./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de331d1f778f147a4d32c0286c0018cb5b5cf61f2b6c0952b6bed68b0f715eaf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:45:15,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:45:15,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:45:15,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:45:15,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:45:15,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:45:15,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:45:15,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:45:15,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:45:15,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:45:15,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:45:15,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:45:15,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:45:15,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:45:15,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:45:15,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:45:15,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:45:15,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:45:15,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:45:15,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:45:15,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:45:15,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:45:15,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:45:15,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:45:15,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:45:15,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:45:15,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:45:15,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:45:15,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:45:15,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:45:15,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:45:15,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:45:15,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:45:15,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:45:15,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:45:15,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:45:15,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:45:15,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:45:15,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:45:15,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:45:15,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:45:15,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-21 01:45:15,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:45:15,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:45:15,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:45:15,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:45:15,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:45:15,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:45:15,329 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:45:15,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:45:15,329 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:45:15,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:45:15,331 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:45:15,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:45:15,331 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:45:15,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:45:15,332 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:45:15,332 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:45:15,332 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:45:15,332 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:45:15,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:45:15,333 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:45:15,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:45:15,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:45:15,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:45:15,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:45:15,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:45:15,335 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 01:45:15,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:45:15,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:45:15,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:45:15,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:45:15,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:45:15,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:45:15,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:45:15,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:45:15,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:45:15,338 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:45:15,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:45:15,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:45:15,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:45:15,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:45:15,339 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de331d1f778f147a4d32c0286c0018cb5b5cf61f2b6c0952b6bed68b0f715eaf [2021-11-21 01:45:15,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:45:15,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:45:15,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:45:15,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:45:15,688 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:45:15,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c [2021-11-21 01:45:15,766 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/data/f2ea759af/745546479bb3450a9c24c77de3c1d91f/FLAGf2ea6a286 [2021-11-21 01:45:16,270 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:45:16,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c [2021-11-21 01:45:16,290 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/data/f2ea759af/745546479bb3450a9c24c77de3c1d91f/FLAGf2ea6a286 [2021-11-21 01:45:16,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/data/f2ea759af/745546479bb3450a9c24c77de3c1d91f [2021-11-21 01:45:16,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:45:16,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:45:16,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:45:16,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:45:16,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:45:16,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@207c52f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16, skipping insertion in model container [2021-11-21 01:45:16,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:45:16,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:45:16,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:45:16,859 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:45:16,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:45:16,895 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:45:16,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16 WrapperNode [2021-11-21 01:45:16,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:45:16,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:45:16,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:45:16,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:45:16,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,923 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 8 [2021-11-21 01:45:16,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:45:16,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:45:16,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:45:16,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:45:16,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:45:16,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:45:16,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:45:16,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:45:16,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (1/1) ... [2021-11-21 01:45:16,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:45:16,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:16,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:45:16,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:45:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-21 01:45:17,012 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-21 01:45:17,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:45:17,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:45:17,072 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:45:17,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:45:17,191 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:45:17,207 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:45:17,208 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:45:17,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:45:17 BoogieIcfgContainer [2021-11-21 01:45:17,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:45:17,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:45:17,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:45:17,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:45:17,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:45:16" (1/3) ... [2021-11-21 01:45:17,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9e9457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:45:17, skipping insertion in model container [2021-11-21 01:45:17,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:45:16" (2/3) ... [2021-11-21 01:45:17,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9e9457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:45:17, skipping insertion in model container [2021-11-21 01:45:17,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:45:17" (3/3) ... [2021-11-21 01:45:17,219 INFO L111 eAbstractionObserver]: Analyzing ICFG HarrisLalNoriRajamani-SAS2010-Fig1.c [2021-11-21 01:45:17,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:45:17,224 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-21 01:45:17,271 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:45:17,278 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:45:17,279 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-21 01:45:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:45:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:45:17,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:17,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:17,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash 247949617, now seen corresponding