./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V --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 d69e4513fb8989bf305d8f9ce21862e8623f2a3d0c8146e8e7fb7e8c658a7eff --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:04:07,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:04:07,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:04:07,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:04:07,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:04:07,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:04:07,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:04:07,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:04:07,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:04:07,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:04:07,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:04:07,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:04:07,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:04:07,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:04:07,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:04:07,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:04:07,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:04:07,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:04:07,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:04:07,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:04:07,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:04:07,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:04:07,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:04:07,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:04:07,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:04:07,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:04:07,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:04:07,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:04:07,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:04:07,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:04:07,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:04:07,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:04:07,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:04:07,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:04:07,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:04:07,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:04:07,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:04:07,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:04:07,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:04:07,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:04:07,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:04:07,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-23 03:04:07,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:04:07,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:04:07,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:04:07,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:04:07,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:04:07,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:04:07,942 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:04:07,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:04:07,943 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:04:07,943 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:04:07,944 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:04:07,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:04:07,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:04:07,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:04:07,946 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:04:07,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:04:07,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:04:07,946 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:04:07,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:04:07,948 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:04:07,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:04:07,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:04:07,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:04:07,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:04:07,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:04:07,949 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-23 03:04:07,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:04:07,951 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:04:07,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:04:07,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:04:07,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:04:07,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:04:07,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:04:07,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:04:07,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:04:07,954 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:04:07,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:04:07,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:04:07,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:04:07,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:04:07,955 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_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d69e4513fb8989bf305d8f9ce21862e8623f2a3d0c8146e8e7fb7e8c658a7eff [2021-11-23 03:04:08,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:04:08,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:04:08,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:04:08,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:04:08,384 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:04:08,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2021-11-23 03:04:08,484 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/data/d9f656367/9e77717c05ea49c59b443a9787e28fc8/FLAG3f010c146 [2021-11-23 03:04:09,151 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:04:09,152 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2021-11-23 03:04:09,165 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/data/d9f656367/9e77717c05ea49c59b443a9787e28fc8/FLAG3f010c146 [2021-11-23 03:04:09,506 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/data/d9f656367/9e77717c05ea49c59b443a9787e28fc8 [2021-11-23 03:04:09,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:04:09,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:04:09,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:04:09,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:04:09,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:04:09,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:09,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267354f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09, skipping insertion in model container [2021-11-23 03:04:09,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:09,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:04:09,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:04:09,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:04:09,848 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:04:09,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:04:09,898 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:04:09,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09 WrapperNode [2021-11-23 03:04:09,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:04:09,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:04:09,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:04:09,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:04:09,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:09,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:09,956 INFO L137 Inliner]: procedures = 8, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2021-11-23 03:04:09,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:04:09,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:04:09,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:04:09,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:04:09,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:09,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:09,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:09,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:09,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:10,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:10,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:10,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:04:10,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:04:10,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:04:10,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:04:10,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (1/1) ... [2021-11-23 03:04:10,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:04:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:10,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:04:10,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:04:10,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:04:10,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:04:10,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:04:10,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:04:10,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:04:10,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:04:10,219 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:04:10,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:04:10,436 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:04:10,493 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:04:10,508 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:04:10,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:10 BoogieIcfgContainer [2021-11-23 03:04:10,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:04:10,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:04:10,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:04:10,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:04:10,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:04:09" (1/3) ... [2021-11-23 03:04:10,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf94de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:10, skipping insertion in model container [2021-11-23 03:04:10,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:09" (2/3) ... [2021-11-23 03:04:10,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf94de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:10, skipping insertion in model container [2021-11-23 03:04:10,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:10" (3/3) ... [2021-11-23 03:04:10,524 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Array-1.c [2021-11-23 03:04:10,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:04:10,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-23 03:04:10,653 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:04:10,667 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:04:10,667 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-23 03:04:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:04:10,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:10,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:04:10,709 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:10,717 INFO L85 PathProgramCache]: Analyzing trace with hash 86379, now seen corresponding path program 1 times [2021-11-23 03:04:10,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:10,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076911531] [2021-11-23 03:04:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:10,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:10,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:10,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076911531] [2021-11-23 03:04:10,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076911531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:04:10,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:04:10,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:04:10,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801200718] [2021-11-23 03:04:10,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:04:10,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:04:10,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:04:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:04:10,983 INFO L87 Difference]: Start difference. First operand has 19 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:11,049 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-11-23 03:04:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:04:11,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 03:04:11,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:11,061 INFO L225 Difference]: With dead ends: 37 [2021-11-23 03:04:11,062 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:04:11,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:04:11,070 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:11,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:04:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:04:11,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 03:04:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-23 03:04:11,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 3 [2021-11-23 03:04:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:11,112 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-23 03:04:11,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-23 03:04:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:04:11,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:11,114 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-11-23 03:04:11,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:04:11,115 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:11,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1721603529, now seen corresponding path program 1 times [2021-11-23 03:04:11,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:11,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647679203] [2021-11-23 03:04:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:11,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:04:11,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:11,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647679203] [2021-11-23 03:04:11,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647679203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:04:11,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:04:11,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:04:11,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422050939] [2021-11-23 03:04:11,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:04:11,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:04:11,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:04:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:04:11,167 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:11,199 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-23 03:04:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:04:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 03:04:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:11,202 INFO L225 Difference]: With dead ends: 20 [2021-11-23 03:04:11,203 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 03:04:11,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:04:11,207 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:11,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:04:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 03:04:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 03:04:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.5) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 03:04:11,219 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2021-11-23 03:04:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:11,222 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 03:04:11,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 03:04:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:04:11,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:11,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2021-11-23 03:04:11,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:04:11,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1830101801, now seen corresponding path program 1 times [2021-11-23 03:04:11,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:11,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389627900] [2021-11-23 03:04:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:11,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:11,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:11,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389627900] [2021-11-23 03:04:11,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389627900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:04:11,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479002151] [2021-11-23 03:04:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:11,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:11,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:11,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:04:11,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:04:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:04:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:04:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:11,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:04:11,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479002151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:04:11,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:04:11,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 03:04:11,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039227968] [2021-11-23 03:04:11,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:04:11,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:04:11,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:04:11,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:04:11,549 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:11,601 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-23 03:04:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:04:11,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:04:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:11,603 INFO L225 Difference]: With dead ends: 19 [2021-11-23 03:04:11,603 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 03:04:11,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:04:11,628 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:11,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:04:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 03:04:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-11-23 03:04:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-23 03:04:11,635 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 7 [2021-11-23 03:04:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:11,635 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-23 03:04:11,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-23 03:04:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:04:11,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:11,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:04:11,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:04:11,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:11,862 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:11,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2081092992, now seen corresponding path program 1 times [2021-11-23 03:04:11,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:11,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451161298] [2021-11-23 03:04:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:11,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:11,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451161298] [2021-11-23 03:04:11,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451161298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:04:11,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886113194] [2021-11-23 03:04:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:11,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:11,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:11,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:04:11,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:04:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:12,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:04:12,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:04:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:12,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:04:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:12,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886113194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:04:12,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521180561] [2021-11-23 03:04:12,186 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:04:12,186 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:04:12,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:04:12,200 