./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChawdharyCookGulwaniSagivYang-ESOP2008-easy2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChawdharyCookGulwaniSagivYang-ESOP2008-easy2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF --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 5ecb51c2655999223e2701919887f64497e4c0c5e2f563d3d5ecc5c1480b1b8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:47:10,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:47:10,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:47:10,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:47:10,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:47:10,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:47:10,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:47:10,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:47:10,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:47:10,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:47:10,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:47:10,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:47:10,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:47:10,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:47:10,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:47:10,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:47:10,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:47:10,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:47:10,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:47:10,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:47:10,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:47:10,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:47:10,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:47:10,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:47:10,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:47:10,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:47:10,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:47:10,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:47:10,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:47:10,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:47:10,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:47:10,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:47:10,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:47:10,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:47:10,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:47:10,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:47:10,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:47:10,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:47:10,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:47:10,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:47:10,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:47:10,473 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-12 23:47:10,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:47:10,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:47:10,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:47:10,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:47:10,509 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:47:10,509 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:47:10,509 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:47:10,510 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:47:10,510 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:47:10,510 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:47:10,510 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:47:10,510 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:47:10,511 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:47:10,511 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:47:10,511 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:47:10,511 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:47:10,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:47:10,512 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 23:47:10,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:47:10,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:47:10,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:47:10,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:47:10,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:47:10,513 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-12 23:47:10,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:47:10,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:47:10,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:47:10,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:47:10,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:47:10,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:47:10,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:47:10,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:47:10,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:47:10,522 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:47:10,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:47:10,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:47:10,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:47:10,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:47:10,524 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_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ecb51c2655999223e2701919887f64497e4c0c5e2f563d3d5ecc5c1480b1b8e [2021-11-12 23:47:10,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:47:10,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:47:10,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:47:10,834 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:47:10,836 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:47:10,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/termination-crafted-lit/ChawdharyCookGulwaniSagivYang-ESOP2008-easy2.c [2021-11-12 23:47:10,915 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/data/c3b3f88af/48dac0ec83e0401285b3a527c74c77cc/FLAG3a2442db1 [2021-11-12 23:47:11,318 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:47:11,319 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/sv-benchmarks/c/termination-crafted-lit/ChawdharyCookGulwaniSagivYang-ESOP2008-easy2.c [2021-11-12 23:47:11,329 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/data/c3b3f88af/48dac0ec83e0401285b3a527c74c77cc/FLAG3a2442db1 [2021-11-12 23:47:11,709 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/data/c3b3f88af/48dac0ec83e0401285b3a527c74c77cc [2021-11-12 23:47:11,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:47:11,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:47:11,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:47:11,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:47:11,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:47:11,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:11,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e64cc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11, skipping insertion in model container [2021-11-12 23:47:11,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:11,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:47:11,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:47:11,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:47:11,912 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:47:11,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:47:11,941 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:47:11,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11 WrapperNode [2021-11-12 23:47:11,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:47:11,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:47:11,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:47:11,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:47:11,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:11,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:11,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:47:11,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:47:11,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:47:11,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:47:11,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:11,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:12,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:12,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:12,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:12,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:12,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:12,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:47:12,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:47:12,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:47:12,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:47:12,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (1/1) ... [2021-11-12 23:47:12,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:47:12,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:12,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:47:12,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:47:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:47:12,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:47:12,291 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:47:12,291 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:47:12,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:47:12 BoogieIcfgContainer [2021-11-12 23:47:12,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:47:12,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:47:12,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:47:12,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:47:12,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:47:11" (1/3) ... [2021-11-12 23:47:12,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d94b598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:47:12, skipping insertion in model container [2021-11-12 23:47:12,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:47:11" (2/3) ... [2021-11-12 23:47:12,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d94b598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:47:12, skipping insertion in model container [2021-11-12 23:47:12,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:47:12" (3/3) ... [2021-11-12 23:47:12,303 INFO L111 eAbstractionObserver]: Analyzing ICFG ChawdharyCookGulwaniSagivYang-ESOP2008-easy2.c [2021-11-12 23:47:12,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:47:12,308 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-12 23:47:12,349 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:47:12,356 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 [2021-11-12 23:47:12,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-12 23:47:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 8 states have (on average 1.875) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-12 23:47:12,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:12,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-12 23:47:12,375 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash 60896, now seen corresponding path program 1 times [2021-11-12 23:47:12,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:12,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557895118] [2021-11-12 23:47:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:12,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:12,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:12,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557895118] [2021-11-12 23:47:12,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557895118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:12,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:12,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:47:12,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343991734] [2021-11-12 23:47:12,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:12,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:47:12,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:47:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:12,552 INFO L87 Difference]: Start difference. First operand has 15 states, 8 states have (on average 1.875) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:12,602 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-12 23:47:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:47:12,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-12 23:47:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:12,613 INFO L225 Difference]: With dead ends: 20 [2021-11-12 23:47:12,613 INFO L226 Difference]: Without dead ends: 17 [2021-11-12 23:47:12,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:12,636 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.84ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:12,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.84ms Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 16.40ms Time] [2021-11-12 23:47:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-12 23:47:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-12 23:47:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.6) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-12 23:47:12,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2021-11-12 23:47:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:12,738 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-12 23:47:12,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-12 23:47:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:47:12,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:12,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:47:12,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:47:12,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:12,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1887821, now seen corresponding path program 1 times [2021-11-12 23:47:12,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:12,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618035102] [2021-11-12 23:47:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:12,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:12,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:12,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618035102] [2021-11-12 23:47:12,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618035102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:12,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:12,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:47:12,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281417774] [2021-11-12 23:47:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:12,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:47:12,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:12,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:47:12,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:12,824 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:12,842 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-11-12 23:47:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:47:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-12 23:47:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:12,850 INFO L225 Difference]: With dead ends: 16 [2021-11-12 23:47:12,850 INFO L226 Difference]: Without dead ends: 15 [2021-11-12 23:47:12,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:12,852 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:12,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 5 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 15.67ms