225 Difference]: With dead ends: 67 [2019-10-22 09:01:10,727 INFO L226 Difference]: Without dead ends: 66 [2019-10-22 09:01:10,728 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:01:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-22 09:01:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2019-10-22 09:01:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 09:01:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-10-22 09:01:10,740 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 32 [2019-10-22 09:01:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,740 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-10-22 09:01:10,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:01:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-10-22 09:01:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-22 09:01:10,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:10,741 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:10,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:10,942 INFO L410 AbstractCegarLoop]: === Iteration 17 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1485859744, now seen corresponding path program 4 times [2019-10-22 09:01:10,942 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:10,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229885548] [2019-10-22 09:01:10,942 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,942 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:11,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229885548] [2019-10-22 09:01:11,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894180192] [2019-10-22 09:01:11,064 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:11,102 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:11,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:11,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 09:01:11,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-22 09:01:11,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:11,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 15 [2019-10-22 09:01:11,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594610732] [2019-10-22 09:01:11,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 09:01:11,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 09:01:11,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:01:11,148 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2019-10-22 09:01:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:11,386 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2019-10-22 09:01:11,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 09:01:11,386 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2019-10-22 09:01:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:11,387 INFO L225 Difference]: With dead ends: 73 [2019-10-22 09:01:11,387 INFO L226 Difference]: Without dead ends: 72 [2019-10-22 09:01:11,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2019-10-22 09:01:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-22 09:01:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2019-10-22 09:01:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-22 09:01:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-10-22 09:01:11,394 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 38 [2019-10-22 09:01:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:11,394 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-10-22 09:01:11,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 09:01:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-10-22 09:01:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-22 09:01:11,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:11,396 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:11,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:11,596 INFO L410 AbstractCegarLoop]: === Iteration 18 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:11,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1828298374, now seen corresponding path program 5 times [2019-10-22 09:01:11,597 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:11,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449542681] [2019-10-22 09:01:11,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:11,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449542681] [2019-10-22 09:01:11,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066354298] [2019-10-22 09:01:11,746 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:11,782 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-22 09:01:11,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:11,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 09:01:11,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:11,795 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:11,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2019-10-22 09:01:11,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895700013] [2019-10-22 09:01:11,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 09:01:11,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:11,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 09:01:11,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:11,796 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2019-10-22 09:01:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:12,125 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2019-10-22 09:01:12,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 09:01:12,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2019-10-22 09:01:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:12,128 INFO L225 Difference]: With dead ends: 92 [2019-10-22 09:01:12,128 INFO L226 Difference]: Without dead ends: 91 [2019-10-22 09:01:12,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 09:01:12,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-22 09:01:12,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2019-10-22 09:01:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-22 09:01:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-10-22 09:01:12,140 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 44 [2019-10-22 09:01:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:12,141 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-10-22 09:01:12,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 09:01:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-10-22 09:01:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-22 09:01:12,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:12,143 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1] [2019-10-22 09:01:12,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:12,347 INFO L410 AbstractCegarLoop]: === Iteration 19 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:12,347 INFO L82 PathProgramCache]: Analyzing trace with hash 123200235, now seen corresponding path program 4 times [2019-10-22 09:01:12,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:12,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804775548] [2019-10-22 09:01:12,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:12,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804775548] [2019-10-22 09:01:12,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151880378] [2019-10-22 09:01:12,481 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:12,522 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:12,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:12,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-22 09:01:12,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-22 09:01:12,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:12,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2019-10-22 09:01:12,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313309368] [2019-10-22 09:01:12,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 09:01:12,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:12,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 09:01:12,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:01:12,628 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 22 states. [2019-10-22 09:01:12,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:12,817 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2019-10-22 