./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de331d1f778f147a4d32c0286c0018cb5b5cf61f2b6c0952b6bed68b0f715eaf --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:30:18,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:30:18,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:30:18,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:30:18,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:30:18,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:30:18,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:30:18,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:30:18,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:30:18,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:30:18,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:30:18,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:30:18,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:30:18,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:30:18,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:30:18,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:30:18,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:30:18,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:30:18,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:30:18,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:30:18,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:30:18,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:30:18,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:30:18,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:30:18,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:30:18,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:30:18,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:30:18,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:30:18,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:30:18,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:30:18,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:30:18,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:30:18,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:30:18,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:30:18,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:30:18,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:30:18,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:30:18,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:30:18,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:30:18,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:30:18,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:30:18,211 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-25 19:30:18,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:30:18,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:30:18,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:30:18,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:30:18,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:30:18,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:30:18,244 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:30:18,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:30:18,244 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:30:18,245 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:30:18,245 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:30:18,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:30:18,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:30:18,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:30:18,246 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:30:18,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:30:18,246 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:30:18,246 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:30:18,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:30:18,247 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:30:18,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:30:18,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:30:18,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:30:18,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:30:18,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:30:18,249 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 19:30:18,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:30:18,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:30:18,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:30:18,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:30:18,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:30:18,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:30:18,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:30:18,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:30:18,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:30:18,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:30:18,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:30:18,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:30:18,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:30:18,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:30:18,252 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_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de331d1f778f147a4d32c0286c0018cb5b5cf61f2b6c0952b6bed68b0f715eaf [2021-11-25 19:30:18,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:30:18,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:30:18,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:30:18,546 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:30:18,546 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:30:18,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c [2021-11-25 19:30:18,616 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/data/9d1b7caa6/ea44ca9f15f7413e96c4b07a9bd00307/FLAGd79ecbdb6 [2021-11-25 19:30:19,098 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:30:19,103 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c [2021-11-25 19:30:19,110 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/data/9d1b7caa6/ea44ca9f15f7413e96c4b07a9bd00307/FLAGd79ecbdb6 [2021-11-25 19:30:19,492 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/data/9d1b7caa6/ea44ca9f15f7413e96c4b07a9bd00307 [2021-11-25 19:30:19,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:30:19,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:30:19,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:30:19,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:30:19,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:30:19,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103d5f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19, skipping insertion in model container [2021-11-25 19:30:19,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:30:19,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:30:19,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:30:19,691 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:30:19,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:30:19,727 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:30:19,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19 WrapperNode [2021-11-25 19:30:19,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:30:19,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:30:19,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:30:19,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:30:19,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,758 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 8 [2021-11-25 19:30:19,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:30:19,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:30:19,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:30:19,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:30:19,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:30:19,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:30:19,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:30:19,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:30:19,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (1/1) ... [2021-11-25 19:30:19,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:30:19,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:19,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:30:19,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:30:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-25 19:30:19,880 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-25 19:30:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:30:19,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:30:19,934 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:30:19,936 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:30:20,052 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:30:20,071 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:30:20,072 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:30:20,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:30:20 BoogieIcfgContainer [2021-11-25 19:30:20,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:30:20,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:30:20,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:30:20,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:30:20,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:30:19" (1/3) ... [2021-11-25 19:30:20,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fa9ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:30:20, skipping insertion in model container [2021-11-25 19:30:20,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:30:19" (2/3) ... [2021-11-25 19:30:20,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fa9ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:30:20, skipping insertion in model container [2021-11-25 19:30:20,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:30:20" (3/3) ... [2021-11-25 19:30:20,084 INFO L111 eAbstractionObserver]: Analyzing ICFG HarrisLalNoriRajamani-SAS2010-Fig1.c [2021-11-25 19:30:20,089 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:30:20,090 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-25 19:30:20,136 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:30:20,144 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 [2021-11-25 19:30:20,145 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-25 19:30:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:30:20,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:30:20,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:20,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:20,192 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:20,204 INFO L85 PathProgramCache]: Analyzing trace with hash 247949617, now seen corresponding path program 1 times [2021-11-25 19:30:20,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:20,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939449801] [2021-11-25 19:30:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:20,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:20,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:20,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939449801] [2021-11-25 19:30:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939449801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:20,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:20,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:30:20,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195299076] [2021-11-25 