Time] [2021-11-12 23:47:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-12 23:47:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-12 23:47:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-12 23:47:12,857 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 4 [2021-11-12 23:47:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:12,858 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-12 23:47:12,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-12 23:47:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:47:12,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:12,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:47:12,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:47:12,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:12,860 INFO L85 PathProgramCache]: Analyzing trace with hash 58522498, now seen corresponding path program 1 times [2021-11-12 23:47:12,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:12,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328210922] [2021-11-12 23:47:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:12,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:12,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:12,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328210922] [2021-11-12 23:47:12,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328210922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:12,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:12,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:47:12,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630430521] [2021-11-12 23:47:12,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:12,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:47:12,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:47:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:12,896 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:12,905 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-12 23:47:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:47:12,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-12 23:47:12,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:12,907 INFO L225 Difference]: With dead ends: 15 [2021-11-12 23:47:12,907 INFO L226 Difference]: Without dead ends: 14 [2021-11-12 23:47:12,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:12,909 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.37ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:12,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 8 Invalid, 5 Unknown, 0 Unchecked, 0.37ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 6.22ms Time] [2021-11-12 23:47:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-12 23:47:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-12 23:47:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-12 23:47:12,915 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2021-11-12 23:47:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:12,915 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-12 23:47:12,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-12 23:47:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 23:47:12,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:12,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 23:47:12,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:47:12,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1814197487, now seen corresponding path program 1 times [2021-11-12 23:47:12,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:12,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281132715] [2021-11-12 23:47:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:12,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:12,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:12,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281132715] [2021-11-12 23:47:12,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281132715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:12,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:12,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:47:12,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840998369] [2021-11-12 23:47:12,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:12,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:47:12,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:12,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:47:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:12,975 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:12,993 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-12 23:47:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:47:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-12 23:47:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:12,995 INFO L225 Difference]: With dead ends: 18 [2021-11-12 23:47:12,995 INFO L226 Difference]: Without dead ends: 17 [2021-11-12 23:47:12,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:12,997 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:12,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 6 Unknown, 0 Unchecked, 0.45ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 14.91ms Time] [2021-11-12 23:47:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-12 23:47:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-12 23:47:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-12 23:47:13,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 6 [2021-11-12 23:47:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-12 23:47:13,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-12 23:47:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:47:13,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:13,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:13,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:47:13,004 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:13,005 INFO L85 PathProgramCache]: Analyzing trace with hash 405547300, now seen corresponding path program 1 times [2021-11-12 23:47:13,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:13,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998039596] [2021-11-12 23:47:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:13,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:13,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:13,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998039596] [2021-11-12 23:47:13,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998039596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:13,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:13,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-12 23:47:13,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972946261] [2021-11-12 23:47:13,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:13,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:47:13,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:13,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:47:13,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:13,042 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:13,065 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-11-12 23:47:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:47:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:47:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:13,067 INFO L225 Difference]: With dead ends: 17 [2021-11-12 23:47:13,067 INFO L226 Difference]: Without dead ends: 16 [2021-11-12 23:47:13,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:13,069 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:13,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 6 Unknown, 0 Unchecked, 0.41ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 19.61ms Time] [2021-11-12 23:47:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-12 23:47:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-12 23:47:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-12 23:47:13,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2021-11-12 23:47:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:13,075 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-12 23:47:13,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-12 23:47:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:47:13,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:13,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:13,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:47:13,076 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:13,077 INFO L85 PathProgramCache]: Analyzing trace with hash -312935535, now seen corresponding path program 1 times [2021-11-12 23:47:13,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:13,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576229821] [2021-11-12 23:47:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:13,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:13,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:13,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576229821] [2021-11-12 23:47:13,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576229821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:13,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:13,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:47:13,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047855517] [2021-11-12 23:47:13,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:13,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:47:13,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:47:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:13,118 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:13,137 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-11-12 23:47:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:47:13,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:47:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:13,141 INFO L225 Difference]: With dead ends: 16 [2021-11-12 23:47:13,141 INFO L226 Difference]: Without dead ends: 15 [2021-11-12 23:47:13,142 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 [2021-11-12 23:47:13,143 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:13,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 5 Unknown, 0 Unchecked, 0.29ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 16.71ms Time] [2021-11-12 23:47:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-12 23:47:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-12 23:47:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-12 23:47:13,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-12 23:47:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:13,148 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-12 23:47:13,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-12 23:47:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 23:47:13,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:13,149 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:13,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:47:13,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:13,159 INFO L85 PathProgramCache]: Analyzing trace with hash -83337101, now seen corresponding path program 1 times [2021-11-12 23:47:13,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:13,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472760339] [2021-11-12 23:47:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:13,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:13,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:13,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472760339] [2021-11-12 23:47:13,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472760339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:13,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356657419] [2021-11-12 23:47:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:13,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:13,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:13,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:13,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:47:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:47:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:13,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:13,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356657419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:13,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491320600] [2021-11-12 23:47:13,406 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:13,419 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:13,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:13,429 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:13,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:13,487 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:13,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:47:13,505 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-12 23:47:13,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:13,520 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:13,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:13,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:13,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:13,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:13,579 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:13,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:13,606 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:13,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:13,615 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:13,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:13,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:13,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:13,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:13,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:13,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:13,651 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:13,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:13,656 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:13,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:13,661 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:13,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:13,669 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:13,671 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:13,675 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:13,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:13,679 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:13,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:13,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:13,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-12 23:47:13,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029565909] [2021-11-12 23:47:13,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:47:13,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:47:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:47:13,883 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:13,912 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-12 23:47:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 23:47:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:13,913 INFO L225 Difference]: With dead ends: 36 [2021-11-12 23:47:13,914 INFO L226 Difference]: Without dead ends: 35 [2021-11-12 23:47:13,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:47:13,915 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.88ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:13,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.88ms Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 