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:04:12,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:04:12,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:04:12,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:04:12,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:12,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 35 [2021-11-23 03:04:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:12,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:12,697 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-23 03:04:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 149 [2021-11-23 03:04:12,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:13,059 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:04:13,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [521180561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:04:13,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:04:13,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 16 [2021-11-23 03:04:13,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587490199] [2021-11-23 03:04:13,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:04:13,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:04:13,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:04:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:04:13,441 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:13,683 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-11-23 03:04:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:04:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:04:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:13,685 INFO L225 Difference]: With dead ends: 27 [2021-11-23 03:04:13,687 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 03:04:13,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:04:13,690 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:13,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 30 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:04:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 03:04:13,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-11-23 03:04:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-23 03:04:13,710 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2021-11-23 03:04:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:13,711 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-23 03:04:13,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-23 03:04:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:04:13,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:13,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:04:13,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:04:13,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:13,942 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2081092800, now seen corresponding path program 1 times [2021-11-23 03:04:13,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:13,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198852015] [2021-11-23 03:04:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:13,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:13,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198852015] [2021-11-23 03:04:13,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198852015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:04:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017536732] [2021-11-23 03:04:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:13,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:13,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:13,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:04:14,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:04:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:14,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:04:14,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:04:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:14,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:04:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017536732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:04:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042185175] [2021-11-23 03:04:14,146 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:04:14,146 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:04:14,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:04:14,146 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:04:14,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:04:14,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:04:14,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:04:14,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:14,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2021-11-23 03:04:14,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:14,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:14,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:14,449 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-23 03:04:14,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 160 [2021-11-23 03:04:14,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:14,667 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:04:15,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '385#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (< 2147483648 |ULTIMATE.start_main_#t~post7#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_#t~post7#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:04:15,168 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:04:15,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:04:15,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-23 03:04:15,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188494802] [2021-11-23 03:04:15,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:04:15,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:04:15,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:04:15,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:04:15,170 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:15,232 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-11-23 03:04:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:04:15,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:04:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:15,234 INFO L225 Difference]: With dead ends: 47 [2021-11-23 03:04:15,234 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 03:04:15,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:04:15,236 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:15,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:04:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 03:04:15,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 03:04:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-23 03:04:15,244 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 9 [2021-11-23 03:04:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:15,244 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-23 03:04:15,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-23 03:04:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:04:15,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:15,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-23 03:04:15,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:04:15,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:15,465 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:15,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2122016704, now seen corresponding path program 2 times [2021-11-23 03:04:15,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:15,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450201594] [2021-11-23 03:04:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:15,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:15,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450201594] [2021-11-23 03:04:15,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450201594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:04:15,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12589760] [2021-11-23 03:04:15,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:04:15,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:15,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:04:15,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:04:15,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:04:15,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:04:15,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:04:15,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:04:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:15,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:04:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:15,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12589760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:04:15,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27466546] [2021-11-23 03:04:15,889 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:04:15,889 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:04:15,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:04:15,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:04:15,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:04:15,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:04:15,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:04:15,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:15,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 35 [2021-11-23 03:04:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:16,137 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-23 03:04:16,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 150 [2021-11-23 03:04:16,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:16,268 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:04:16,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '583#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (< 2147483648 |ULTIMATE.start_main_#t~post7#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_#t~post7#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:04:16,729 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:04:16,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:04:16,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-23 03:04:16,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079296116] [2021-11-23 03:04:16,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:04:16,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:04:16,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:04:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:04:16,732 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:16,886 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2021-11-23 03:04:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:04:16,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 