19:30:20,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:20,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:30:20,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:20,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:30:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:30:20,491 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:20,607 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-11-25 19:30:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:30:20,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 19:30:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:20,620 INFO L225 Difference]: With dead ends: 48 [2021-11-25 19:30:20,621 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 19:30:20,624 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 [2021-11-25 19:30:20,628 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:20,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:30:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 19:30:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-11-25 19:30:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.72) internal successors, (43), 33 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-11-25 19:30:20,669 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 7 [2021-11-25 19:30:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:20,669 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-11-25 19:30:20,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-11-25 19:30:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:30:20,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:20,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:20,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:30:20,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:20,673 INFO L85 PathProgramCache]: Analyzing trace with hash -903496418, now seen corresponding path program 1 times [2021-11-25 19:30:20,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:20,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405065353] [2021-11-25 19:30:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:20,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:20,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:20,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405065353] [2021-11-25 19:30:20,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405065353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:20,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:20,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:30:20,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579810021] [2021-11-25 19:30:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:20,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:30:20,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:30:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:30:20,787 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:20,820 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-11-25 19:30:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:30:20,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 19:30:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:20,823 INFO L225 Difference]: With dead ends: 56 [2021-11-25 19:30:20,823 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 19:30:20,824 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 [2021-11-25 19:30:20,826 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:20,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 33 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 19:30:20,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-11-25 19:30:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 48 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 71 transitions. [2021-11-25 19:30:20,839 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 71 transitions. Word has length 8 [2021-11-25 19:30:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:20,840 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 71 transitions. [2021-11-25 19:30:20,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 71 transitions. [2021-11-25 19:30:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:30:20,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:20,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:20,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:30:20,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:20,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2058153125, now seen corresponding path program 1 times [2021-11-25 19:30:20,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:20,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374272204] [2021-11-25 19:30:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:20,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:20,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:20,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374272204] [2021-11-25 19:30:20,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374272204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:20,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:20,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:30:20,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113046180] [2021-11-25 19:30:20,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:20,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:30:20,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:30:20,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:30:20,901 INFO L87 Difference]: Start difference. First operand 50 states and 71 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:20,960 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2021-11-25 19:30:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:30:20,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:30:20,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:20,963 INFO L225 Difference]: With dead ends: 65 [2021-11-25 19:30:20,964 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 19:30:20,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:30:20,966 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:20,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 19:30:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-11-25 19:30:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 54 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2021-11-25 19:30:20,981 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 9 [2021-11-25 19:30:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:20,981 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2021-11-25 19:30:20,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2021-11-25 19:30:20,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:30:20,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:20,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:20,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:30:20,984 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2058152774, now seen corresponding path program 1 times [2021-11-25 19:30:20,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:20,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044603439] [2021-11-25 19:30:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:20,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:21,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:21,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044603439] [2021-11-25 19:30:21,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044603439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:21,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:21,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:30:21,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319206411] [2021-11-25 19:30:21,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:21,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:30:21,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:21,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:30:21,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:30:21,036 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:21,085 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2021-11-25 19:30:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:30:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:30:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:21,088 INFO L225 Difference]: With dead ends: 59 [2021-11-25 19:30:21,088 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 19:30:21,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:30:21,090 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:21,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 28 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 19:30:21,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-11-25 19:30:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 54 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 77 transitions. [2021-11-25 19:30:21,102 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 77 transitions. Word has length 9 [2021-11-25 19:30:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:21,103 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 77 transitions. [2021-11-25 19:30:21,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:21,103 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 77 transitions. [2021-11-25 19:30:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:30:21,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:21,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:21,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:30:21,105 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash -621762489, now seen corresponding path program 1 times [2021-11-25 19:30:21,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:21,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693970540] [2021-11-25 19:30:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:21,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:21,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:21,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693970540] [2021-11-25 19:30:21,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693970540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:21,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:21,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:30:21,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920500643] [2021-11-25 19:30:21,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:21,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:30:21,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:21,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:30:21,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:30:21,191 INFO L87 Difference]: Start difference. First operand 56 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:21,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:21,290 INFO L93 Difference]: Finished difference Result 108 states and 149 transitions. [2021-11-25 19:30:21,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:30:21,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:30:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:21,296 