17.12ms Time] [2021-11-12 23:47:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-12 23:47:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-11-12 23:47:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-12 23:47:13,922 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 10 [2021-11-12 23:47:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:13,922 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-12 23:47:13,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-12 23:47:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:47:13,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:13,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-12 23:47:13,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:14,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:14,127 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash -204434052, now seen corresponding path program 1 times [2021-11-12 23:47:14,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:14,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725705383] [2021-11-12 23:47:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:14,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:14,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:14,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725705383] [2021-11-12 23:47:14,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725705383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:14,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717269561] [2021-11-12 23:47:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:14,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:14,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:14,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:14,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:47:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:47:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:14,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:14,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717269561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:14,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97545759] [2021-11-12 23:47:14,346 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:14,346 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:14,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:14,346 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:14,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:14,354 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:14,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:47:14,358 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-12 23:47:14,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:14,361 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:14,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:14,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:14,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:14,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:14,380 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:14,383 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:14,391 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:14,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:14,408 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:14,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:14,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:14,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:14,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:14,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:14,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:14,456 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:14,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:14,459 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:14,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:14,467 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:14,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:14,476 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:14,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:14,481 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:14,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:14,486 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:14,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:14,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:14,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-12 23:47:14,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844047870] [2021-11-12 23:47:14,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:14,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:47:14,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:47:14,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:47:14,657 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:14,688 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-11-12 23:47:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-12 23:47:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:14,690 INFO L225 Difference]: With dead ends: 37 [2021-11-12 23:47:14,690 INFO L226 Difference]: Without dead ends: 36 [2021-11-12 23:47:14,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:47:14,692 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:14,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 17.91ms Time] [2021-11-12 23:47:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-12 23:47:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-12 23:47:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-11-12 23:47:14,709 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 13 [2021-11-12 23:47:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:14,709 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-11-12 23:47:14,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-11-12 23:47:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 23:47:14,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:14,713 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1] [2021-11-12 23:47:14,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-12 23:47:14,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:14,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2101518560, now seen corresponding path program 2 times [2021-11-12 23:47:14,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:14,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389815320] [2021-11-12 23:47:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:14,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:15,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:15,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389815320] [2021-11-12 23:47:15,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389815320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:15,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199223831] [2021-11-12 23:47:15,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:47:15,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:15,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:15,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:15,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:47:15,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:47:15,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:15,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:15,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:15,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:15,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199223831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:15,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933228154] [2021-11-12 23:47:15,323 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:15,329 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:15,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:15,330 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:15,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:15,348 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:15,351 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:47:15,356 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-12 23:47:15,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:15,360 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:15,362 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:15,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:15,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:15,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:15,383 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:15,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:15,391 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:15,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:15,402 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:15,405 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:15,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:15,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:15,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:15,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:15,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:15,427 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:15,428 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:15,430 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:15,434 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:15,437 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:15,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:15,445 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:15,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:15,453 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:15,459 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:15,461 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:15,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:15,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:15,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-12 23:47:15,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499772629] [2021-11-12 23:47:15,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:15,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:47:15,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:47:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:47:15,682 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:15,735 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-11-12 23:47:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:47:15,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-12 23:47:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:15,737 INFO L225 Difference]: With dead ends: 81 [2021-11-12 23:47:15,737 INFO L226 Difference]: Without dead ends: 80 [2021-11-12 23:47:15,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:47:15,738 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:15,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 65 Invalid, 33 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 36.82ms Time] [2021-11-12 23:47:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-12 23:47:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-11-12 23:47:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.095890410958904) internal successors, (80), 74 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-11-12 23:47:15,747 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 31 [2021-11-12 23:47:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:15,748 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-11-12 23:47:15,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-11-12 23:47:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-12 23:47:15,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:15,749 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1] [2021-11-12 23:47:15,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:15,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-12 23:47:15,966 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:15,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1398897583, now seen corresponding path program 2 times [2021-11-12 23:47:15,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:15,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054804695] [2021-11-12 23:47:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:15,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:16,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:16,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054804695] [2021-11-12 23:47:16,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054804695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:16,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051213111] [2021-11-12 23:47:16,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:47:16,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:16,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:16,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:16,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:47:16,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:47:16,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:47:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:16,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:16,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051213111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:16,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [936317173] [2021-11-12 23:47:16,258 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:16,258 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:16,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:16,259 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:16,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:16,269 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:16,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:16,272 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-12 23:47:16,273 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:16,275 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:16,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:16,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:16,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:16,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:16,286 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:16,289 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:16,291 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:16,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:16,296 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:16,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:16,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:16,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:16,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:16,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:16,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:16,311 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:16,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:16,315 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:16,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:16,323 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:16,325 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:16,330 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:16,331 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:16,334 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:16,337 