03:04:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:16,892 INFO L225 Difference]: With dead ends: 59 [2021-11-23 03:04:16,892 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 03:04:16,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:04:16,895 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:16,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 56 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:04:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 03:04:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-23 03:04:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-23 03:04:16,912 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 15 [2021-11-23 03:04:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:16,912 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-23 03:04:16,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-23 03:04:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:04:16,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:16,915 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-23 03:04:16,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:04:17,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:04:17,129 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash -431357760, now seen corresponding path program 3 times [2021-11-23 03:04:17,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:17,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779075600] [2021-11-23 03:04:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:17,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:17,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:17,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779075600] [2021-11-23 03:04:17,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779075600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:04:17,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984355172] [2021-11-23 03:04:17,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:04:17,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:17,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:04:17,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:04:17,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:04:17,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:04:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:04:17,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:04:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:17,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:04:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:17,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984355172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:04:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103031519] [2021-11-23 03:04:17,894 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:04:17,894 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:04:17,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:04:17,895 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:04:17,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:04:17,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:04:17,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:04:17,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:17,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:17,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2021-11-23 03:04:18,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:18,099 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-23 03:04:18,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 149 [2021-11-23 03:04:18,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:18,258 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:04:18,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '909#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (< 2147483648 |ULTIMATE.start_main_#t~post7#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_#t~post7#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:04:18,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:04:18,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:04:18,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-11-23 03:04:18,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514881186] [2021-11-23 03:04:18,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:04:18,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 03:04:18,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:18,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 03:04:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 03:04:18,745 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:19,105 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-11-23 03:04:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 03:04:19,108 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 03:04:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:19,109 INFO L225 Difference]: With dead ends: 83 [2021-11-23 03:04:19,109 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 03:04:19,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=686, Invalid=2394, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 03:04:19,112 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:19,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 78 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:04:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 03:04:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-23 03:04:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 64 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-11-23 03:04:19,140 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 27 [2021-11-23 03:04:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:19,141 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-11-23 03:04:19,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-11-23 03:04:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 03:04:19,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:19,144 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-23 03:04:19,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:04:19,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:19,370 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:19,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1815170368, now seen corresponding path program 4 times [2021-11-23 03:04:19,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:19,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387872838] [2021-11-23 03:04:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:19,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:19,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:19,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387872838] [2021-11-23 03:04:19,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387872838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:04:19,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591780895] [2021-11-23 03:04:19,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:04:19,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:19,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:19,967 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:04:19,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:04:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:20,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 03:04:20,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:04:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:20,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:04:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:21,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591780895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:04:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [45801954] [2021-11-23 03:04:21,309 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:04:21,310 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:04:21,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:04:21,310 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:04:21,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:04:21,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:04:21,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:04:21,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:21,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:21,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 35 [2021-11-23 03:04:21,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:21,496 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-23 03:04:21,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 149 [2021-11-23 03:04:21,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:21,629 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:04:22,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1491#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (< 2147483648 |ULTIMATE.start_main_#t~post7#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_#t~post7#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:04:22,057 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:04:22,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:04:22,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 65 [2021-11-23 03:04:22,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213566401] [2021-11-23 03:04:22,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:04:22,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-23 03:04:22,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-23 03:04:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1149, Invalid=4253, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 03:04:22,064 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 66 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 65 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:23,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:23,107 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2021-11-23 03:04:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-23 03:04:23,108 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 65 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 03:04:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:23,109 INFO L225 Difference]: With dead ends: 131 [2021-11-23 03:04:23,109 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 03:04:23,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2895 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2622, Invalid=8090, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 03:04:23,116 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:23,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 