INFO L225 Difference]: With dead ends: 108 [2021-11-25 19:30:21,296 INFO L226 Difference]: Without dead ends: 107 [2021-11-25 19:30:21,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:30:21,300 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:21,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 70 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:30:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-25 19:30:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-11-25 19:30:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 98 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2021-11-25 19:30:21,320 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 10 [2021-11-25 19:30:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:21,320 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2021-11-25 19:30:21,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2021-11-25 19:30:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:30:21,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:21,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:21,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:30:21,323 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash -621773380, now seen corresponding path program 1 times [2021-11-25 19:30:21,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:21,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380526728] [2021-11-25 19:30:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:21,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:21,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:21,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380526728] [2021-11-25 19:30:21,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380526728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:21,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:21,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:30:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157893794] [2021-11-25 19:30:21,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:21,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:30:21,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:30:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:30:21,418 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:21,505 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-11-25 19:30:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:30:21,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:30:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:21,509 INFO L225 Difference]: With dead ends: 109 [2021-11-25 19:30:21,513 INFO L226 Difference]: Without dead ends: 108 [2021-11-25 19:30:21,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:30:21,516 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:21,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 71 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:30:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-25 19:30:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-11-25 19:30:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.5108695652173914) internal successors, (139), 98 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 141 transitions. [2021-11-25 19:30:21,543 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 141 transitions. Word has length 10 [2021-11-25 19:30:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:21,544 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 141 transitions. [2021-11-25 19:30:21,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 141 transitions. [2021-11-25 19:30:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:30:21,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:21,549 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:21,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:30:21,550 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:21,550 INFO L85 PathProgramCache]: Analyzing trace with hash -676662528, now seen corresponding path program 1 times [2021-11-25 19:30:21,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:21,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100287179] [2021-11-25 19:30:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:21,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:21,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:21,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100287179] [2021-11-25 19:30:21,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100287179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:21,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061079804] [2021-11-25 19:30:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:21,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:21,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:21,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:21,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:30:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:21,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:30:21,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:21,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:21,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061079804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:21,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [90383122] [2021-11-25 19:30:21,888 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:30:21,889 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:21,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:21,900 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:21,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:21,964 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:30:22,163 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:22,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1012#(and (<= f_~d 1) (= |f_#in~d| 1) (<= 1 f_~k~0) (<= f_~x~0 2147483647) (<= 1 f_~d) (< 2147483647 (* 2 f_~z~0)) (<= f_~k~0 1073741823) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)) (<= 0 (+ f_~x~0 2147483648)))' at error location [2021-11-25 19:30:22,487 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:22,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:22,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 19:30:22,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312902425] [2021-11-25 19:30:22,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:22,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:30:22,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:30:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:30:22,490 INFO L87 Difference]: Start difference. First operand 101 states and 141 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:22,560 INFO L93 Difference]: Finished difference Result 250 states and 351 transitions. [2021-11-25 19:30:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:30:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:30:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:22,563 INFO L225 Difference]: With dead ends: 250 [2021-11-25 19:30:22,563 INFO L226 Difference]: Without dead ends: 248 [2021-11-25 19:30:22,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:30:22,565 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 84 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:22,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 71 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:30:22,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-25 19:30:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 119. [2021-11-25 19:30:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.481818181818182) internal successors, (163), 116 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2021-11-25 19:30:22,580 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 10 [2021-11-25 19:30:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:22,580 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2021-11-25 19:30:22,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2021-11-25 19:30:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:30:22,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:22,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:22,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:22,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:22,800 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1736462088, now seen corresponding path program 1 times [2021-11-25 19:30:22,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:22,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905738387] [2021-11-25 19:30:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:22,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:22,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:22,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905738387] [2021-11-25 19:30:22,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905738387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:22,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:22,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:30:22,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811854242] [2021-11-25 19:30:22,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:22,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:30:22,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:30:22,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:30:22,869 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:22,906 INFO L93 Difference]: Finished difference Result 119 states and 165 transitions. [2021-11-25 19:30:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:30:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:30:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:22,908 INFO L225 Difference]: With dead ends: 119 [2021-11-25 19:30:22,908 INFO L226 Difference]: Without dead ends: 118 [2021-11-25 19:30:22,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:30:22,914 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:22,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-25 19:30:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-25 19:30:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 115 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2021-11-25 19:30:22,934 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 10 [2021-11-25 19:30:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:22,934 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2021-11-25 19:30:22,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2021-11-25 19:30:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:30:22,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:22,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:22,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:30:22,936 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:22,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1736451197, now seen corresponding path program 1 times [2021-11-25 19:30:22,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:22,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600065379] [2021-11-25 19:30:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:22,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:22,999 