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:16,339 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:16,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:16,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:16,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-12 23:47:16,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892757383] [2021-11-12 23:47:16,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:16,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:47:16,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:16,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:47:16,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:47:16,541 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:16,582 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-11-12 23:47:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:47:16,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-12 23:47:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:16,584 INFO L225 Difference]: With dead ends: 79 [2021-11-12 23:47:16,584 INFO L226 Difference]: Without dead ends: 78 [2021-11-12 23:47:16,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:47:16,585 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:16,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 35 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 33.99ms Time] [2021-11-12 23:47:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-12 23:47:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-12 23:47:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 77 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-11-12 23:47:16,593 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 34 [2021-11-12 23:47:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:16,593 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-11-12 23:47:16,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-11-12 23:47:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:47:16,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:16,595 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1] [2021-11-12 23:47:16,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:16,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-12 23:47:16,815 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:16,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1428056832, now seen corresponding path program 3 times [2021-11-12 23:47:16,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:16,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874178347] [2021-11-12 23:47:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:16,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:16,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:16,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874178347] [2021-11-12 23:47:16,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874178347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:16,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429239475] [2021-11-12 23:47:16,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:47:16,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:16,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:16,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:16,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:47:17,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:47:17,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:17,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:47:17,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:17,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:17,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429239475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:17,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204756418] [2021-11-12 23:47:17,519 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:17,519 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:17,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:17,520 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:17,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:17,525 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:17,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:47:17,531 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-12 23:47:17,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:17,535 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:17,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:17,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:17,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:17,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:17,554 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:17,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:17,559 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:17,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:17,564 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:17,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:17,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:17,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:17,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:17,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:17,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:17,602 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:17,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:17,605 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:17,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:17,608 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:17,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:17,613 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:17,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:17,617 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:17,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:17,620 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:17,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:17,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:17,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-11-12 23:47:17,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401591629] [2021-11-12 23:47:17,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:17,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 23:47:17,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:18,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 23:47:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:47:18,000 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 23 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:18,103 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2021-11-12 23:47:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:47:18,103 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 23 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:47:18,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:18,108 INFO L225 Difference]: With dead ends: 171 [2021-11-12 23:47:18,109 INFO L226 Difference]: Without dead ends: 170 [2021-11-12 23:47:18,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 180 SyntacticMatches, 20 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:47:18,111 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 102 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:18,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 133 Invalid, 64 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 61.16ms Time] [2021-11-12 23:47:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-12 23:47:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-11-12 23:47:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 157 states have (on average 1.0828025477707006) internal successors, (170), 158 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2021-11-12 23:47:18,138 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 73 [2021-11-12 23:47:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:18,140 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2021-11-12 23:47:18,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 23 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2021-11-12 23:47:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 23:47:18,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:18,144 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1] [2021-11-12 23:47:18,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:18,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:18,371 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1589970481, now seen corresponding path program 3 times [2021-11-12 23:47:18,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:18,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876857198] [2021-11-12 23:47:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:18,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:18,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:18,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876857198] [2021-11-12 23:47:18,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876857198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:18,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997113930] [2021-11-12 23:47:18,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:47:18,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:18,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:18,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:18,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:47:18,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:47:18,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:18,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:47:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:18,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:19,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997113930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:19,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1611680417] [2021-11-12 23:47:19,124 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:19,125 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:19,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:19,125 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:19,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:19,133 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:19,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:19,139 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-12 23:47:19,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:19,142 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:19,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:19,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:19,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:19,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:19,154 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:19,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:19,158 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:19,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:19,166 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:19,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:19,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:19,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:19,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:19,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:19,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:19,183 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:19,184 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:19,188 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:19,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:19,192 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:19,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:19,198 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:19,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:19,205 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:19,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:19,212 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:19,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:19,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:19,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-11-12 23:47:19,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025172656] [2021-11-12 23:47:19,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:19,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 23:47:19,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:19,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 23:47:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:47:19,576 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand has 24 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:19,672 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2021-11-12 23:47:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:47:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-12 23:47:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:19,675 INFO L225 Difference]: With dead ends: 163 [2021-11-12 23:47:19,675 INFO L226 Difference]: Without dead ends: 162 [2021-11-12 23:47:19,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 188 SyntacticMatches, 21 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:47:19,678 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:19,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 67 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 78.00ms Time] [2021-11-12 23:47:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-12 23:47:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-12 23:47:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.0125) internal successors, (162), 161 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2021-11-12 23:47:19,705 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 76 [2021-11-12 23:47:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:19,706 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2021-11-12 23:47:19,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2021-11-12 23:47:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 23:47:19,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:19,714 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1] [2021-11-12 23:47:19,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:19,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:19,931 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:19,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash -85722944, now seen corresponding path program 4 times [2021-11-12 23:47:19,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:19,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489934370] [2021-11-12 23:47:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:19,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:20,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:20,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489934370] [2021-11-12 23:47:20,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489934370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:20,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755484414] [2021-11-12 23:47:20,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:47:20,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:20,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:20,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:47:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:20,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 