./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/TwoWay.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/TwoWay.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG --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 6e96af222dc7427442f09a30ad05a811063c14ee1b704442df6b3bb77339a035 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 04:35:17,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:35:17,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:35:17,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:35:17,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:35:17,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:35:17,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:35:17,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:35:17,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:35:17,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:35:17,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:35:17,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:35:17,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:35:17,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:35:17,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:35:17,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:35:17,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:35:17,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:35:17,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:35:17,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:35:17,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:35:17,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:35:17,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:35:17,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:35:17,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:35:17,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:35:17,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:35:17,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:35:17,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:35:17,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:35:17,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:35:17,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:35:17,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:35:17,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:35:17,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:35:17,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:35:17,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:35:17,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:35:17,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:35:17,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:35:17,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:35:17,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-29 04:35:18,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:35:18,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:35:18,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:35:18,009 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:35:18,009 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:35:18,010 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:35:18,010 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 04:35:18,018 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:35:18,018 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:35:18,019 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 04:35:18,020 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 04:35:18,020 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:35:18,021 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 04:35:18,021 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 04:35:18,021 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 04:35:18,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:35:18,023 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 04:35:18,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 04:35:18,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:35:18,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 04:35:18,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:35:18,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 04:35:18,024 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-29 04:35:18,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 04:35:18,025 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:35:18,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 04:35:18,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:35:18,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:35:18,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:35:18,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:35:18,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:35:18,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 04:35:18,027 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 04:35:18,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 04:35:18,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 04:35:18,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:35:18,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:35:18,029 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_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e96af222dc7427442f09a30ad05a811063c14ee1b704442df6b3bb77339a035 [2021-10-29 04:35:18,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:35:18,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:35:18,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:35:18,373 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:35:18,374 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:35:18,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/termination-numeric/TwoWay.c [2021-10-29 04:35:18,460 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/data/dc4183cd6/ab6529d3362541689cac1f2f0f5eba88/FLAG4eb9b1081 [2021-10-29 04:35:19,030 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:35:19,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/sv-benchmarks/c/termination-numeric/TwoWay.c [2021-10-29 04:35:19,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/data/dc4183cd6/ab6529d3362541689cac1f2f0f5eba88/FLAG4eb9b1081 [2021-10-29 04:35:19,391 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/data/dc4183cd6/ab6529d3362541689cac1f2f0f5eba88 [2021-10-29 04:35:19,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:35:19,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:35:19,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:35:19,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:35:19,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:35:19,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc33d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19, skipping insertion in model container [2021-10-29 04:35:19,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:35:19,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:35:19,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:35:19,604 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:35:19,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:35:19,665 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:35:19,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19 WrapperNode [2021-10-29 04:35:19,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:35:19,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:35:19,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:35:19,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:35:19,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:35:19,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:35:19,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:35:19,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:35:19,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:35:19,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:35:19,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:35:19,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:35:19,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (1/1) ... [2021-10-29 04:35:19,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:35:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:35:19,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:35:19,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:35:19,849 INFO L130 BoogieDeclarations]: Found specification of procedure twoWay [2021-10-29 04:35:19,849 INFO L138 BoogieDeclarations]: Found implementation of procedure twoWay [2021-10-29 04:35:19,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:35:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:35:20,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:35:20,156 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-29 04:35:20,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:35:20 BoogieIcfgContainer [2021-10-29 04:35:20,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:35:20,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:35:20,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:35:20,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:35:20,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:35:19" (1/3) ... [2021-10-29 04:35:20,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a80f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:35:20, skipping