122 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:04:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 03:04:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-23 03:04:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.0825688073394495) internal successors, (118), 112 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2021-11-23 03:04:23,132 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 51 [2021-11-23 03:04:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:23,133 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2021-11-23 03:04:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 65 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2021-11-23 03:04:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 03:04:23,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:23,138 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1] [2021-11-23 03:04:23,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:04:23,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:23,353 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1299584704, now seen corresponding path program 5 times [2021-11-23 03:04:23,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130963031] [2021-11-23 03:04:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:23,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:25,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:25,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130963031] [2021-11-23 03:04:25,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130963031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:04:25,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230050618] [2021-11-23 03:04:25,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:04:25,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:25,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:25,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:04:25,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:04:41,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-23 03:04:41,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:04:41,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 03:04:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:04:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:41,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:04:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:45,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230050618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:04:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604414666] [2021-11-23 03:04:45,340 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:04:45,341 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:04:45,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:04:45,341 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:04:45,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:04:45,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:04:45,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:04:45,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:45,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:45,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 35 [2021-11-23 03:04:45,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:45,525 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-23 03:04:45,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 149 [2021-11-23 03:04:45,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:04:45,647 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:04:46,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2585#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (< 2147483648 |ULTIMATE.start_main_#t~post7#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_#t~post7#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:04:46,338 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:04:46,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:04:46,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 129 [2021-11-23 03:04:46,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428772868] [2021-11-23 03:04:46,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:04:46,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-23 03:04:46,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-23 03:04:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4317, Invalid=14589, Unknown=0, NotChecked=0, Total=18906 [2021-11-23 03:04:46,350 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand has 130 states, 130 states have (on average 1.523076923076923) internal successors, (198), 129 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:49,212 INFO L93 Difference]: Finished difference Result 227 states and 268 transitions. [2021-11-23 03:04:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-23 03:04:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.523076923076923) internal successors, (198), 129 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 03:04:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:49,217 INFO L225 Difference]: With dead ends: 227 [2021-11-23 03:04:49,217 INFO L226 Difference]: Without dead ends: 209 [2021-11-23 03:04:49,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9919 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=10334, Invalid=29466, Unknown=0, NotChecked=0, Total=39800 [2021-11-23 03:04:49,226 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 464 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:49,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 133 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:04:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-23 03:04:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-23 03:04:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 205 states have (on average 1.0439024390243903) internal successors, (214), 208 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 214 transitions. [2021-11-23 03:04:49,272 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 214 transitions. Word has length 99 [2021-11-23 03:04:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:49,273 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 214 transitions. [2021-11-23 03:04:49,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.523076923076923) internal successors, (198), 129 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:04:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 214 transitions. [2021-11-23 03:04:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-23 03:04:49,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:49,291 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1] [2021-11-23 03:04:49,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:04:49,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:49,492 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:04:49,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:49,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1933369024, now seen corresponding path program 6 times [2021-11-23 03:04:49,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:49,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013122094] [2021-11-23 03:04:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:49,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:54,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:54,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013122094] [2021-11-23 03:04:54,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013122094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:04:54,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333325507] [2021-11-23 03:04:54,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:04:54,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:54,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:54,499 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:04:54,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:04:54,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:04:54,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:04:54,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-23 03:04:54,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:04:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:04:55,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:05:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:05:07,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333325507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:05:07,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065502556] [2021-11-23 03:05:07,174 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:05:07,174 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:05:07,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:05:07,174 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:05:07,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:05:07,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:05:07,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:05:07,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:05:07,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:07,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2021-11-23 03:05:07,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:07,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:07,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:07,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 155 [2021-11-23 03:05:07,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:05:07,438 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:05:08,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4703#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (< 2147483648 |ULTIMATE.start_main_#t~post7#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_#t~post7#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:05:08,436 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:05:08,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:05:08,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 257 [2021-11-23 03:05:08,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884038949] [2021-11-23 03:05:08,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:05:08,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 258 states [2021-11-23 03:05:08,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:05:08,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 258 interpolants. [2021-11-23 03:05:08,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16797, Invalid=53693, Unknown=0, NotChecked=0, Total=70490 [2021-11-23 03:05:08,449 INFO L87 Difference]: Start difference. First operand 209 states and 214 transitions. Second