23:47:20,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:20,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:21,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755484414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:21,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731676834] [2021-11-12 23:47:21,771 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:21,771 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:21,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:21,771 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:21,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:21,776 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:21,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:21,779 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-12 23:47:21,780 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:21,782 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:21,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:21,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:21,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:21,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:21,794 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:21,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:21,798 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:21,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:21,803 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:21,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:21,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:21,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:21,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:21,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:21,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:21,826 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:21,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:21,829 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:21,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:21,832 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:21,834 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:21,837 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:21,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:21,850 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:21,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:21,853 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:22,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:22,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:22,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2021-11-12 23:47:22,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994607688] [2021-11-12 23:47:22,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:22,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-12 23:47:22,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:22,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-12 23:47:22,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=1711, Unknown=0, NotChecked=0, Total=2862 [2021-11-12 23:47:22,687 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 48 states, 47 states have (on average 6.680851063829787) internal successors, (314), 47 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:22,869 INFO L93 Difference]: Finished difference Result 351 states and 374 transitions. [2021-11-12 23:47:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 23:47:22,870 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.680851063829787) internal successors, (314), 47 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-12 23:47:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:22,873 INFO L225 Difference]: With dead ends: 351 [2021-11-12 23:47:22,873 INFO L226 Difference]: Without dead ends: 350 [2021-11-12 23:47:22,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 396 SyntacticMatches, 44 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3510 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1151, Invalid=1711, Unknown=0, NotChecked=0, Total=2862 [2021-11-12 23:47:22,875 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 185 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.42ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:22,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 261 Invalid, 127 Unknown, 0 Unchecked, 2.42ms Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 115.83ms Time] [2021-11-12 23:47:22,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-12 23:47:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 327. [2021-11-12 23:47:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 325 states have (on average 1.0769230769230769) internal successors, (350), 326 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 350 transitions. [2021-11-12 23:47:22,887 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 350 transitions. Word has length 157 [2021-11-12 23:47:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:22,887 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 350 transitions. [2021-11-12 23:47:22,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.680851063829787) internal successors, (314), 47 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 350 transitions. [2021-11-12 23:47:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 23:47:22,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:22,890 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1] [2021-11-12 23:47:22,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:23,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:23,115 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1733361167, now seen corresponding path program 4 times [2021-11-12 23:47:23,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:23,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284521837] [2021-11-12 23:47:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:23,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1727 backedges. 0 proven. 1727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:23,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:23,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284521837] [2021-11-12 23:47:23,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284521837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:23,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122040117] [2021-11-12 23:47:23,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:47:23,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:23,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:23,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:23,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 23:47:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:23,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 23:47:23,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1727 backedges. 0 proven. 1727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:24,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1727 backedges. 0 proven. 1727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:25,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122040117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:25,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745861789] [2021-11-12 23:47:25,106 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:25,106 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:25,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:25,107 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:25,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:25,116 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:25,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:25,119 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-12 23:47:25,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:25,122 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:25,123 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:25,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:25,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:25,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:25,137 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:25,139 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:25,141 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:25,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:25,145 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:25,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:25,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:25,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:25,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:25,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:25,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:25,160 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:25,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:25,163 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:25,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:25,165 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:25,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:25,170 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:25,171 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:25,174 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:25,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:25,176 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:26,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:26,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:26,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2021-11-12 23:47:26,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182182791] [2021-11-12 23:47:26,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:26,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-12 23:47:26,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:26,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-12 23:47:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=1711, Unknown=0, NotChecked=0, Total=2862 [2021-11-12 23:47:26,174 INFO L87 Difference]: Start difference. First operand 327 states and 350 transitions. Second operand has 48 states, 47 states have (on average 6.808510638297872) internal successors, (320), 47 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:26,334 INFO L93 Difference]: Finished difference Result 331 states and 354 transitions. [2021-11-12 23:47:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 23:47:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.808510638297872) internal successors, (320), 47 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-12 23:47:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:26,337 INFO L225 Difference]: With dead ends: 331 [2021-11-12 23:47:26,337 INFO L226 Difference]: Without dead ends: 330 [2021-11-12 23:47:26,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 404 SyntacticMatches, 45 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3510 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1151, Invalid=1711, Unknown=0, NotChecked=0, Total=2862 [2021-11-12 23:47:26,339 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.00ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:26,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 245 Invalid, 131 Unknown, 0 Unchecked, 2.00ms Time], IncrementalHoareTripleChecker [28 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 107.75ms Time] [2021-11-12 23:47:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-12 23:47:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-11-12 23:47:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 328 states have (on average 1.0060975609756098) internal successors, (330), 329 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 330 transitions. [2021-11-12 23:47:26,351 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 330 transitions. Word has length 160 [2021-11-12 23:47:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:26,351 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 330 transitions. [2021-11-12 23:47:26,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.808510638297872) internal successors, (320), 47 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 330 transitions. [2021-11-12 23:47:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-12 23:47:26,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:26,356 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1] [2021-11-12 23:47:26,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:26,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:26,583 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:26,583 INFO L85 PathProgramCache]: Analyzing trace with hash -967270336, now seen corresponding path program 5 times [2021-11-12 23:47:26,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:26,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618612332] [2021-11-12 23:47:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:26,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:27,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:27,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618612332] [2021-11-12 23:47:27,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618612332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:27,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446267834] [2021-11-12 23:47:27,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:47:27,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:27,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:27,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:27,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 23:47:27,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-12 23:47:27,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-12 23:47:27,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:28,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:31,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446267834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:31,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525836378] [2021-11-12 23:47:31,496 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:31,497 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:31,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:31,497 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:31,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:31,509 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:31,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:47:31,510 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-12 23:47:31,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:31,512 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:31,514 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:31,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:31,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:31,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:31,527 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:31,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:31,530 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:31,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:31,534 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:31,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:31,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:31,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:31,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:31,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:31,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:31,545 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:31,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:31,547 