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:23,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600065379] [2021-11-25 19:30:23,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600065379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:23,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:23,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:30:23,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962095333] [2021-11-25 19:30:23,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:23,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:30:23,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:23,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:30:23,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:30:23,003 INFO L87 Difference]: Start difference. First operand 118 states and 161 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:23,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:23,041 INFO L93 Difference]: Finished difference Result 122 states and 165 transitions. [2021-11-25 19:30:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:30:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:30:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:23,043 INFO L225 Difference]: With dead ends: 122 [2021-11-25 19:30:23,043 INFO L226 Difference]: Without dead ends: 121 [2021-11-25 19:30:23,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:30:23,046 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:23,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-25 19:30:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2021-11-25 19:30:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 61 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-11-25 19:30:23,062 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 10 [2021-11-25 19:30:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:23,062 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-11-25 19:30:23,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-11-25 19:30:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:30:23,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:23,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:23,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:30:23,067 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1267695893, now seen corresponding path program 1 times [2021-11-25 19:30:23,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:23,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827259291] [2021-11-25 19:30:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:23,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:23,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:23,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827259291] [2021-11-25 19:30:23,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827259291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:23,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755233784] [2021-11-25 19:30:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:23,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:23,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:23,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:30:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:30:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:23,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:30:23,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755233784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:23,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:30:23,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 19:30:23,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247453462] [2021-11-25 19:30:23,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:23,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:30:23,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:23,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:30:23,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:30:23,321 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:23,364 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-11-25 19:30:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:30:23,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 19:30:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:23,366 INFO L225 Difference]: With dead ends: 82 [2021-11-25 19:30:23,366 INFO L226 Difference]: Without dead ends: 81 [2021-11-25 19:30:23,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:30:23,367 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:23,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-25 19:30:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 56. [2021-11-25 19:30:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.34) internal successors, (67), 54 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-11-25 19:30:23,380 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 13 [2021-11-25 19:30:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:23,381 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-11-25 19:30:23,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-11-25 19:30:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:30:23,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:23,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:23,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:23,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:30:23,600 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash 226732383, now seen corresponding path program 1 times [2021-11-25 19:30:23,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:23,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257964320] [2021-11-25 19:30:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:23,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:23,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:23,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257964320] [2021-11-25 19:30:23,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257964320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:23,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691565428] [2021-11-25 19:30:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:23,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:23,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:23,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:23,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:30:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:30:23,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:23,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:30:23,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691565428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:23,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:30:23,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 19:30:23,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200750235] [2021-11-25 19:30:23,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:23,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:30:23,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:30:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:30:23,818 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:23,848 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2021-11-25 19:30:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:30:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 19:30:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:23,850 INFO L225 Difference]: With dead ends: 56 [2021-11-25 19:30:23,850 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 19:30:23,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:30:23,851 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:23,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:23,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 19:30:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-25 19:30:23,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.3) internal successors, (65), 53 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-25 19:30:23,854 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 15 [2021-11-25 19:30:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:23,854 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-25 19:30:23,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-25 19:30:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:30:23,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:23,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:23,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:24,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:30:24,072 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:24,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1399069051, now seen corresponding path program 1 times [2021-11-25 19:30:24,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:24,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534702397] [2021-11-25 19:30:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:24,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:24,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:24,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534702397] [2021-11-25 19:30:24,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534702397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:24,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757765886] [2021-11-25 19:30:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:24,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:24,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:24,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:24,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:30:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:24,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:30:24,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:24,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:24,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757765886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098521590] [2021-11-25 19:30:24,247 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:30:24,247 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:24,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:24,247 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:24,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:24,258 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:30:24,631 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:25,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2322#(and (<= f_~k~0 1) (<= f_~d 1) (<= 0 (+ f_~x~0 f_~d)) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~x~0 f_~d) 2147483647) (< (+ 2147483647 f_~z~0) 0) (<= 1 f_~d) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2021-11-25 19:30:25,099 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:25,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:25,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 19:30:25,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108562644] [2021-11-25 19:30:25,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:25,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:30:25,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:25,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:30:25,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:30:25,101 