insertion in model container [2021-10-29 04:35:20,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:35:19" (2/3) ... [2021-10-29 04:35:20,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a80f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:35:20, skipping insertion in model container [2021-10-29 04:35:20,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:35:20" (3/3) ... [2021-10-29 04:35:20,187 INFO L111 eAbstractionObserver]: Analyzing ICFG TwoWay.c [2021-10-29 04:35:20,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:35:20,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-29 04:35:20,315 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:35:20,323 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 [2021-10-29 04:35:20,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-29 04:35:20,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-29 04:35:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 04:35:20,372 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:20,372 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:20,373 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-29 04:35:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:20,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1734939443, now seen corresponding path program 1 times [2021-10-29 04:35:20,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:20,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443848808] [2021-10-29 04:35:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:20,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:20,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:20,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443848808] [2021-10-29 04:35:20,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443848808] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:20,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:20,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 04:35:20,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737702034] [2021-10-29 04:35:20,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 04:35:20,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:20,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 04:35:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-29 04:35:20,722 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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) [2021-10-29 04:35:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:20,945 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-10-29 04:35:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 04:35:20,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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 [2021-10-29 04:35:20,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:20,959 INFO L225 Difference]: With dead ends: 55 [2021-10-29 04:35:20,959 INFO L226 Difference]: Without dead ends: 51 [2021-10-29 04:35:20,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-29 04:35:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-29 04:35:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-10-29 04:35:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.6) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-29 04:35:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-10-29 04:35:21,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 8 [2021-10-29 04:35:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:21,019 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-10-29 04:35:21,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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) [2021-10-29 04:35:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-10-29 04:35:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 04:35:21,020 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:21,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:21,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 04:35:21,021 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-29 04:35:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:21,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1734939635, now seen corresponding path program 1 times [2021-10-29 04:35:21,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:21,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699916429] [2021-10-29 04:35:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:21,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:21,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:21,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699916429] [2021-10-29 04:35:21,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699916429] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:21,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:21,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 04:35:21,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668561219] [2021-10-29 04:35:21,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:21,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:21,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:21,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:21,075 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 4 states, 4 states have (on average 1.75) 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) [2021-10-29 04:35:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:21,098 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-10-29 04:35:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:21,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) 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 [2021-10-29 04:35:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:21,100 INFO L225 Difference]: With dead ends: 45 [2021-10-29 04:35:21,100 INFO L226 Difference]: Without dead ends: 18 [2021-10-29 04:35:21,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 04:35:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-29 04:35:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-29 04:35:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 04:35:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-29 04:35:21,108 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-10-29 04:35:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:21,108 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-29 04:35:21,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) 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) [2021-10-29 04:35:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-29 04:35:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 04:35:21,110 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:21,110 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:21,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 04:35:21,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-29 04:35:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2051452074, now seen corresponding path program 1 times [2021-10-29 04:35:21,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:21,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654229934] [2021-10-29 04:35:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:21,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:35:21,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:21,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654229934] [2021-10-29 04:35:21,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654229934] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:21,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:21,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 04:35:21,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568410053] [2021-10-29 04:35:21,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:35:21,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:35:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:35:21,161 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-10-29 04:35:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:21,185 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-29 04:35:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:35:21,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2021-10-29 04:35:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:21,187 INFO L225 Difference]: With dead ends: 18 [2021-10-29 04:35:21,188 INFO L226 Difference]: Without dead ends: 17 [2021-10-29 04:35:21,188 INFO L786 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 [2021-10-29 04:35:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-29 04:35:21,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-29 04:35:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 04:35:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-29 04:35:21,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-10-29 04:35:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:21,194 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-29 04:35:21,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-10-29 04:35:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-29 04:35:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 04:35:21,195 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:21,195 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:21,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 