operand has 258 states, 258 states have (on average 1.5116279069767442) internal successors, (390), 257 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:05:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:05:19,756 INFO L93 Difference]: Finished difference Result 419 states and 492 transitions. [2021-11-23 03:05:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-11-23 03:05:19,757 INFO L78 Accepts]: Start accepts. Automaton has has 258 states, 258 states have (on average 1.5116279069767442) internal successors, (390), 257 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-23 03:05:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:05:19,760 INFO L225 Difference]: With dead ends: 419 [2021-11-23 03:05:19,760 INFO L226 Difference]: Without dead ends: 401 [2021-11-23 03:05:19,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36255 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=41118, Invalid=112154, Unknown=0, NotChecked=0, Total=153272 [2021-11-23 03:05:19,773 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1106 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:05:19,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 133 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:05:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-23 03:05:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-11-23 03:05:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 397 states have (on average 1.022670025188917) internal successors, (406), 400 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:05:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 406 transitions. [2021-11-23 03:05:19,814 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 406 transitions. Word has length 195 [2021-11-23 03:05:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:05:19,815 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 406 transitions. [2021-11-23 03:05:19,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 258 states, 258 states have (on average 1.5116279069767442) internal successors, (390), 257 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:05:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 406 transitions. [2021-11-23 03:05:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-23 03:05:19,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:19,824 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 1, 1, 1, 1, 1, 1] [2021-11-23 03:05:19,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:05:20,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:05:20,025 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:05:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1219129024, now seen corresponding path program 7 times [2021-11-23 03:05:20,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:05:20,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350681537] [2021-11-23 03:05:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:20,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:05:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24130 backedges. 0 proven. 24130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:05:37,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:05:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350681537] [2021-11-23 03:05:37,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350681537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:05:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654918044] [2021-11-23 03:05:37,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:05:37,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:05:37,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:05:37,783 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:05:37,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:05:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:37,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 256 conjunts are in the unsatisfiable core [2021-11-23 03:05:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:05:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24130 backedges. 0 proven. 24130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:05:39,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:06:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24130 backedges. 0 proven. 24130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:06:22,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654918044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:06:22,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396784127] [2021-11-23 03:06:22,809 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:06:22,810 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:06:22,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:06:22,810 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:06:22,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:06:22,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:06:22,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:06:22,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:06:22,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:22,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 35 [2021-11-23 03:06:22,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:22,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:22,953 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-23 03:06:22,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 150 [2021-11-23 03:06:22,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 03:06:23,026 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:06:24,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8869#(and (<= 1048 |ULTIMATE.start_main_~i~0#1|) (< 2147483648 |ULTIMATE.start_main_#t~post7#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem6#1| |ULTIMATE.start_main_#t~post7#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:06:24,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:06:24,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:06:24,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [256, 256, 256] total 513 [2021-11-23 03:06:24,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842164946] [2021-11-23 03:06:24,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:06:24,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 514 states [2021-11-23 03:06:24,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:06:24,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 514 interpolants. [2021-11-23 03:06:24,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66333, Invalid=205629, Unknown=0, NotChecked=0, Total=271962 [2021-11-23 03:06:24,513 INFO L87 Difference]: Start difference. First operand 401 states and 406 transitions. Second operand has 514 states, 514 states have (on average 1.5058365758754864) internal successors, (774), 513 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:20,803 INFO L93 Difference]: Finished difference Result 803 states and 940 transitions. [2021-11-23 03:07:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-11-23 03:07:20,804 INFO L78 Accepts]: Start accepts. Automaton has has 514 states, 514 states have (on average 1.5058365758754864) internal successors, (774), 513 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 387 [2021-11-23 03:07:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:20,808 INFO L225 Difference]: With dead ends: 803 [2021-11-23 03:07:20,808 INFO L226 Difference]: Without dead ends: 785 [2021-11-23 03:07:20,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1669 GetRequests, 895 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138079 ImplicationChecksByTransitivity, 90.5s TimeCoverageRelationStatistics Valid=164126, Invalid=437274, Unknown=0, NotChecked=0, Total=601400 [2021-11-23 03:07:20,838 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2910 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2910 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:20,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2910 Valid, 100 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:07:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-11-23 03:07:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2021-11-23 03:07:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 781 states have (on average 1.0115236875800255) internal successors, (790), 784 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 790 transitions. [2021-11-23 03:07:20,887 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 790 transitions. Word has length 387 [2021-11-23 03:07:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:20,888 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 790 transitions. [2021-11-23 03:07:20,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 514 states, 514 states have (on average 1.5058365758754864) internal successors, (774), 513 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:07:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 790 transitions. [2021-11-23 03:07:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2021-11-23 03:07:20,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:20,918 INFO L514 BasicCegarLoop]: trace histogram [255, 255, 255, 1, 1, 1, 1, 1, 1] [2021-11-23 03:07:20,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 03:07:21,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:07:21,134 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-23 03:07:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:21,134 INFO L85 PathProgramCache]: Analyzing trace with hash 453349056, now seen corresponding path program 8 times [2021-11-23 03:07:21,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:21,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860103284] [2021-11-23 03:07:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:21,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 97410 backedges. 0 proven. 97410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:08:27,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:27,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860103284] [2021-11-23 03:08:27,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860103284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:08:27,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382227904] [2021-11-23 03:08:27,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:08:27,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:27,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:27,360 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:27,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5076e01f-fefa-4164-ab8c-b05121b0e4c0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process