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:25,146 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2021-11-25 19:30:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:30:25,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 19:30:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:25,147 INFO L225 Difference]: With dead ends: 104 [2021-11-25 19:30:25,147 INFO L226 Difference]: Without dead ends: 103 [2021-11-25 19:30:25,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:30:25,148 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:25,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 54 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-25 19:30:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-25 19:30:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 101 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2021-11-25 19:30:25,151 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 18 [2021-11-25 19:30:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:25,152 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2021-11-25 19:30:25,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2021-11-25 19:30:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:30:25,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:25,153 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:25,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:25,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:25,354 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash 678995057, now seen corresponding path program 2 times [2021-11-25 19:30:25,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213058333] [2021-11-25 19:30:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:25,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:30:25,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213058333] [2021-11-25 19:30:25,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213058333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:25,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98199508] [2021-11-25 19:30:25,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:30:25,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:25,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:25,386 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:25,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:30:25,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 19:30:25,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:30:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:30:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:30:25,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:30:25,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98199508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978075080] [2021-11-25 19:30:25,521 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:30:25,521 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:25,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:25,522 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:25,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:25,533 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:30:25,661 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:25,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2658#(and (<= f_~d 1) (= |f_#in~d| 1) (<= 1 f_~k~0) (<= f_~x~0 2147483647) (<= 1 f_~d) (< 2147483647 (* 2 f_~z~0)) (<= f_~k~0 1073741823) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)) (<= 0 (+ f_~x~0 2147483648)))' at error location [2021-11-25 19:30:25,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:25,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:25,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 19:30:25,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474468582] [2021-11-25 19:30:25,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:25,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:30:25,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:30:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:30:25,916 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:25,946 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2021-11-25 19:30:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:30:25,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 19:30:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:25,948 INFO L225 Difference]: With dead ends: 143 [2021-11-25 19:30:25,948 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 19:30:25,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:30:25,950 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:25,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 19:30:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 101. [2021-11-25 19:30:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 99 states have internal predecessors, (120), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2021-11-25 19:30:25,954 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 19 [2021-11-25 19:30:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:25,955 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2021-11-25 19:30:25,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2021-11-25 19:30:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:30:25,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:25,956 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:25,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:26,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:26,179 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:26,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1623141048, now seen corresponding path program 1 times [2021-11-25 19:30:26,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:26,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711127404] [2021-11-25 19:30:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:26,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:30:26,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711127404] [2021-11-25 19:30:26,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711127404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:30:26,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:30:26,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:30:26,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886080649] [2021-11-25 19:30:26,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:30:26,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:30:26,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:26,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:30:26,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:30:26,206 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:26,231 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2021-11-25 19:30:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:30:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-25 19:30:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:26,235 INFO L225 Difference]: With dead ends: 141 [2021-11-25 19:30:26,237 INFO L226 Difference]: Without dead ends: 140 [2021-11-25 19:30:26,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:30:26,239 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:26,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-25 19:30:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 50. [2021-11-25 19:30:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-25 19:30:26,244 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 23 [2021-11-25 19:30:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:26,244 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-25 19:30:26,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:26,245 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-25 19:30:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:30:26,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:26,246 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:26,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:30:26,248 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:26,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:26,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1249271002, now seen corresponding path program 2 times [2021-11-25 19:30:26,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:26,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775192726] [2021-11-25 19:30:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:26,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:26,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:26,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775192726] [2021-11-25 19:30:26,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775192726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:26,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439781492] [2021-11-25 19:30:26,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:30:26,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:26,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:26,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:26,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:30:26,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:30:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:30:26,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:30:26,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:26,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:26,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439781492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:26,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951928875] [2021-11-25 19:30:26,626 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:30:26,626 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:26,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:26,626 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:26,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:26,634 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:30:26,911 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:27,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3340#(and (<= f_~k~0 1) (<= f_~d 1) (<= 0 (+ f_~x~0 f_~d)) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~x~0 f_~d) 2147483647) (< (+ 2147483647 f_~z~0) 0) (<= 1 f_~d) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2021-11-25 19:30:27,469 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:27,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:27,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-25 19:30:27,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474659482] [2021-11-25 19:30:27,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:27,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:30:27,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:30:27,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:30:27,471 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 12 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:27,521 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-11-25 19:30:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:30:27,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 12 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-25 