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:31,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:31,549 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:31,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:31,556 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:31,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:31,559 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:31,560 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:31,561 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:33,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:33,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:33,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2021-11-12 23:47:33,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762221002] [2021-11-12 23:47:33,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:33,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-12 23:47:33,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:33,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-12 23:47:33,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4583, Invalid=5719, Unknown=0, NotChecked=0, Total=10302 [2021-11-12 23:47:33,896 INFO L87 Difference]: Start difference. First operand 330 states and 330 transitions. Second operand has 96 states, 95 states have (on average 6.842105263157895) internal successors, (650), 95 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:34,333 INFO L93 Difference]: Finished difference Result 711 states and 758 transitions. [2021-11-12 23:47:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-12 23:47:34,334 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 6.842105263157895) internal successors, (650), 95 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2021-11-12 23:47:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:34,339 INFO L225 Difference]: With dead ends: 711 [2021-11-12 23:47:34,339 INFO L226 Difference]: Without dead ends: 710 [2021-11-12 23:47:34,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 828 SyntacticMatches, 92 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13950 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4583, Invalid=5719, Unknown=0, NotChecked=0, Total=10302 [2021-11-12 23:47:34,343 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 498 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.92ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:34,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 527 Invalid, 249 Unknown, 0 Unchecked, 4.92ms Time], IncrementalHoareTripleChecker [55 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 193.11ms Time] [2021-11-12 23:47:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-11-12 23:47:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 663. [2021-11-12 23:47:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 661 states have (on average 1.0741301059001513) internal successors, (710), 662 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 710 transitions. [2021-11-12 23:47:34,364 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 710 transitions. Word has length 325 [2021-11-12 23:47:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:34,365 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 710 transitions. [2021-11-12 23:47:34,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 6.842105263157895) internal successors, (650), 95 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 710 transitions. [2021-11-12 23:47:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-12 23:47:34,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:34,370 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 46, 46, 46, 1, 1] [2021-11-12 23:47:34,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:34,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:34,599 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:34,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1014946161, now seen corresponding path program 5 times [2021-11-12 23:47:34,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:34,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301412685] [2021-11-12 23:47:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:34,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 0 proven. 7475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:35,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:35,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301412685] [2021-11-12 23:47:35,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301412685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:35,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633647595] [2021-11-12 23:47:35,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:47:35,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:35,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:35,762 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:35,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:47:35,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-12 23:47:35,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:35,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-12 23:47:35,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 0 proven. 7475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:36,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7475 backedges. 0 proven. 7475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:39,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633647595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:39,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627984609] [2021-11-12 23:47:39,617 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:39,618 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:39,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:39,618 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:39,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:39,625 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:39,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:47:39,628 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-12 23:47:39,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:39,635 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:39,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:39,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:39,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:39,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:39,644 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:39,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:39,656 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:39,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:39,660 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:39,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:39,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:39,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:39,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:39,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:39,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:39,672 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:39,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:39,674 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:39,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:39,676 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:39,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:39,680 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:39,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:39,683 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:39,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:39,685 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:47:42,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:47:42,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:42,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2021-11-12 23:47:42,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204036827] [2021-11-12 23:47:42,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:42,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-12 23:47:42,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:47:42,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-12 23:47:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4583, Invalid=5719, Unknown=0, NotChecked=0, Total=10302 [2021-11-12 23:47:42,141 INFO L87 Difference]: Start difference. First operand 663 states and 710 transitions. Second operand has 96 states, 95 states have (on average 6.905263157894737) internal successors, (656), 95 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:42,543 INFO L93 Difference]: Finished difference Result 667 states and 714 transitions. [2021-11-12 23:47:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-12 23:47:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 6.905263157894737) internal successors, (656), 95 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2021-11-12 23:47:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:42,548 INFO L225 Difference]: With dead ends: 667 [2021-11-12 23:47:42,548 INFO L226 Difference]: Without dead ends: 666 [2021-11-12 23:47:42,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 836 SyntacticMatches, 93 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13950 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4583, Invalid=5719, Unknown=0, NotChecked=0, Total=10302 [2021-11-12 23:47:42,552 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 94 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 232.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:42,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 482 Invalid, 249 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [53 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 232.18ms Time] [2021-11-12 23:47:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-11-12 23:47:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2021-11-12 23:47:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 664 states have (on average 1.0030120481927711) internal successors, (666), 665 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 666 transitions. [2021-11-12 23:47:42,573 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 666 transitions. Word has length 328 [2021-11-12 23:47:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:42,574 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 666 transitions. [2021-11-12 23:47:42,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 6.905263157894737) internal successors, (656), 95 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 666 transitions. [2021-11-12 23:47:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2021-11-12 23:47:42,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:42,594 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1] [2021-11-12 23:47:42,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:42,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-12 23:47:42,807 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:47:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1019121856, now seen corresponding path program 6 times [2021-11-12 23:47:42,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:47:42,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406594154] [2021-11-12 23:47:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:42,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:47:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:46,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:47:46,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406594154] [2021-11-12 23:47:46,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406594154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:46,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708767533] [2021-11-12 23:47:46,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:47:46,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:46,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:46,067 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:46,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 23:47:46,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:47:46,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:47:46,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-12 23:47:46,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:47,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:47:56,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708767533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:56,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169174792] [2021-11-12 23:47:56,735 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:47:56,735 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:47:56,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:47:56,735 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:47:56,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:47:56,756 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:47:56,757 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:56,758 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-12 23:47:56,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:47:56,760 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:47:56,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:47:56,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:56,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:56,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:56,768 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:47:56,770 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:47:56,771 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:47:56,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:47:56,774 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:47:56,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:47:56,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:56,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:56,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:56,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:56,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:47:56,785 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:56,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:56,787 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:56,788 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:56,790 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:47:56,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:47:56,794 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:47:56,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:47:56,797 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:47:56,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:47:56,799 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:48:05,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:48:05,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:48:05,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 190 [2021-11-12 23:48:05,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297308772] [2021-11-12 23:48:05,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:48:05,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-12 23:48:05,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:48:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-12 23:48:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18359, Invalid=20647, Unknown=0, NotChecked=0, Total=39006 [2021-11-12 23:48:05,079 INFO L87 Difference]: Start difference. First operand 666 states and 666 transitions. Second operand has 192 states, 191 states have (on average 6.9214659685863875) internal successors, (1322), 191 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:07,377 INFO L93 Difference]: Finished difference Result 1431 states and 1526 transitions. [2021-11-12 23:48:07,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-12 23:48:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 6.9214659685863875) internal successors, (1322), 191 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 661 [2021-11-12 23:48:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:07,386 INFO L225 Difference]: With dead ends: 1431 [2021-11-12 23:48:07,386 INFO L226 Difference]: Without dead ends: 1430 [2021-11-12 23:48:07,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2076 GetRequests, 1692 SyntacticMatches, 188 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55566 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=18359, Invalid=20647, Unknown=0, NotChecked=0, Total=39006 [2021-11-12 23:48:07,392 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1005 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.92ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 364.