path program 1 times [2021-11-21 01:45:17,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:17,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979132921] [2021-11-21 01:45:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:17,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:17,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:17,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979132921] [2021-11-21 01:45:17,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979132921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:17,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:17,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:45:17,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774852482] [2021-11-21 01:45:17,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:17,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:45:17,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:17,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:45:17,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:45:17,493 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:17,550 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-11-21 01:45:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:45:17,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:45:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:17,561 INFO L225 Difference]: With dead ends: 48 [2021-11-21 01:45:17,561 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 01:45:17,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:45:17,568 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:17,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 01:45:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-11-21 01:45:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.72) internal successors, (43), 33 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-11-21 01:45:17,603 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 7 [2021-11-21 01:45:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:17,604 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-11-21 01:45:17,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-11-21 01:45:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:45:17,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:17,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:17,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:45:17,606 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash -903496418, now seen corresponding path program 1 times [2021-11-21 01:45:17,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745569566] [2021-11-21 01:45:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:17,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:17,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745569566] [2021-11-21 01:45:17,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745569566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:17,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:17,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:45:17,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202245110] [2021-11-21 01:45:17,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:17,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:45:17,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:17,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:45:17,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:45:17,641 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:17,668 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-11-21 01:45:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:45:17,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:45:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:17,671 INFO L225 Difference]: With dead ends: 56 [2021-11-21 01:45:17,671 INFO L226 Difference]: Without dead ends: 54 [2021-11-21 01:45:17,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:45:17,673 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:17,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 33 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-21 01:45:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-11-21 01:45:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 48 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 71 transitions. [2021-11-21 01:45:17,685 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 71 transitions. Word has length 8 [2021-11-21 01:45:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:17,685 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 71 transitions. [2021-11-21 01:45:17,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 71 transitions. [2021-11-21 01:45:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:45:17,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:17,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:17,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:45:17,687 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2058153125, now seen corresponding path program 1 times [2021-11-21 01:45:17,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:17,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792228113] [2021-11-21 01:45:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:17,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:17,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792228113] [2021-11-21 01:45:17,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792228113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:17,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:17,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:45:17,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505499682] [2021-11-21 01:45:17,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:17,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:45:17,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:17,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:45:17,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:45:17,756 INFO L87 Difference]: Start difference. First operand 50 states and 71 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:17,803 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2021-11-21 01:45:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:45:17,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:45:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:17,806 INFO L225 Difference]: With dead ends: 65 [2021-11-21 01:45:17,806 INFO L226 Difference]: Without dead ends: 64 [2021-11-21 01:45:17,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:17,809 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:17,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-21 01:45:17,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-11-21 01:45:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 54 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2021-11-21 01:45:17,821 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 9 [2021-11-21 01:45:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:17,821 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2021-11-21 01:45:17,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2021-11-21 01:45:17,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:45:17,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:17,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:17,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:45:17,824 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2058152774, now seen corresponding path program 1 times [2021-11-21 01:45:17,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:17,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775134517] [2021-11-21 01:45:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:17,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:17,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:17,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775134517] [2021-11-21 01:45:17,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775134517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:17,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:17,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:45:17,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887474113] [2021-11-21 01:45:17,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:17,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:45:17,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:45:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:45:17,870 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:17,909 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2021-11-21 01:45:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:45:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:45:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:17,911 INFO L225 Difference]: With dead ends: 59 [2021-11-21 01:45:17,911 INFO L226 Difference]: Without dead ends: 58 [2021-11-21 01:45:17,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:17,914 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:17,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 28 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-21 01:45:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-11-21 01:45:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 54 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 77 transitions. [2021-11-21 01:45:17,924 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 77 transitions. Word has length 9 [2021-11-21 01:45:17,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:17,924 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 77 transitions. [2021-11-21 01:45:17,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 77 transitions. [2021-11-21 01:45:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:45:17,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:17,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:17,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:45:17,927 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash -621762489, now seen corresponding path program 1 times [2021-11-21 01:45:17,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:17,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827496380] [2021-11-21 01:45:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:17,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:17,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:17,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827496380] [2021-11-21 