09:01:12,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 09:01:12,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2019-10-22 09:01:12,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:12,818 INFO L225 Difference]: With dead ends: 96 [2019-10-22 09:01:12,818 INFO L226 Difference]: Without dead ends: 57 [2019-10-22 09:01:12,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2019-10-22 09:01:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-22 09:01:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-22 09:01:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-22 09:01:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-10-22 09:01:12,828 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 44 [2019-10-22 09:01:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:12,829 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-10-22 09:01:12,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 09:01:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-10-22 09:01:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-22 09:01:12,831 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:12,831 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:13,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:13,032 INFO L410 AbstractCegarLoop]: === Iteration 20 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:13,032 INFO L82 PathProgramCache]: Analyzing trace with hash -319514926, now seen corresponding path program 6 times [2019-10-22 09:01:13,032 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:13,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891284033] [2019-10-22 09:01:13,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891284033] [2019-10-22 09:01:13,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311634271] [2019-10-22 09:01:13,229 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:13,263 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-22 09:01:13,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:13,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 09:01:13,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,278 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:13,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2019-10-22 09:01:13,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364143080] [2019-10-22 09:01:13,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 09:01:13,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:13,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 09:01:13,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:01:13,280 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 21 states. [2019-10-22 09:01:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:13,569 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-10-22 09:01:13,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 09:01:13,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2019-10-22 09:01:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:13,570 INFO L225 Difference]: With dead ends: 71 [2019-10-22 09:01:13,570 INFO L226 Difference]: Without dead ends: 70 [2019-10-22 09:01:13,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2019-10-22 09:01:13,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-22 09:01:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-10-22 09:01:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-22 09:01:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-10-22 09:01:13,578 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 56 [2019-10-22 09:01:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:13,579 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-10-22 09:01:13,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 09:01:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-10-22 09:01:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-22 09:01:13,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:13,580 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:13,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:13,780 INFO L410 AbstractCegarLoop]: === Iteration 21 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:13,780 INFO L82 PathProgramCache]: Analyzing trace with hash 52526366, now seen corresponding path program 7 times [2019-10-22 09:01:13,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:13,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370339577] [2019-10-22 09:01:13,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370339577] [2019-10-22 09:01:13,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993835425] [2019-10-22 09:01:13,992 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/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 09:01:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:14,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 09:01:14,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:14,047 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:14,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2019-10-22 09:01:14,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950944207] [2019-10-22 09:01:14,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 09:01:14,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 09:01:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:01:14,048 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 25 states. [2019-10-22 09:01:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:14,454 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-10-22 09:01:14,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 09:01:14,454 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 68 [2019-10-22 09:01:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:14,455 INFO L225 Difference]: With dead ends: 83 [2019-10-22 09:01:14,455 INFO L226 Difference]: Without dead ends: 82 [2019-10-22 09:01:14,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=1611, Unknown=0, NotChecked=0, Total=2070 [2019-10-22 09:01:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-22 09:01:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-10-22 09:01:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-22 09:01:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-10-22 09:01:14,464 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 68 [2019-10-22 09:01:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:14,464 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-10-22 09:01:14,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 09:01:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-10-22 09:01:14,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-22 09:01:14,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:14,465 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:14,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:14,665 INFO L410 AbstractCegarLoop]: === Iteration 22 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:14,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:14,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1106554518, now seen corresponding path program 8 times [2019-10-22 09:01:14,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:14,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958619850] [2019-10-22 09:01:14,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:14,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958619850] [2019-10-22 09:01:14,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251381480] [2019-10-22 09:01:14,969 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:15,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:15,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:15,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-22 09:01:15,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:15,035 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:15,035 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2019-10-22 09:01:15,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746792874] [2019-10-22 09:01:15,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-22 09:01:15,036 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:15,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-22 