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:07,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 1055 Invalid, 489 Unknown, 0 Unchecked, 11.92ms Time], IncrementalHoareTripleChecker [102 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 364.96ms Time] [2021-11-12 23:48:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-11-12 23:48:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1335. [2021-11-12 23:48:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1333 states have (on average 1.072768192048012) internal successors, (1430), 1334 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1430 transitions. [2021-11-12 23:48:07,435 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1430 transitions. Word has length 661 [2021-11-12 23:48:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:07,437 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1430 transitions. [2021-11-12 23:48:07,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 6.9214659685863875) internal successors, (1322), 191 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1430 transitions. [2021-11-12 23:48:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-12 23:48:07,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:07,443 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 94, 94, 94, 1, 1] [2021-11-12 23:48:07,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:07,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:48:07,659 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:48:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:07,659 INFO L85 PathProgramCache]: Analyzing trace with hash 464648079, now seen corresponding path program 6 times [2021-11-12 23:48:07,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:48:07,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786358870] [2021-11-12 23:48:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:07,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:48:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 31067 backedges. 0 proven. 31067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:48:11,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:48:11,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786358870] [2021-11-12 23:48:11,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786358870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:48:11,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694744471] [2021-11-12 23:48:11,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:48:11,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:48:11,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:48:11,015 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:48:11,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-12 23:48:11,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:48:11,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:48:11,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-12 23:48:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 31067 backedges. 0 proven. 31067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:48:12,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 31067 backedges. 0 proven. 31067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:48:22,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694744471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:48:22,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535145785] [2021-11-12 23:48:22,522 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:48:22,523 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:48:22,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:48:22,523 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:48:22,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:48:22,540 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:48:22,541 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:48:22,542 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-12 23:48:22,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:48:22,543 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:48:22,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:48:22,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:48:22,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:48:22,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:48:22,554 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:48:22,555 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:48:22,557 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:48:22,558 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:48:22,560 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:48:22,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:48:22,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:48:22,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:48:22,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:48:22,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:48:22,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:48:22,571 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:48:22,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:48:22,573 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:48:22,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:48:22,575 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:48:22,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:48:22,579 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:48:22,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:48:22,582 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:48:22,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:48:22,584 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:48:31,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:48:31,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:48:31,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 190 [2021-11-12 23:48:31,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878676203] [2021-11-12 23:48:31,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:48:31,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-12 23:48:31,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:48:31,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-12 23:48:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18359, Invalid=20647, Unknown=0, NotChecked=0, Total=39006 [2021-11-12 23:48:31,087 INFO L87 Difference]: Start difference. First operand 1335 states and 1430 transitions. Second operand has 192 states, 191 states have (on average 6.952879581151833) internal successors, (1328), 191 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:32,521 INFO L93 Difference]: Finished difference Result 1339 states and 1434 transitions. [2021-11-12 23:48:32,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-12 23:48:32,522 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 6.952879581151833) internal successors, (1328), 191 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 664 [2021-11-12 23:48:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:32,531 INFO L225 Difference]: With dead ends: 1339 [2021-11-12 23:48:32,531 INFO L226 Difference]: Without dead ends: 1338 [2021-11-12 23:48:32,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2085 GetRequests, 1700 SyntacticMatches, 189 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55566 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=18359, Invalid=20647, Unknown=0, NotChecked=0, Total=39006 [2021-11-12 23:48:32,536 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 190 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 369.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:32,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 965 Invalid, 493 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [102 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 369.41ms Time] [2021-11-12 23:48:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-11-12 23:48:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1338. [2021-11-12 23:48:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1336 states have (on average 1.001497005988024) internal successors, (1338), 1337 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 1338 transitions. [2021-11-12 23:48:32,572 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 1338 transitions. Word has length 664 [2021-11-12 23:48:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:32,574 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 1338 transitions. [2021-11-12 23:48:32,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 6.952879581151833) internal successors, (1328), 191 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 1338 transitions. [2021-11-12 23:48:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1334 [2021-11-12 23:48:32,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:32,586 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 190, 190, 190, 190, 190, 1, 1] [2021-11-12 23:48:32,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:32,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:48:32,787 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:48:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:32,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1460735296, now seen corresponding path program 7 times [2021-11-12 23:48:32,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:48:32,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816012105] [2021-11-12 23:48:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:32,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:48:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 126065 backedges. 0 proven. 126065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:48:45,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:48:45,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816012105] [2021-11-12 23:48:45,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816012105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:48:45,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314339070] [2021-11-12 23:48:45,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:48:45,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:48:45,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:48:45,305 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:48:45,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 23:48:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 2480 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-12 23:48:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 126065 backedges. 0 proven. 126065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:48:48,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 126065 backedges. 0 proven. 126065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:23,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314339070] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:49:23,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732295090] [2021-11-12 23:49:23,353 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:49:23,354 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:49:23,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:49:23,354 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:49:23,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:49:23,359 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:49:23,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:49:23,360 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-12 23:49:23,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:49:23,365 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:49:23,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:49:23,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:49:23,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:49:23,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:49:23,392 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:49:23,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:49:23,395 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:49:23,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:49:23,398 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:49:23,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:49:23,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:49:23,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:49:23,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:49:23,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:49:23,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:49:23,433 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:49:23,434 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:49:23,434 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:49:23,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:49:23,436 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:49:23,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:49:23,441 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:49:23,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:49:23,444 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:49:23,445 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:49:23,446 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:49:54,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:49:54,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:49:54,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 382 [2021-11-12 23:49:54,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932193297] [2021-11-12 23:49:54,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:49:54,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-12 23:49:54,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:54,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-12 23:49:54,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73559, Invalid=78151, Unknown=0, NotChecked=0, Total=151710 [2021-11-12 23:49:54,360 INFO L87 Difference]: Start difference. First operand 1338 states and 1338 transitions. Second operand has 384 states, 383 states have (on average 6.960835509138382) internal successors, (2666), 383 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:07,288 INFO L93 Difference]: Finished difference Result 2871 states and 3062 transitions. [2021-11-12 23:50:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-12 23:50:07,290 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 6.960835509138382) internal successors, (2666), 383 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1333 [2021-11-12 23:50:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:07,303 INFO L225 Difference]: With dead ends: 2871 [2021-11-12 23:50:07,303 INFO L226 Difference]: Without dead ends: 2870 [2021-11-12 23:50:07,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4188 GetRequests, 3420 SyntacticMatches, 380 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221742 ImplicationChecksByTransitivity, 74.9s TimeCoverageRelationStatistics Valid=73559, Invalid=78151, Unknown=0, NotChecked=0, Total=151710 [2021-11-12 23:50:07,316 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2194 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 531.