01:45:17,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827496380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:17,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:17,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:45:17,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975845101] [2021-11-21 01:45:17,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:17,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:17,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:17,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:17,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:17,973 INFO L87 Difference]: Start difference. First operand 56 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:18,032 INFO L93 Difference]: Finished difference Result 108 states and 149 transitions. [2021-11-21 01:45:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:18,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:45:18,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:18,035 INFO L225 Difference]: With dead ends: 108 [2021-11-21 01:45:18,035 INFO L226 Difference]: Without dead ends: 107 [2021-11-21 01:45:18,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:18,038 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:18,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 70 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-21 01:45:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-11-21 01:45:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 98 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2021-11-21 01:45:18,053 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 10 [2021-11-21 01:45:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:18,054 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2021-11-21 01:45:18,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2021-11-21 01:45:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:45:18,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:18,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:18,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:45:18,056 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash -621773380, now seen corresponding path program 1 times [2021-11-21 01:45:18,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:18,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125594642] [2021-11-21 01:45:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:18,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:18,114 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:18,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125594642] [2021-11-21 01:45:18,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125594642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:18,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:18,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:45:18,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453708261] [2021-11-21 01:45:18,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:18,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:18,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:18,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:18,117 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:18,192 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-11-21 01:45:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:18,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:45:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:18,199 INFO L225 Difference]: With dead ends: 109 [2021-11-21 01:45:18,200 INFO L226 Difference]: Without dead ends: 108 [2021-11-21 01:45:18,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:18,202 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:18,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 71 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-21 01:45:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-11-21 01:45:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.5108695652173914) internal successors, (139), 98 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 141 transitions. [2021-11-21 01:45:18,230 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 141 transitions. Word has length 10 [2021-11-21 01:45:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:18,231 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 141 transitions. [2021-11-21 01:45:18,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 141 transitions. [2021-11-21 01:45:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:45:18,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:18,233 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:18,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:45:18,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash -676662528, now seen corresponding path program 1 times [2021-11-21 01:45:18,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:18,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896621529] [2021-11-21 01:45:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:18,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:18,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:18,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896621529] [2021-11-21 01:45:18,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896621529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:18,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066106673] [2021-11-21 01:45:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:18,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:18,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:18,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:18,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:45:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:18,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:45:18,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:18,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:18,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066106673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:18,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130791627] [2021-11-21 01:45:18,540 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:45:18,540 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:18,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:18,550 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:18,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:18,592 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:45:19,145 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:19,388 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:19,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:19,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-21 01:45:19,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827417378] [2021-11-21 01:45:19,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:19,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:19,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:19,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:45:19,405 INFO L87 Difference]: Start difference. First operand 101 states and 141 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:19,483 INFO L93 Difference]: Finished difference Result 250 states and 351 transitions. [2021-11-21 01:45:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:19,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:45:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:19,487 INFO L225 Difference]: With dead ends: 250 [2021-11-21 01:45:19,488 INFO L226 Difference]: Without dead ends: 248 [2021-11-21 01:45:19,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:45:19,497 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 84 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:19,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 71 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-21 01:45:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 119. [2021-11-21 01:45:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.481818181818182) internal successors, (163), 116 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2021-11-21 01:45:19,532 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 10 [2021-11-21 01:45:19,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:19,532 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2021-11-21 01:45:19,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2021-11-21 01:45:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:45:19,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:19,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:19,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:19,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:19,752 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1736462088, now seen corresponding path program 1 times [2021-11-21 01:45:19,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:19,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017520420] [2021-11-21 01:45:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:19,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:19,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:19,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017520420] [2021-11-21 01:45:19,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017520420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:19,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:19,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:45:19,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958513587] [2021-11-21 01:45:19,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:19,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:19,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:19,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:19,800 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:19,839 INFO L93 Difference]: Finished difference Result 119 states and 165 transitions. [2021-11-21 01:45:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:45:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:19,841 INFO L225 Difference]: With dead ends: 119 [2021-11-21 01:45:19,841 INFO L226 Difference]: Without dead ends: 118 [2021-11-21 01:45:19,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:19,847 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:19,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-21 01:45:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-21 01:45:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 115 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2021-11-21 