09:01:15,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2019-10-22 09:01:15,037 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 29 states. [2019-10-22 09:01:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:15,479 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-10-22 09:01:15,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-22 09:01:15,480 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2019-10-22 09:01:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:15,481 INFO L225 Difference]: With dead ends: 95 [2019-10-22 09:01:15,481 INFO L226 Difference]: Without dead ends: 94 [2019-10-22 09:01:15,481 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=2230, Unknown=0, NotChecked=0, Total=2862 [2019-10-22 09:01:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-22 09:01:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-22 09:01:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-22 09:01:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-10-22 09:01:15,491 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 80 [2019-10-22 09:01:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:15,491 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-10-22 09:01:15,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-22 09:01:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-10-22 09:01:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-22 09:01:15,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:15,492 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:15,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:15,693 INFO L410 AbstractCegarLoop]: === Iteration 23 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1279454282, now seen corresponding path program 9 times [2019-10-22 09:01:15,693 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:15,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067413658] [2019-10-22 09:01:15,693 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:15,693 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:15,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:16,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067413658] [2019-10-22 09:01:16,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680944279] [2019-10-22 09:01:16,098 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:16,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-22 09:01:16,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:16,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-22 09:01:16,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:01:16,241 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:16,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 35 [2019-10-22 09:01:16,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624114333] [2019-10-22 09:01:16,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-22 09:01:16,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-22 09:01:16,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 09:01:16,244 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 36 states. [2019-10-22 09:01:16,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:16,892 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2019-10-22 09:01:16,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-22 09:01:16,892 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 92 [2019-10-22 09:01:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:16,893 INFO L225 Difference]: With dead ends: 119 [2019-10-22 09:01:16,893 INFO L226 Difference]: Without dead ends: 118 [2019-10-22 09:01:16,894 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1140, Invalid=3830, Unknown=0, NotChecked=0, Total=4970 [2019-10-22 09:01:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-22 09:01:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-10-22 09:01:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-22 09:01:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2019-10-22 09:01:16,905 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 92 [2019-10-22 09:01:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:16,905 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2019-10-22 09:01:16,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-22 09:01:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2019-10-22 09:01:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-22 09:01:16,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:16,906 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:17,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:17,107 INFO L410 AbstractCegarLoop]: === Iteration 24 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:01:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:17,107 INFO L82 PathProgramCache]: Analyzing trace with hash -853253554, now seen corresponding path program 10 times [2019-10-22 09:01:17,107 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:17,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301562324] [2019-10-22 09:01:17,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 0 proven. 955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301562324] [2019-10-22 09:01:17,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484840483] [2019-10-22 09:01:17,641 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:17,703 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:17,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:17,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 61 conjunts are in the unsatisfiable core [2019-10-22 09:01:17,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 10 proven. 682 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-10-22 09:01:18,040 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:18,040 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 51 [2019-10-22 09:01:18,040 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366432287] [2019-10-22 09:01:18,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-10-22 09:01:18,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:18,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-10-22 09:01:18,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2221, Unknown=0, NotChecked=0, Total=2652 [2019-10-22 09:01:18,043 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 52 states. [2019-10-22 09:01:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:18,240 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-10-22 09:01:18,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:01:18,251 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 116 [2019-10-22 09:01:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:18,252 INFO L225 Difference]: With dead ends: 117 [2019-10-22 09:01:18,252 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 09:01:18,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2019-10-22 09:01:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 09:01:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 09:01:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 09:01:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 09:01:18,254 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2019-10-22 09:01:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:18,254 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:01:18,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-10-22 09:01:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:01:18,254 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 09:01:18,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:18,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 09:01:19,054 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2019-10-22 09:01:19,241 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2019-10-22 09:01:19,400 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 97 [2019-10-22 09:01:19,502 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2019-10-22 09:01:19,603 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2019-10-22 09:01:19,810 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2019-10-22 09:01:19,940 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 110 [2019-10-22 09:01:20,043 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 84 [2019-10-22 09:01:20,190 