19:30:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:27,523 INFO L225 Difference]: With dead ends: 99 [2021-11-25 19:30:27,523 INFO L226 Difference]: Without dead ends: 98 [2021-11-25 19:30:27,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:30:27,524 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:27,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 100 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:30:27,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-25 19:30:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-25 19:30:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2021-11-25 19:30:27,527 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 36 [2021-11-25 19:30:27,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:27,527 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2021-11-25 19:30:27,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 12 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2021-11-25 19:30:27,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 19:30:27,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:27,530 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:27,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:27,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:30:27,731 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash -746424380, now seen corresponding path program 3 times [2021-11-25 19:30:27,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:27,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591010159] [2021-11-25 19:30:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:27,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:27,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:27,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591010159] [2021-11-25 19:30:27,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591010159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:27,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013134397] [2021-11-25 19:30:27,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:30:27,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:27,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:27,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:27,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:30:27,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:30:27,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:30:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:30:27,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:28,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:28,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013134397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:28,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780120944] [2021-11-25 19:30:28,534 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:30:28,534 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:28,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:28,535 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:28,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:28,541 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:30:28,785 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:29,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4002#(and (<= f_~k~0 1) (<= f_~d 1) (<= 0 (+ f_~x~0 f_~d)) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~x~0 f_~d) 2147483647) (< (+ 2147483647 f_~z~0) 0) (<= 1 f_~d) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2021-11-25 19:30:29,424 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:29,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:29,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-25 19:30:29,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142126413] [2021-11-25 19:30:29,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:29,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:30:29,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:29,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:30:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:30:29,427 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 24 states, 23 states have (on average 6.086956521739131) internal successors, (140), 24 states have internal predecessors, (140), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:29,565 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2021-11-25 19:30:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 19:30:29,566 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.086956521739131) internal successors, (140), 24 states have internal predecessors, (140), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-25 19:30:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:29,568 INFO L225 Difference]: With dead ends: 195 [2021-11-25 19:30:29,568 INFO L226 Difference]: Without dead ends: 194 [2021-11-25 19:30:29,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 184 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:30:29,570 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 189 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:29,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 188 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:30:29,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-25 19:30:29,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-11-25 19:30:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 191 states have (on average 1.1361256544502618) internal successors, (217), 192 states have internal predecessors, (217), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 219 transitions. [2021-11-25 19:30:29,577 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 219 transitions. Word has length 72 [2021-11-25 19:30:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:29,577 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 219 transitions. [2021-11-25 19:30:29,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.086956521739131) internal successors, (140), 24 states have internal predecessors, (140), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 219 transitions. [2021-11-25 19:30:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:30:29,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:29,580 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:29,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:29,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:30:29,788 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:29,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1288971928, now seen corresponding path program 4 times [2021-11-25 19:30:29,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:29,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952038756] [2021-11-25 19:30:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:29,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:30,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:30,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952038756] [2021-11-25 19:30:30,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952038756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:30,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565550289] [2021-11-25 19:30:30,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:30:30,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:30,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:30,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:30:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:30,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:30:30,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:30,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:31,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565550289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150579955] [2021-11-25 19:30:31,854 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:30:31,855 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:31,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:31,855 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:31,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:31,862 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:30:32,070 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:33,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5312#(and (<= f_~k~0 1) (<= f_~d 1) (<= 0 (+ f_~x~0 f_~d)) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~x~0 f_~d) 2147483647) (< (+ 2147483647 f_~z~0) 0) (<= 1 f_~d) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2021-11-25 19:30:33,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:33,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:33,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-25 19:30:33,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256610125] [2021-11-25 19:30:33,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:33,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 19:30:33,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:33,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 19:30:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1249, Invalid=1943, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 19:30:33,187 INFO L87 Difference]: Start difference. First operand 194 states and 219 transitions. Second operand has 48 states, 47 states have (on average 6.042553191489362) internal successors, (284), 48 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:33,491 INFO L93 Difference]: Finished difference Result 387 states and 459 transitions. [2021-11-25 19:30:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 19:30:33,492 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.042553191489362) internal successors, (284), 48 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-25 19:30:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:33,494 INFO L225 Difference]: With dead ends: 387 [2021-11-25 19:30:33,495 INFO L226 Difference]: Without dead ends: 386 [2021-11-25 19:30:33,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 376 SyntacticMatches, 23 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1249, Invalid=1943, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 19:30:33,497 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 614 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:33,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 340 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:30:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-25 19:30:33,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-25 19:30:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 383 states have (on average 1.1305483028720626) internal successors, (433), 384 states have internal predecessors, (433), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 435 transitions. [2021-11-25 19:30:33,508 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 435 transitions. Word has length 144 [2021-11-25 19:30:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:33,509 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 435 transitions. [2021-11-25 19:30:33,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.042553191489362) internal successors, (284), 48 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 435 transitions. [2021-11-25 19:30:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-25 