01:45:19,861 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 10 [2021-11-21 01:45:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:19,862 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2021-11-21 01:45:19,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2021-11-21 01:45:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:45:19,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:19,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:19,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:45:19,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1736451197, now seen corresponding path program 1 times [2021-11-21 01:45:19,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357418354] [2021-11-21 01:45:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:19,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:19,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357418354] [2021-11-21 01:45:19,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357418354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:19,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:19,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:45:19,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876790013] [2021-11-21 01:45:19,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:19,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:19,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:19,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:45:19,923 INFO L87 Difference]: Start difference. First operand 118 states and 161 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:19,961 INFO L93 Difference]: Finished difference Result 122 states and 165 transitions. [2021-11-21 01:45:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:19,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:45:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:19,962 INFO L225 Difference]: With dead ends: 122 [2021-11-21 01:45:19,962 INFO L226 Difference]: Without dead ends: 121 [2021-11-21 01:45:19,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:45:19,964 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:19,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-21 01:45:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2021-11-21 01:45:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 61 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-11-21 01:45:19,969 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 10 [2021-11-21 01:45:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:19,969 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-11-21 01:45:19,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-11-21 01:45:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:45:19,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:19,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:19,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:45:19,971 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1267695893, now seen corresponding path program 1 times [2021-11-21 01:45:19,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:19,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935559340] [2021-11-21 01:45:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:19,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:20,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:20,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935559340] [2021-11-21 01:45:20,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935559340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:20,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763706406] [2021-11-21 01:45:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:20,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:20,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:20,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:20,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:45:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:20,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:45:20,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:20,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:20,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763706406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:20,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:20,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-21 01:45:20,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470552274] [2021-11-21 01:45:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:20,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:20,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:20,134 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:20,172 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-11-21 01:45:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:20,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:45:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:20,174 INFO L225 Difference]: With dead ends: 82 [2021-11-21 01:45:20,174 INFO L226 Difference]: Without dead ends: 81 [2021-11-21 01:45:20,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:45:20,175 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:20,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-21 01:45:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2021-11-21 01:45:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.34) internal successors, (67), 54 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-11-21 01:45:20,179 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 13 [2021-11-21 01:45:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:20,180 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-11-21 01:45:20,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-11-21 01:45:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:45:20,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:20,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:20,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:20,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:45:20,408 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash 226732383, now seen corresponding path program 1 times [2021-11-21 01:45:20,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:20,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760079143] [2021-11-21 01:45:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:20,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:20,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:20,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760079143] [2021-11-21 01:45:20,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760079143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877092615] [2021-11-21 01:45:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:20,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:20,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:20,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:45:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:45:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:20,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:45:20,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877092615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:20,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:45:20,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-21 01:45:20,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923919317] [2021-11-21 01:45:20,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:20,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:45:20,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:45:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:45:20,585 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:20,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:20,628 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2021-11-21 01:45:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:20,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 01:45:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:20,629 INFO L225 Difference]: With dead ends: 56 [2021-11-21 01:45:20,629 INFO L226 Difference]: Without dead ends: 55 [2021-11-21 01:45:20,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:45:20,630 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:20,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:20,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-21 01:45:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-21 01:45:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.3) internal successors, (65), 53 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-21 01:45:20,634 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 15 [2021-11-21 01:45:20,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:20,635 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-21 01:45:20,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-21 01:45:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:45:20,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:20,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:20,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:20,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:45:20,860 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:20,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:20,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1399069051, now seen corresponding path program 1 times [2021-11-21 01:45:20,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:20,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310009979] [2021-11-21 01:45:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:20,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:20,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:20,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310009979] [2021-11-21 01:45:20,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310009979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:20,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262874972] [2021-11-21 01:45:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:20,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:20,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:20,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:20,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:45:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:20,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:45:20,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:20,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:21,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262874972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:21,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [891262253] [2021-11-21 