04:35:21,196 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-29 04:35:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2048642091, now seen corresponding path program 1 times [2021-10-29 04:35:21,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:21,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068828700] [2021-10-29 04:35:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:21,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:21,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:35:21,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012855388] [2021-10-29 04:35:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:21,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:35:21,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:35:21,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:35:21,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 04:35:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:21,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 04:35:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:35:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 04:35:21,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:35:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 04:35:22,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:22,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068828700] [2021-10-29 04:35:22,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:35:22,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012855388] [2021-10-29 04:35:22,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012855388] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:22,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:22,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-29 04:35:22,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49221089] [2021-10-29 04:35:22,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 04:35:22,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:22,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 04:35:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-29 04:35:22,204 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-29 04:35:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:22,317 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-29 04:35:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 04:35:22,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-10-29 04:35:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:22,321 INFO L225 Difference]: With dead ends: 24 [2021-10-29 04:35:22,321 INFO L226 Difference]: Without dead ends: 23 [2021-10-29 04:35:22,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-29 04:35:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-29 04:35:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-10-29 04:35:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-29 04:35:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-29 04:35:22,337 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-10-29 04:35:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:22,337 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-29 04:35:22,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-29 04:35:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-29 04:35:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-29 04:35:22,340 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:22,341 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:22,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 04:35:22,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:35:22,557 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-29 04:35:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash -916604565, now seen corresponding path program 1 times [2021-10-29 04:35:22,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:22,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897532657] [2021-10-29 04:35:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:22,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:22,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:35:22,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984744909] [2021-10-29 04:35:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:22,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:35:22,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:35:22,580 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:35:22,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 04:35:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:22,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 04:35:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:35:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 04:35:22,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:35:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 04:35:23,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:23,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897532657] [2021-10-29 04:35:23,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:35:23,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984744909] [2021-10-29 04:35:23,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984744909] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:35:23,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:35:23,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-10-29 04:35:23,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707045328] [2021-10-29 04:35:23,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-29 04:35:23,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:23,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-29 04:35:23,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-29 04:35:23,062 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 13 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-29 04:35:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:23,239 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-10-29 04:35:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 04:35:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-10-29 04:35:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:23,241 INFO L225 Difference]: With dead ends: 23 [2021-10-29 04:35:23,241 INFO L226 Difference]: Without dead ends: 22 [2021-10-29 04:35:23,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-29 04:35:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-29 04:35:23,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-29 04:35:23,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-29 04:35:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-29 04:35:23,247 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-10-29 04:35:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:23,248 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-29 04:35:23,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-29 04:35:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-29 04:35:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-29 04:35:23,250 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:23,250 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:23,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 04:35:23,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:35:23,451 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-29 04:35:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:23,451 INFO L85 PathProgramCache]: Analyzing trace with hash 37921722, now seen corresponding path program 1 times [2021-10-29 04:35:23,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:23,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039698794] [2021-10-29 04:35:23,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:23,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:23,472 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:35:23,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831088444] [2021-10-29 04:35:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:23,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:35:23,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:35:23,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:35:23,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 04:35:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:23,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 04:35:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:35:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 04:35:24,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:35:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 04:35:25,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:25,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039698794] [2021-10-29 04:35:25,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:35:25,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831088444] [2021-10-29 04:35:25,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831088444] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:35:25,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274819547] [2021-10-29 04:35:25,911 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-29 04:35:25,911 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:35:25,917 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-29 