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.29ms SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 712.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:07,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2194 Valid, 2114 Invalid, 969 Unknown, 0 Unchecked, 21.29ms Time], IncrementalHoareTripleChecker [196 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 712.03ms Time] [2021-11-12 23:50:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-11-12 23:50:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2679. [2021-11-12 23:50:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2677 states have (on average 1.0720956294359358) internal successors, (2870), 2678 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 2870 transitions. [2021-11-12 23:50:07,384 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 2870 transitions. Word has length 1333 [2021-11-12 23:50:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:07,387 INFO L470 AbstractCegarLoop]: Abstraction has 2679 states and 2870 transitions. [2021-11-12 23:50:07,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 6.960835509138382) internal successors, (2666), 383 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 2870 transitions. [2021-11-12 23:50:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1337 [2021-11-12 23:50:07,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:07,404 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 191, 190, 190, 190, 1, 1] [2021-11-12 23:50:07,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:07,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-12 23:50:07,627 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:50:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash 156604815, now seen corresponding path program 7 times [2021-11-12 23:50:07,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:50:07,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777434040] [2021-11-12 23:50:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:07,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:50:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 126635 backedges. 0 proven. 126635 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:20,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:50:20,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777434040] [2021-11-12 23:50:20,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777434040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:20,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264374886] [2021-11-12 23:50:20,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:50:20,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:50:20,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:50:20,427 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:50:20,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:50:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:20,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 2485 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-12 23:50:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 126635 backedges. 0 proven. 126635 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:23,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 126635 backedges. 0 proven. 126635 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:00,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264374886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:51:00,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2143934191] [2021-11-12 23:51:00,483 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:51:00,483 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:51:00,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:51:00,484 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:51:00,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:51:00,494 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:51:00,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:51:00,495 INFO L180 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-11-12 23:51:00,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:51:00,498 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:51:00,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:51:00,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:51:00,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:51:00,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:51:00,520 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:51:00,521 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:51:00,523 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:51:00,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:51:00,526 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:51:00,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:51:00,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:51:00,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:51:00,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:51:00,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:51:00,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:51:00,538 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:51:00,539 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:51:00,540 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:51:00,541 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:51:00,542 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:51:00,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:51:00,546 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:51:00,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:51:00,550 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:51:00,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:51:00,552 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:51:32,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:51:32,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:51:32,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 382 [2021-11-12 23:51:32,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950224634] [2021-11-12 23:51:32,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:51:32,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-12 23:51:32,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:51:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-12 23:51:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73559, Invalid=78151, Unknown=0, NotChecked=0, Total=151710 [2021-11-12 23:51:32,174 INFO L87 Difference]: Start difference. First operand 2679 states and 2870 transitions. Second operand has 384 states, 383 states have (on average 6.976501305483029) internal successors, (2672), 383 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:40,235 INFO L93 Difference]: Finished difference Result 2683 states and 2874 transitions. [2021-11-12 23:51:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-12 23:51:40,237 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 6.976501305483029) internal successors, (2672), 383 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1336 [2021-11-12 23:51:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:40,252 INFO L225 Difference]: With dead ends: 2683 [2021-11-12 23:51:40,252 INFO L226 Difference]: Without dead ends: 2682 [2021-11-12 23:51:40,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4197 GetRequests, 3428 SyntacticMatches, 381 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221742 ImplicationChecksByTransitivity, 77.8s TimeCoverageRelationStatistics Valid=73559, Invalid=78151, Unknown=0, NotChecked=0, Total=151710 [2021-11-12 23:51:40,260 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 382 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 537.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.38ms SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 694.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:40,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 1926 Invalid, 972 Unknown, 0 Unchecked, 11.38ms Time], IncrementalHoareTripleChecker [196 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 694.40ms Time] [2021-11-12 23:51:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-11-12 23:51:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2682. [2021-11-12 23:51:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2680 states have (on average 1.0007462686567163) internal successors, (2682), 2681 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 2682 transitions. [2021-11-12 23:51:40,324 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 2682 transitions. Word has length 1336 [2021-11-12 23:51:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:40,326 INFO L470 AbstractCegarLoop]: Abstraction has 2682 states and 2682 transitions. [2021-11-12 23:51:40,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 6.976501305483029) internal successors, (2672), 383 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 2682 transitions. [2021-11-12 23:51:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2678 [2021-11-12 23:51:40,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:40,380 INFO L514 BasicCegarLoop]: trace histogram [383, 382, 382, 382, 382, 382, 382, 1, 1] [2021-11-12 23:51:40,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:40,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-11-12 23:51:40,591 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-12 23:51:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -156743360, now seen corresponding path program 8 times [2021-11-12 23:51:40,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:51:40,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916945071] [2021-11-12 23:51:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:40,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:51:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 510161 backedges. 0 proven. 510161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:30,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:52:30,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916945071] [2021-11-12 23:52:30,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916945071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:52:30,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539104170] [2021-11-12 23:52:30,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:52:30,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:30,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:52:30,152 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:52:30,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1adbe43-34d0-4cb1-81f2-71afde32cd7f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 23:52:34,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2021-11-12 23:52:34,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:52:34,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 4976 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-12 23:52:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 510161 backedges. 0 proven. 510161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:39,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 510161 backedges. 0 proven. 510161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:54:58,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539104170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:58,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200910569] [2021-11-12 23:54:58,743 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:54:58,743 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:54:58,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:54:58,744 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:54:58,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:54:58,752 INFO L180 QuantifierPusher]: treesize reduction 13, result has 59.4 percent of original size [2021-11-12 23:54:58,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:54:58,754 INFO L180 QuantifierPusher]: treesize reduction 10, result has 65.5 percent of original size [2021-11-12 23:54:58,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-12 23:54:58,755 INFO L180 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-11-12 23:54:58,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-12 23:54:58,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:54:58,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:54:58,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:54:58,770 INFO L180 QuantifierPusher]: treesize reduction 10, result has 82.5 percent of original size [2021-11-12 23:54:58,772 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-12 23:54:58,773 INFO L180 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-11-12 23:54:58,774 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-12 23:54:58,776 INFO L180 QuantifierPusher]: treesize reduction 8, result has 87.5 percent of original size [2021-11-12 23:54:58,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:54:58,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:54:58,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:54:58,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:54:58,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:54:58,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:54:58,795 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:54:58,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:54:58,798 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:54:58,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:54:58,800 INFO L180 QuantifierPusher]: treesize reduction 8, result has 78.4 percent of original size [2021-11-12 23:54:58,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 23:54:58,803 INFO L180 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-11-12 23:54:58,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:54:58,806 INFO L180 QuantifierPusher]: treesize reduction 3, result has 90.0 percent of original size [2021-11-12 23:54:58,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-12 23:54:58,808 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:56:58,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:56:58,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:56:58,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 766 [2021-11-12 23:56:58,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164938454] [2021-11-12 23:56:58,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:56:58,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-11-12 23:56:58,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:56:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-11-12 23:56:58,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294551, Invalid=303751, Unknown=0, NotChecked=0, Total=598302 [2021-11-12 23:56:58,647 INFO L87 Difference]: Start difference. First operand 2682 states and 2682 transitions. Second operand has 768 states, 767 states have (on average 6.980443285528032) internal successors, (5354), 767 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)