01:45:21,053 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:45:21,054 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:21,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:21,054 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:21,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:21,066 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:45:22,053 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:22,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:22,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:22,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-21 01:45:22,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144178727] [2021-11-21 01:45:22,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:22,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:22,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:45:22,522 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:22,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:22,563 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2021-11-21 01:45:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:45:22,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:45:22,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:22,565 INFO L225 Difference]: With dead ends: 104 [2021-11-21 01:45:22,565 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 01:45:22,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:45:22,566 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:22,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 54 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:22,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 01:45:22,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-21 01:45:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 101 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:22,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2021-11-21 01:45:22,570 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 18 [2021-11-21 01:45:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:22,570 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2021-11-21 01:45:22,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2021-11-21 01:45:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:45:22,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:22,571 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:22,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:22,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:45:22,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash 678995057, now seen corresponding path program 2 times [2021-11-21 01:45:22,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:22,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986745034] [2021-11-21 01:45:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:22,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:45:22,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:22,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986745034] [2021-11-21 01:45:22,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986745034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:22,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406004028] [2021-11-21 01:45:22,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:45:22,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:22,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:22,827 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:22,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:45:22,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 01:45:22,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:45:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:45:22,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:45:22,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406004028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:22,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650370024] [2021-11-21 01:45:22,966 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:45:22,966 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:22,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:22,967 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:22,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:22,981 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:45:23,418 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:23,625 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:23,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:23,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-21 01:45:23,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123054233] [2021-11-21 01:45:23,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:23,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:45:23,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:45:23,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:45:23,627 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:23,655 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2021-11-21 01:45:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:45:23,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 01:45:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:23,656 INFO L225 Difference]: With dead ends: 143 [2021-11-21 01:45:23,656 INFO L226 Difference]: Without dead ends: 142 [2021-11-21 01:45:23,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:45:23,657 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:23,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-21 01:45:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 101. [2021-11-21 01:45:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 99 states have internal predecessors, (120), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2021-11-21 01:45:23,661 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 19 [2021-11-21 01:45:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:23,661 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2021-11-21 01:45:23,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2021-11-21 01:45:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:45:23,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:23,663 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:23,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:45:23,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:45:23,881 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1623141048, now seen corresponding path program 1 times [2021-11-21 01:45:23,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:23,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208839459] [2021-11-21 01:45:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:23,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:45:23,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:23,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208839459] [2021-11-21 01:45:23,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208839459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:45:23,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:45:23,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:45:23,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444270512] [2021-11-21 01:45:23,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:45:23,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:45:23,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:45:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:45:23,908 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:23,923 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2021-11-21 01:45:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:45:23,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 01:45:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:23,924 INFO L225 Difference]: With dead ends: 141 [2021-11-21 01:45:23,925 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 01:45:23,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:45:23,926 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:23,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 01:45:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 50. [2021-11-21 01:45:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-21 01:45:23,929 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 23 [2021-11-21 01:45:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:23,929 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-21 01:45:23,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-21 01:45:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:45:23,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:23,931 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:23,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:45:23,931 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1249271002, now seen corresponding path program 2 times [2021-11-21 01:45:23,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876242176] [2021-11-21 01:45:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:23,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:23,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:23,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876242176] [2021-11-21 01:45:23,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876242176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:23,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036089055] [2021-11-21 01:45:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:45:23,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:23,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:23,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:23,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:45:24,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:45:24,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:24,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:45:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:24,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:24,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036089055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:24,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1265740189] [2021-11-21 01:45:24,242 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:45:24,242 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:24,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:24,243 