04:35:25,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 04:35:25,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-29 04:35:25,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708485139] [2021-10-29 04:35:25,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-29 04:35:25,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:25,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-29 04:35:25,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-29 04:35:25,923 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-29 04:35:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:27,540 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-10-29 04:35:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 04:35:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-10-29 04:35:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:27,542 INFO L225 Difference]: With dead ends: 28 [2021-10-29 04:35:27,543 INFO L226 Difference]: Without dead ends: 27 [2021-10-29 04:35:27,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-10-29 04:35:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-29 04:35:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-10-29 04:35:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-29 04:35:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-29 04:35:27,549 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 27 [2021-10-29 04:35:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:27,550 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-29 04:35:27,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-29 04:35:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-29 04:35:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-29 04:35:27,552 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:27,552 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:27,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 04:35:27,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-29 04:35:27,767 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-29 04:35:27,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:27,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2097168606, now seen corresponding path program 1 times [2021-10-29 04:35:27,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:27,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966859993] [2021-10-29 04:35:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:27,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:27,805 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:35:27,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924247699] [2021-10-29 04:35:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:27,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:35:27,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:35:27,815 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:35:27,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 04:35:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:35:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-29 04:35:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:35:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-29 04:35:29,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:35:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-29 04:35:46,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:46,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966859993] [2021-10-29 04:35:46,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:35:46,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924247699] [2021-10-29 04:35:46,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924247699] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:35:46,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1578551462] [2021-10-29 04:35:46,105 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-29 04:35:46,106 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:35:46,106 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-29 04:35:46,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 04:35:46,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-10-29 04:35:46,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309533651] [2021-10-29 04:35:46,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-29 04:35:46,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:46,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-29 04:35:46,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-10-29 04:35:46,111 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-29 04:35:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:49,873 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-29 04:35:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 04:35:49,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-10-29 04:35:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:49,875 INFO L225 Difference]: With dead ends: 29 [2021-10-29 04:35:49,875 INFO L226 Difference]: Without dead ends: 28 [2021-10-29 04:35:49,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-10-29 04:35:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-29 04:35:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-10-29 04:35:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-29 04:35:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-29 04:35:49,881 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 34 [2021-10-29 04:35:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:49,882 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-29 04:35:49,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-29 04:35:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-29 04:35:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-29 04:35:49,884 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:35:49,885 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:49,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 04:35:50,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:35:50,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-29 04:35:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:35:50,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1355949953, now seen corresponding path program 2 times [2021-10-29 04:35:50,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:35:50,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271304145] [2021-10-29 04:35:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:35:50,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:35:50,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 04:35:50,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534675415] [2021-10-29 04:35:50,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 04:35:50,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:35:50,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:35:50,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:35:50,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 04:35:50,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-29 04:35:50,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 04:35:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-29 04:35:50,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:35:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-29 04:35:51,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:35:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-29 04:35:53,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:35:53,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271304145] [2021-10-29 04:35:53,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 04:35:53,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534675415] [2021-10-29 04:35:53,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534675415] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:35:53,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176205503] [2021-10-29 04:35:53,220 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-29 04:35:53,220 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:35:53,220 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-29 04:35:53,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 04:35:53,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-10-29 04:35:53,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130285393] [2021-10-29 04:35:53,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-29 04:35:53,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:35:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-29 04:35:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-10-29 04:35:53,224 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-29 04:35:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:35:53,641 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-29 04:35:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 04:35:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-10-29 04:35:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:35:53,643 INFO L225 Difference]: With dead ends: 28 [2021-10-29 04:35:53,643 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 04:35:53,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-10-29 04:35:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 04:35:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 04:35:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:35:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 