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2019-10-22 09:01:20,325 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 104 [2019-10-22 09:01:20,623 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 91 [2019-10-22 09:01:20,733 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 113 [2019-10-22 09:01:21,780 WARN L191 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 33 [2019-10-22 09:01:22,241 WARN L191 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 1 [2019-10-22 09:01:24,506 WARN L191 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 520 DAG size of output: 41 [2019-10-22 09:01:24,508 INFO L443 ceAbstractionStarter]: For program point fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2019-10-22 09:01:24,508 INFO L443 ceAbstractionStarter]: For program point fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2019-10-22 09:01:24,508 INFO L443 ceAbstractionStarter]: For program point fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2019-10-22 09:01:24,508 INFO L443 ceAbstractionStarter]: For program point fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2019-10-22 09:01:24,508 INFO L443 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-10-22 09:01:24,508 INFO L443 ceAbstractionStarter]: For program point fFINAL(lines 13 23) no Hoare annotation was computed. [2019-10-22 09:01:24,508 INFO L443 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-10-22 09:01:24,508 INFO L443 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2019-10-22 09:01:24,509 INFO L439 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (not (<= |f_#in~x| 2147483647)))) (and (or .cse0 (not (<= |f_#in~y| |f_#in~x|)) (not (<= |f_#in~x| (+ |f_#in~y| 1))) (not (<= 1 |f_#in~x|)) (and (<= f_~y f_~x) (<= f_~x (+ f_~y 1)))) (or (not (<= 0 |f_#in~y|)) (and (and (and (and (not (= 0 f_~y)) (<= f_~x 2147483647) (<= f_~y 2147483647)) (<= 0 f_~x)) (<= 0 f_~y)) (not (= 0 f_~x))) (not (<= |f_#in~y| 2147483647)) (not (<= 0 |f_#in~x|)) .cse0))) [2019-10-22 09:01:24,509 INFO L443 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2019-10-22 09:01:24,509 INFO L443 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2019-10-22 09:01:24,509 INFO L443 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2019-10-22 09:01:24,509 INFO L439 ceAbstractionStarter]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse2 (not (<= 0 |f_#in~y|))) (.cse0 (not (<= |f_#in~y| 2147483647))) (.cse1 (not (<= |f_#in~x| 2147483647)))) (and (or (or (or .cse0 .cse1) .cse2) (not (<= 1 |f_#in~x|))) (or .cse2 .cse0 (not (<= 0 |f_#in~x|)) (and (not (= 0 f_~y)) (and (<= 0 f_~x) (<= f_~y 2147483647)) (<= f_~x (+ f_~y 1)) (<= f_~x 2147483646) (<= 0 f_~y)) .cse1))) [2019-10-22 09:01:24,509 INFO L443 ceAbstractionStarter]: For program point L18-3(line 18) no Hoare annotation was computed. [2019-10-22 09:01:24,509 INFO L443 ceAbstractionStarter]: For program point L14(lines 14 22) no Hoare annotation was computed. [2019-10-22 09:01:24,509 INFO L443 ceAbstractionStarter]: For program point fEXIT(lines 13 23) no Hoare annotation was computed. [2019-10-22 09:01:24,509 INFO L446 ceAbstractionStarter]: At program point fENTRY(lines 13 23) the Hoare annotation is: true [2019-10-22 09:01:24,509 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 09:01:24,510 INFO L439 ceAbstractionStarter]: At program point L31(lines 25 32) the Hoare annotation is: (<= ULTIMATE.start_main_~y~0 2147483647) [2019-10-22 09:01:24,510 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 09:01:24,510 INFO L439 ceAbstractionStarter]: At program point L29(line 29) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= ULTIMATE.start_main_~y~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0) (<= 0 ULTIMATE.start_main_~y~0)) [2019-10-22 09:01:24,510 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 09:01:24,510 INFO L443 ceAbstractionStarter]: For program point L28(lines 28 30) no Hoare annotation was computed. [2019-10-22 09:01:24,510 INFO L443 ceAbstractionStarter]: For program point L29-1(line 29) no Hoare annotation was computed. [2019-10-22 09:01:24,510 INFO L443 ceAbstractionStarter]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2019-10-22 09:01:24,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:24 BoogieIcfgContainer [2019-10-22 09:01:24,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:24,522 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:24,522 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:24,522 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:24,522 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:04" (3/4) ... [2019-10-22 09:01:24,526 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 09:01:24,530 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2019-10-22 09:01:24,535 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 09:01:24,535 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-10-22 09:01:24,566 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0864997d-86f7-4773-b794-28c1d803673f/bin/uautomizer/witness.graphml [2019-10-22 09:01:24,566 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:24,568 INFO L168 Benchmark]: Toolchain (without parser) took 20148.03 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 314.6 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -185.8 MB). Peak memory consumption was 128.8 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:24,569 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:24,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -201.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:24,570 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.12 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 09:01:24,570 INFO L168 Benchmark]: Boogie Preprocessor took 14.57 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:24,570 INFO L168 Benchmark]: RCFGBuilder took 193.67 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:24,571 INFO L168 Benchmark]: TraceAbstraction took 19545.91 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 165.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -16.0 MB). Peak memory consumption was 403.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:24,571 INFO L168 Benchmark]: Witness Printer took 44.28 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:24,574 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 321.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -201.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.12 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 14.57 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 193.67 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19545.91 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 165.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -16.0 MB). Peak memory consumption was 403.0 MB. Max. memory is 11.5 GB. * Witness Printer took 44.28 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: y <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 4 error locations. Result: SAFE, OverallTime: 19.4s, OverallIterations: 24, TraceHistogramMax: 19, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.0s, HoareTripleCheckerStatistics: 286 SDtfs, 1294 SDslu, 1208 SDs, 0 SdLazy, 2569 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1258 GetRequests, 729 SyntacticMatches, 5 SemanticMatches, 524 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=23, 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, 24 MinimizatonAttempts, 261 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 89 PreInvPairs, 89 NumberOfFragments, 147 HoareAnnotationTreeSize, 89 FomulaSimplifications, 33086100 FormulaSimplificationTreeSizeReduction, 2.8s HoareSimplificationTime, 5 FomulaSimplificationsInter, 5999921 FormulaSimplificationTreeSizeReductionInter, 3.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 1553 NumberOfCodeBlocks, 1553 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 1510 ConstructedInterpolants, 0 QuantifiedInterpolants, 424429 SizeOfPredicates, 121 NumberOfNonLiveVariables, 1919 ConjunctsInSsa, 300 ConjunctsInUnsatCore, 43 InterpolantComputations, 7 PerfectInterpolantSequences, 364/5819 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 correct! Received shutdown request...