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:24,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:24,255 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:45:25,089 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:25,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:25,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:25,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-21 01:45:25,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519977703] [2021-11-21 01:45:25,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:25,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:45:25,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:25,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:45:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:45:25,461 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 12 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:25,508 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-11-21 01:45:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:45:25,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 12 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-21 01:45:25,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:25,510 INFO L225 Difference]: With dead ends: 99 [2021-11-21 01:45:25,511 INFO L226 Difference]: Without dead ends: 98 [2021-11-21 01:45:25,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:45:25,514 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:25,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 100 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:45:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-21 01:45:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-21 01:45:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2021-11-21 01:45:25,518 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 36 [2021-11-21 01:45:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:25,519 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2021-11-21 01:45:25,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 12 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2021-11-21 01:45:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:45:25,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:25,524 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:25,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:25,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:45:25,748 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash -746424380, now seen corresponding path program 3 times [2021-11-21 01:45:25,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:25,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690142345] [2021-11-21 01:45:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:25,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:25,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:25,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690142345] [2021-11-21 01:45:25,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690142345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:25,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363166314] [2021-11-21 01:45:25,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:45:25,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:25,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:25,903 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:25,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:45:25,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:45:25,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:45:25,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:26,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:26,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363166314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371984985] [2021-11-21 01:45:26,469 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:45:26,469 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:26,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:26,470 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:26,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:26,484 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:45:27,351 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:27,758 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:27,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:27,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-21 01:45:27,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765860959] [2021-11-21 01:45:27,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:27,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:45:27,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:27,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:45:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:45:27,761 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 24 states, 23 states have (on average 6.086956521739131) internal successors, (140), 24 states have internal predecessors, (140), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:27,862 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2021-11-21 01:45:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:45:27,862 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.086956521739131) internal successors, (140), 24 states have internal predecessors, (140), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-21 01:45:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:27,864 INFO L225 Difference]: With dead ends: 195 [2021-11-21 01:45:27,864 INFO L226 Difference]: Without dead ends: 194 [2021-11-21 01:45:27,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:45:27,866 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 189 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:27,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 188 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-21 01:45:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-11-21 01:45:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 191 states have (on average 1.1361256544502618) internal successors, (217), 192 states have internal predecessors, (217), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 219 transitions. [2021-11-21 01:45:27,872 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 219 transitions. Word has length 72 [2021-11-21 01:45:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:27,872 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 219 transitions. [2021-11-21 01:45:27,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.086956521739131) internal successors, (140), 24 states have internal predecessors, (140), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 219 transitions. [2021-11-21 01:45:27,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 01:45:27,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:27,874 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:27,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:28,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:45:28,096 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1288971928, now seen corresponding path program 4 times [2021-11-21 01:45:28,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:28,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078758564] [2021-11-21 01:45:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:28,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:28,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078758564] [2021-11-21 01:45:28,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078758564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547699275] [2021-11-21 01:45:28,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:45:28,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:28,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:28,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:28,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:45:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:45:28,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:28,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:29,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547699275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:29,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724990104] [2021-11-21 01:45:29,937 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:45:29,937 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:29,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:29,938 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:29,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:29,949 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:45:30,845 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:31,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:31,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:31,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-21 01:45:31,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101449140] [2021-11-21 01:45:31,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:31,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:45:31,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:31,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:45:31,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1249, Invalid=1943, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 01:45:31,239 INFO L87 Difference]: Start difference. First operand 194 states and 219 transitions. Second operand has 48 states, 47 states have (on average 6.042553191489362) internal successors, (284), 48 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:31,508 INFO L93 Difference]: Finished difference Result 387 states and 459 transitions. [2021-11-21 01:45:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:45:31,508 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.042553191489362) internal successors, (284), 48 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-21 01:45:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:31,511 INFO L225 Difference]: With dead ends: 387 [2021-11-21 01:45:31,511 INFO L226 Difference]: Without dead ends: 386 [2021-11-21 01:45:31,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1249, Invalid=1943, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 01:45:31,513 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 614 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:31,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 340 