19:30:33,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:33,521 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:33,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:33,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:30:33,748 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:33,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1050896448, now seen corresponding path program 5 times [2021-11-25 19:30:33,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199057615] [2021-11-25 19:30:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:33,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 6486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:35,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:35,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199057615] [2021-11-25 19:30:35,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199057615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:35,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662567266] [2021-11-25 19:30:35,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:30:35,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:35,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:35,184 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:35,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:30:35,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 19:30:35,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:30:35,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:30:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 6486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:36,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 6486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:39,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662567266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:39,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590994100] [2021-11-25 19:30:39,312 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:30:39,312 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:39,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:39,313 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:39,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:39,323 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:30:39,524 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:41,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7918#(and (<= f_~k~0 1) (<= f_~d 1) (<= 0 (+ f_~x~0 f_~d)) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~x~0 f_~d) 2147483647) (< (+ 2147483647 f_~z~0) 0) (<= 1 f_~d) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2021-11-25 19:30:41,527 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:41,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:41,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-25 19:30:41,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060969034] [2021-11-25 19:30:41,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:41,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-25 19:30:41,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:41,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-25 19:30:41,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4777, Invalid=6143, Unknown=0, NotChecked=0, Total=10920 [2021-11-25 19:30:41,536 INFO L87 Difference]: Start difference. First operand 386 states and 435 transitions. Second operand has 96 states, 95 states have (on average 6.021052631578947) internal successors, (572), 96 states have internal predecessors, (572), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:30:42,767 INFO L93 Difference]: Finished difference Result 771 states and 915 transitions. [2021-11-25 19:30:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-25 19:30:42,768 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 6.021052631578947) internal successors, (572), 96 states have internal predecessors, (572), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-11-25 19:30:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:30:42,772 INFO L225 Difference]: With dead ends: 771 [2021-11-25 19:30:42,773 INFO L226 Difference]: Without dead ends: 770 [2021-11-25 19:30:42,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 760 SyntacticMatches, 47 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8128 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4777, Invalid=6143, Unknown=0, NotChecked=0, Total=10920 [2021-11-25 19:30:42,778 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1026 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:30:42,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 696 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:30:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-11-25 19:30:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2021-11-25 19:30:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 767 states have (on average 1.1277705345501956) internal successors, (865), 768 states have internal predecessors, (865), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 867 transitions. [2021-11-25 19:30:42,799 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 867 transitions. Word has length 288 [2021-11-25 19:30:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:30:42,800 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 867 transitions. [2021-11-25 19:30:42,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 6.021052631578947) internal successors, (572), 96 states have internal predecessors, (572), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:30:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 867 transitions. [2021-11-25 19:30:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-11-25 19:30:42,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:30:42,817 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 94, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:30:42,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:30:43,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 19:30:43,034 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:30:43,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:30:43,035 INFO L85 PathProgramCache]: Analyzing trace with hash -417236080, now seen corresponding path program 6 times [2021-11-25 19:30:43,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:30:43,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654680067] [2021-11-25 19:30:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:30:43,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:30:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 26790 backedges. 0 proven. 26790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:47,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:47,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654680067] [2021-11-25 19:30:47,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654680067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:47,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403347214] [2021-11-25 19:30:47,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:30:47,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:47,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:47,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:47,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:30:47,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:30:47,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:30:47,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-25 19:30:47,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26790 backedges. 0 proven. 26790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:48,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 26790 backedges. 0 proven. 26790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:58,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403347214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:58,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049533649] [2021-11-25 19:30:58,802 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:30:58,803 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:58,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:58,803 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:58,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:58,828 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:30:59,023 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:31:04,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13116#(and (<= f_~k~0 1) (<= f_~d 1) (<= 0 (+ f_~x~0 f_~d)) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~x~0 f_~d) 2147483647) (< (+ 2147483647 f_~z~0) 0) (<= 1 f_~d) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2021-11-25 19:31:04,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:31:04,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:31:04,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-25 19:31:04,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878487235] [2021-11-25 19:31:04,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:31:04,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-25 19:31:04,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:31:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-25 19:31:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18745, Invalid=21455, Unknown=0, NotChecked=0, Total=40200 [2021-11-25 19:31:04,943 INFO L87 Difference]: Start difference. First operand 770 states and 867 transitions. Second operand has 192 states, 191 states have (on average 6.010471204188482) internal successors, (1148), 192 states have internal predecessors, (1148), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:31:16,142 INFO L93 Difference]: Finished difference Result 1539 states and 1827 transitions. [2021-11-25 19:31:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-25 19:31:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 6.010471204188482) internal successors, (1148), 192 states have internal predecessors, (1148), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 576 [2021-11-25 19:31:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:31:16,152 INFO L225 Difference]: With dead ends: 1539 [2021-11-25 19:31:16,152 INFO L226 Difference]: Without dead ends: 1538 [2021-11-25 19:31:16,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1822 GetRequests, 1528 SyntacticMatches, 95 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30112 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=18745, Invalid=21455, Unknown=0, NotChecked=0, Total=40200 [2021-11-25 19:31:16,158 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 2689 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2689 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:31:16,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2689 Valid, 1368 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:31:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-11-25 19:31:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1538. [2021-11-25 19:31:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1535 states have (on average 1.126384364820847) internal successors, (1729), 1536 states have internal predecessors, (1729), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 1731 transitions. [2021-11-25 19:31:16,202 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 1731 transitions. Word has length 576 [2021-11-25 19:31:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:31:16,203 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 1731 transitions. [2021-11-25 19:31:16,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 6.010471204188482) internal successors, (1148), 192 states have internal predecessors, (1148), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:31:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 1731 transitions. [2021-11-25 19:31:16,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2021-11-25 19:31:16,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:31:16,261 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 191, 191, 190, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:31:16,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:31:16,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:16,468 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:31:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:31:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash -316939728, now seen corresponding path program 7 times [2021-11-25 19:31:16,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:31:16,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621889187] [2021-11-25 19:31:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:31:16,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:31:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 108870 backedges. 