04:35:53,645 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2021-10-29 04:35:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:35:53,645 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 04:35:53,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-29 04:35:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 04:35:53,646 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 04:35:53,649 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 04:35:53,650 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 04:35:53,650 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 04:35:53,650 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 04:35:53,650 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 04:35:53,651 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 04:35:53,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 04:35:53,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:35:53,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-29 04:35:53,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:35:53,959 INFO L857 garLoopResultBuilder]: For program point L31(lines 31 35) no Hoare annotation was computed. [2021-10-29 04:35:53,959 INFO L853 garLoopResultBuilder]: At program point L31-2(lines 31 35) the Hoare annotation is: (or (not (<= 1 |twoWay_#in~terminate|)) (and (<= 1 twoWay_~terminate) (<= twoWay_~m~0 2147483647) (<= |twoWay_#in~n| (+ 1 twoWay_~m~0)) (<= |twoWay_#in~n| twoWay_~n) (<= twoWay_~n |twoWay_#in~n|) (<= 0 |twoWay_#in~n|)) (not (<= |twoWay_#in~n| 2147483647))) [2021-10-29 04:35:53,960 INFO L857 garLoopResultBuilder]: For program point L27(lines 27 37) no Hoare annotation was computed. [2021-10-29 04:35:53,960 INFO L857 garLoopResultBuilder]: For program point twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2021-10-29 04:35:53,962 INFO L857 garLoopResultBuilder]: For program point twoWayFINAL(lines 26 38) no Hoare annotation was computed. [2021-10-29 04:35:53,962 INFO L857 garLoopResultBuilder]: For program point twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2021-10-29 04:35:53,963 INFO L857 garLoopResultBuilder]: For program point twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2021-10-29 04:35:53,963 INFO L857 garLoopResultBuilder]: For program point L36(line 36) no Hoare annotation was computed. [2021-10-29 04:35:53,963 INFO L857 garLoopResultBuilder]: For program point L36-1(line 36) no Hoare annotation was computed. [2021-10-29 04:35:53,963 INFO L857 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2021-10-29 04:35:53,963 INFO L857 garLoopResultBuilder]: For program point L36-2(line 36) no Hoare annotation was computed. [2021-10-29 04:35:53,964 INFO L857 garLoopResultBuilder]: For program point L34-1(line 34) no Hoare annotation was computed. [2021-10-29 04:35:53,979 INFO L857 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-10-29 04:35:53,979 INFO L857 garLoopResultBuilder]: For program point L32-1(line 32) no Hoare annotation was computed. [2021-10-29 04:35:53,979 INFO L860 garLoopResultBuilder]: At program point twoWayENTRY(lines 26 38) the Hoare annotation is: true [2021-10-29 04:35:53,979 INFO L857 garLoopResultBuilder]: For program point twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2021-10-29 04:35:53,980 INFO L857 garLoopResultBuilder]: For program point twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2021-10-29 04:35:53,980 INFO L857 garLoopResultBuilder]: For program point twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2021-10-29 04:35:53,980 INFO L857 garLoopResultBuilder]: For program point twoWayEXIT(lines 26 38) no Hoare annotation was computed. [2021-10-29 04:35:53,980 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-29 04:35:53,980 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-29 04:35:53,981 INFO L853 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2021-10-29 04:35:53,981 INFO L857 garLoopResultBuilder]: For program point L48-1(line 48) no Hoare annotation was computed. [2021-10-29 04:35:53,981 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 46) no Hoare annotation was computed. [2021-10-29 04:35:53,981 INFO L857 garLoopResultBuilder]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-10-29 04:35:53,981 INFO L853 garLoopResultBuilder]: At program point L40(lines 40 50) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2021-10-29 04:35:53,986 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2021-10-29 04:35:53,988 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:35:54,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:35:54 BoogieIcfgContainer [2021-10-29 04:35:54,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:35:54,004 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:35:54,004 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:35:54,004 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:35:54,005 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:35:20" (3/4) ... [2021-10-29 04:35:54,008 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 04:35:54,016 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure twoWay [2021-10-29 04:35:54,021 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-29 04:35:54,022 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-29 04:35:54,062 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 04:35:54,062 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:35:54,064 INFO L168 Benchmark]: Toolchain (without parser) took 34667.14 ms. Allocated memory was 81.8 MB in the beginning and 119.5 MB in the end (delta: 37.7 MB). Free memory was 47.3 MB in the beginning and 49.6 MB in the end (delta: -2.3 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:54,065 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 81.8 MB. Free memory was 60.2 MB in the beginning and 60.2 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:35:54,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.29 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 47.0 MB in the beginning and 76.4 MB in the end (delta: -29.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:54,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.07 ms. Allocated memory is still 98.6 MB. Free memory was 76.4 MB in the beginning and 75.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:35:54,067 INFO L168 Benchmark]: Boogie Preprocessor took 21.27 ms. Allocated memory is still 98.6 MB. Free memory was 75.0 MB in the beginning and 74.2 MB in the end (delta: 807.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:35:54,067 INFO L168 Benchmark]: RCFGBuilder took 431.85 ms. Allocated memory is still 98.6 MB. Free memory was 74.2 MB in the beginning and 64.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:54,068 INFO L168 Benchmark]: TraceAbstraction took 33840.93 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 64.3 MB in the beginning and 51.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:54,068 INFO L168 Benchmark]: Witness Printer took 58.91 ms. Allocated memory is still 119.5 MB. Free memory was 51.7 MB in the beginning and 49.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:35:54,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 81.8 MB. Free memory was 60.2 MB in the beginning and 60.2 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.29 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 47.0 MB in the beginning and 76.4 MB in the end (delta: -29.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.07 ms. Allocated memory is still 98.6 MB. Free memory was 76.4 MB in the beginning and 75.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.27 ms. Allocated memory is still 98.6 MB. Free memory was 75.0 MB in the beginning and 74.2 MB in the end (delta: 807.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 431.85 ms. Allocated memory is still 98.6 MB. Free memory was 74.2 MB in the beginning and 64.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 33840.93 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 64.3 MB in the beginning and 51.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. * Witness Printer took 58.91 ms. Allocated memory is still 119.5 MB. Free memory was 51.7 MB in the beginning and 49.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 33.6s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 279 SDslu, 382 SDs, 0 SdLazy, 615 SolverSat, 110 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 312 GetRequests, 185 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 11.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=1, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 24 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 37 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 24.8s InterpolantComputationTime, 158 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 278 ConstructedInterpolants, 47 QuantifiedInterpolants, 1591 SizeOfPredicates, 25 NumberOfNonLiveVariables, 394 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 122/172 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x <= 2147483647 RESULT: Ultimate proved your program to be correct! [2021-10-29 04:35:54,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c7f312-5fbc-4cda-8630-fddbc549b9f5/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...