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:45:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-21 01:45:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-21 01:45:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 383 states have (on average 1.1305483028720626) internal successors, (433), 384 states have internal predecessors, (433), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 435 transitions. [2021-11-21 01:45:31,524 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 435 transitions. Word has length 144 [2021-11-21 01:45:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:31,524 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 435 transitions. [2021-11-21 01:45:31,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.042553191489362) internal successors, (284), 48 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 435 transitions. [2021-11-21 01:45:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-21 01:45:31,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:31,529 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:31,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:31,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:31,744 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1050896448, now seen corresponding path program 5 times [2021-11-21 01:45:31,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218547269] [2021-11-21 01:45:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:31,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 6486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:32,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:32,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218547269] [2021-11-21 01:45:32,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218547269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:32,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193545546] [2021-11-21 01:45:32,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:45:32,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:32,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:32,973 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:32,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:45:33,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-21 01:45:33,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:33,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 01:45:33,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 6486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:33,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 6486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:36,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193545546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:36,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261805722] [2021-11-21 01:45:36,896 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:45:36,897 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:36,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:36,897 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:36,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:36,911 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:45:37,726 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:38,346 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:38,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:38,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-21 01:45:38,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892253583] [2021-11-21 01:45:38,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:38,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-21 01:45:38,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:38,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-21 01:45:38,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4777, Invalid=6143, Unknown=0, NotChecked=0, Total=10920 [2021-11-21 01:45:38,360 INFO L87 Difference]: Start difference. First operand 386 states and 435 transitions. Second operand has 96 states, 95 states have (on average 6.021052631578947) internal successors, (572), 96 states have internal predecessors, (572), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:39,675 INFO L93 Difference]: Finished difference Result 771 states and 915 transitions. [2021-11-21 01:45:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-21 01:45:39,676 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 6.021052631578947) internal successors, (572), 96 states have internal predecessors, (572), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-11-21 01:45:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:39,680 INFO L225 Difference]: With dead ends: 771 [2021-11-21 01:45:39,680 INFO L226 Difference]: Without dead ends: 770 [2021-11-21 01:45:39,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4777, Invalid=6143, Unknown=0, NotChecked=0, Total=10920 [2021-11-21 01:45:39,686 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1026 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:39,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 696 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:45:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-11-21 01:45:39,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2021-11-21 01:45:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 767 states have (on average 1.1277705345501956) internal successors, (865), 768 states have internal predecessors, (865), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 867 transitions. [2021-11-21 01:45:39,706 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 867 transitions. Word has length 288 [2021-11-21 01:45:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:39,706 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 867 transitions. [2021-11-21 01:45:39,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 6.021052631578947) internal successors, (572), 96 states have internal predecessors, (572), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 867 transitions. [2021-11-21 01:45:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-11-21 01:45:39,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:39,722 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 94, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:39,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 01:45:39,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:45:39,947 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:45:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:39,948 INFO L85 PathProgramCache]: Analyzing trace with hash -417236080, now seen corresponding path program 6 times [2021-11-21 01:45:39,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:39,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898259085] [2021-11-21 01:45:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:39,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26790 backedges. 0 proven. 26790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:44,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:44,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898259085] [2021-11-21 01:45:44,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898259085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:45:44,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485566678] [2021-11-21 01:45:44,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:45:44,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:44,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:44,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:44,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:45:44,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:45:44,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:44,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-21 01:45:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 26790 backedges. 0 proven. 26790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:45,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 26790 backedges. 0 proven. 26790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:55,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485566678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:55,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [239703872] [2021-11-21 01:45:55,291 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:45:55,291 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:55,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:55,292 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:55,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:55,310 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:45:56,092 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:56,772 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:56,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:45:56,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-21 01:45:56,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276644588] [2021-11-21 01:45:56,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:56,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-21 01:45:56,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-21 01:45:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18745, Invalid=21455, Unknown=0, NotChecked=0, Total=40200 [2021-11-21 01:45:56,793 INFO L87 Difference]: Start difference. First operand 770 states and 867 transitions. Second operand has 192 states, 191 states have (on average 6.010471204188482) internal successors, (1148), 192 states have internal predecessors, (1148), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:07,615 INFO L93 Difference]: Finished difference Result 1539 states and 1827 transitions. [2021-11-21 01:46:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-21 01:46:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 6.010471204188482) internal successors, (1148), 192 states have internal predecessors, (1148), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 576 [2021-11-21 01:46:07,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:07,624 INFO L225 Difference]: With dead ends: 1539 [2021-11-21 01:46:07,624 INFO L226 Difference]: Without dead ends: 1538 [2021-11-21 01:46:07,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1822 GetRequests, 1623 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=18745, Invalid=21455, Unknown=0, NotChecked=0, Total=40200 [2021-11-21 01:46:07,630 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 2689 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2689 