0 proven. 108870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:31:31,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:31:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621889187] [2021-11-25 19:31:31,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621889187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:31:31,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397818405] [2021-11-25 19:31:31,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:31:31,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:31:31,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:31:31,417 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:31:31,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:31:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:31:31,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-25 19:31:31,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:31:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 108870 backedges. 0 proven. 108870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:31:34,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 108870 backedges. 0 proven. 108870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:13,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397818405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:13,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303265204] [2021-11-25 19:32:13,277 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:32:13,277 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:13,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:13,278 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:13,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:13,317 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:32:13,513 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:36,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23498#(and (<= f_~k~0 1) (<= f_~d 1) (<= 0 (+ f_~x~0 f_~d)) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~x~0 f_~d) 2147483647) (< (+ 2147483647 f_~z~0) 0) (<= 1 f_~d) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2021-11-25 19:32:36,315 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:36,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:36,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-25 19:32:36,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930822517] [2021-11-25 19:32:36,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:36,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-25 19:32:36,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:36,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-25 19:32:36,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74329, Invalid=79727, Unknown=0, NotChecked=0, Total=154056 [2021-11-25 19:32:36,356 INFO L87 Difference]: Start difference. First operand 1538 states and 1731 transitions. Second operand has 384 states, 383 states have (on average 6.005221932114883) internal successors, (2300), 384 states have internal predecessors, (2300), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:35:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:35:17,544 INFO L93 Difference]: Finished difference Result 3075 states and 3651 transitions. [2021-11-25 19:35:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-25 19:35:17,546 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 6.005221932114883) internal successors, (2300), 384 states have internal predecessors, (2300), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1152 [2021-11-25 19:35:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:35:17,563 INFO L225 Difference]: With dead ends: 3075 [2021-11-25 19:35:17,564 INFO L226 Difference]: Without dead ends: 3074 [2021-11-25 19:35:17,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3646 GetRequests, 3064 SyntacticMatches, 191 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115552 ImplicationChecksByTransitivity, 72.3s TimeCoverageRelationStatistics Valid=74329, Invalid=79727, Unknown=0, NotChecked=0, Total=154056 [2021-11-25 19:35:17,578 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5984 mSDsluCounter, 2704 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5984 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:35:17,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5984 Valid, 2712 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:35:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-11-25 19:35:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 3074. [2021-11-25 19:35:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 3071 states have (on average 1.1256919570172583) internal successors, (3457), 3072 states have internal predecessors, (3457), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:35:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 3459 transitions. [2021-11-25 19:35:17,657 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 3459 transitions. Word has length 1152 [2021-11-25 19:35:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:35:17,659 INFO L470 AbstractCegarLoop]: Abstraction has 3074 states and 3459 transitions. [2021-11-25 19:35:17,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 6.005221932114883) internal successors, (2300), 384 states have internal predecessors, (2300), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:35:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 3459 transitions. [2021-11-25 19:35:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2305 [2021-11-25 19:35:17,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:35:17,716 INFO L514 BasicCegarLoop]: trace histogram [383, 383, 383, 383, 383, 382, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:35:17,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:17,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:17,917 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2021-11-25 19:35:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:35:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash -653676688, now seen corresponding path program 8 times [2021-11-25 19:35:17,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:35:17,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266580133] [2021-11-25 19:35:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:35:17,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:35:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 438918 backedges. 0 proven. 438918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:12,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:36:12,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266580133] [2021-11-25 19:36:12,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266580133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:36:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336217093] [2021-11-25 19:36:12,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:36:12,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:36:12,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:36:12,329 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:36:12,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428760a5-7fc2-4ff9-8398-a06a23b655d6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:36:20,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2021-11-25 19:36:20,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:36:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 6536 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-25 19:36:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 438918 backedges. 0 proven. 438918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:25,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:39:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 438918 backedges. 0 proven. 438918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:39:09,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336217093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:39:09,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025123503] [2021-11-25 19:39:09,195 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:39:09,195 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:39:09,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:39:09,196 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:39:09,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:39:09,201 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2021-11-25 19:39:09,380 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:40:26,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44248#(and (<= f_~k~0 1) (<= f_~d 1) (<= 0 (+ f_~x~0 f_~d)) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~x~0 f_~d) 2147483647) (< (+ 2147483647 f_~z~0) 0) (<= 1 f_~d) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2021-11-25 19:40:26,968 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:40:26,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:40:26,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2021-11-25 19:40:26,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933254421] [2021-11-25 19:40:26,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:40:26,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-11-25 19:40:26,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:27,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-11-25 19:40:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296089, Invalid=306863, Unknown=0, NotChecked=0, Total=602952 [2021-11-25 19:40:27,055 INFO L87 Difference]: Start difference. First operand 3074 states and 3459 transitions. Second operand has 768 states, 767 states have (on average 6.0026075619295955) internal successors, (4604), 768 states have internal predecessors, (4604), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)