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:07,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2689 Valid, 1368 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:46:07,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-11-21 01:46:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1538. [2021-11-21 01:46:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1535 states have (on average 1.126384364820847) internal successors, (1729), 1536 states have internal predecessors, (1729), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 1731 transitions. [2021-11-21 01:46:07,668 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 1731 transitions. Word has length 576 [2021-11-21 01:46:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:07,669 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 1731 transitions. [2021-11-21 01:46:07,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 6.010471204188482) internal successors, (1148), 192 states have internal predecessors, (1148), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 1731 transitions. [2021-11-21 01:46:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2021-11-21 01:46:07,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:07,730 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 191, 191, 190, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:07,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:07,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:07,943 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:46:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:07,944 INFO L85 PathProgramCache]: Analyzing trace with hash -316939728, now seen corresponding path program 7 times [2021-11-21 01:46:07,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:07,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503979878] [2021-11-21 01:46:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:07,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 108870 backedges. 0 proven. 108870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:21,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:21,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503979878] [2021-11-21 01:46:21,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503979878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:46:21,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768533296] [2021-11-21 01:46:21,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:46:21,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:21,744 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:21,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:46:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:22,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-21 01:46:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 108870 backedges. 0 proven. 108870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:24,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 108870 backedges. 0 proven. 108870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:01,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768533296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017035499] [2021-11-21 01:47:01,437 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:47:01,437 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:01,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:01,438 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:01,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:01,455 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:47:02,113 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:03,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:47:03,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:47:03,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-21 01:47:03,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429134183] [2021-11-21 01:47:03,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:47:03,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-21 01:47:03,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-21 01:47:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74329, Invalid=79727, Unknown=0, NotChecked=0, Total=154056 [2021-11-21 01:47:03,316 INFO L87 Difference]: Start difference. First operand 1538 states and 1731 transitions. Second operand has 384 states, 383 states have (on average 6.005221932114883) internal successors, (2300), 384 states have internal predecessors, (2300), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:38,379 INFO L93 Difference]: Finished difference Result 3075 states and 3651 transitions. [2021-11-21 01:49:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-21 01:49:38,380 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 6.005221932114883) internal successors, (2300), 384 states have internal predecessors, (2300), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1152 [2021-11-21 01:49:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:38,397 INFO L225 Difference]: With dead ends: 3075 [2021-11-21 01:49:38,397 INFO L226 Difference]: Without dead ends: 3074 [2021-11-21 01:49:38,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3646 GetRequests, 3255 SyntacticMatches, 0 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5537 ImplicationChecksByTransitivity, 47.7s TimeCoverageRelationStatistics Valid=74329, Invalid=79727, Unknown=0, NotChecked=0, Total=154056 [2021-11-21 01:49:38,410 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5984 mSDsluCounter, 2704 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5984 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:38,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5984 Valid, 2712 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:49:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-11-21 01:49:38,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 3074. [2021-11-21 01:49:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 3071 states have (on average 1.1256919570172583) internal successors, (3457), 3072 states have internal predecessors, (3457), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 3459 transitions. [2021-11-21 01:49:38,479 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 3459 transitions. Word has length 1152 [2021-11-21 01:49:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:38,481 INFO L470 AbstractCegarLoop]: Abstraction has 3074 states and 3459 transitions. [2021-11-21 01:49:38,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 6.005221932114883) internal successors, (2300), 384 states have internal predecessors, (2300), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 3459 transitions. [2021-11-21 01:49:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2305 [2021-11-21 01:49:38,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:38,533 INFO L514 BasicCegarLoop]: trace histogram [383, 383, 383, 383, 383, 382, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:38,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:49:38,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:49:38,759 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-21 01:49:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -653676688, now seen corresponding path program 8 times [2021-11-21 01:49:38,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:49:38,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127730965] [2021-11-21 01:49:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:38,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:49:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 438918 backedges. 0 proven. 438918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:31,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:50:31,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127730965] [2021-11-21 01:50:31,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127730965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:50:31,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789535543] [2021-11-21 01:50:31,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:50:31,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:31,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:31,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:31,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aae65430-c151-442f-827d-44422da862cc/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:50:37,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2021-11-21 01:50:37,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:37,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 6536 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-21 01:50:37,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 438918 backedges. 0 proven. 438918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:42,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:53:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 438918 backedges. 0 proven. 438918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:53:08,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789535543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:53:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826215175] [2021-11-21 01:53:08,109 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:53:08,110 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:53:08,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:53:08,110 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:53:08,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:53:08,117 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-21 01:53:08,804 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:53:10,658 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:53:10,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:53:10,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2021-11-21 01:53:10,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221994120] [2021-11-21 01:53:10,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:53:10,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-11-21 01:53:10,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-11-21 01:53:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296089, Invalid=306863, Unknown=0, NotChecked=0, Total=602952 [2021-11-21 01:53:10,730 INFO L87 Difference]: Start difference. First operand 3074 states and 3459 transitions. Second operand has 768 states, 767 states have (on average 6.0026075619295955) internal successors, (4604), 768 states have internal predecessors, (4604), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)