./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d69e4513fb8989bf305d8f9ce21862e8623f2a3d0c8146e8e7fb7e8c658a7eff --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:24:01,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:24:01,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:24:01,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:24:01,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:24:01,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:24:01,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:24:01,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:24:01,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:24:01,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:24:01,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:24:01,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:24:01,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:24:01,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:24:01,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:24:01,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:24:01,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:24:01,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:24:01,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:24:01,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:24:01,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:24:01,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:24:01,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:24:01,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:24:01,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:24:01,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:24:01,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:24:01,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:24:01,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:24:01,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:24:01,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:24:01,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:24:01,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:24:01,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:24:01,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:24:01,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:24:01,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:24:01,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:24:01,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:24:01,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:24:01,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:24:01,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-25 18:24:01,407 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:24:01,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:24:01,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:24:01,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:24:01,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:24:01,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:24:01,414 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:24:01,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:24:01,415 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:24:01,415 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:24:01,416 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:24:01,416 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:24:01,416 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:24:01,417 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:24:01,417 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:24:01,417 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:24:01,417 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:24:01,418 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:24:01,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:24:01,419 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:24:01,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:24:01,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:24:01,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:24:01,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:24:01,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:24:01,420 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 18:24:01,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:24:01,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:24:01,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:24:01,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:24:01,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:24:01,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:24:01,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:24:01,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:24:01,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:24:01,422 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:24:01,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:24:01,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:24:01,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:24:01,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:24:01,423 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_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d69e4513fb8989bf305d8f9ce21862e8623f2a3d0c8146e8e7fb7e8c658a7eff [2021-11-25 18:24:01,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:24:01,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:24:01,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:24:01,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:24:01,751 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:24:01,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2021-11-25 18:24:01,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/data/06a328e3e/40461f5e66c2425b867f266cb42ada50/FLAGf2f22c8fa [2021-11-25 18:24:02,259 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:24:02,260 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2021-11-25 18:24:02,273 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/data/06a328e3e/40461f5e66c2425b867f266cb42ada50/FLAGf2f22c8fa [2021-11-25 18:24:02,662 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/data/06a328e3e/40461f5e66c2425b867f266cb42ada50 [2021-11-25 18:24:02,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:24:02,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:24:02,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:24:02,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:24:02,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:24:02,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37053746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02, skipping insertion in model container [2021-11-25 18:24:02,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:24:02,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:24:02,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:24:02,892 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:24:02,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:24:02,925 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:24:02,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02 WrapperNode [2021-11-25 18:24:02,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:24:02,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:24:02,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:24:02,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:24:02,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,959 INFO L137 Inliner]: procedures = 8, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2021-11-25 18:24:02,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:24:02,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:24:02,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:24:02,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:24:02,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:24:02,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:24:02,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:24:02,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:24:02,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (1/1) ... [2021-11-25 18:24:02,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:24:03,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:03,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:24:03,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:24:03,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:24:03,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:24:03,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:24:03,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:24:03,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:24:03,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:24:03,129 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:24:03,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:24:03,262 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:24:03,292 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:24:03,292 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:24:03,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:24:03 BoogieIcfgContainer [2021-11-25 18:24:03,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:24:03,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:24:03,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:24:03,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:24:03,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:24:02" (1/3) ... [2021-11-25 18:24:03,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c50385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:24:03, skipping insertion in model container [2021-11-25 18:24:03,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:24:02" (2/3) ... [2021-11-25 18:24:03,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c50385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:24:03, skipping insertion in model container [2021-11-25 18:24:03,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:24:03" (3/3) ... [2021-11-25 18:24:03,303 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Array-1.c [2021-11-25 18:24:03,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:24:03,309 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-25 18:24:03,355 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:24:03,362 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:24:03,362 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-25 18:24:03,376 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) [2021-11-25 18:24:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 18:24:03,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:03,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 18:24:03,382 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)] === [2021-11-25 18:24:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash 86379, now seen corresponding path program 1 times [2021-11-25 18:24:03,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:03,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408577538] [2021-11-25 18:24:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:03,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:03,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:03,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408577538] [2021-11-25 18:24:03,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408577538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:03,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:24:03,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:24:03,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375201445] [2021-11-25 18:24:03,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:03,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:24:03,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:24:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:24:03,602 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) [2021-11-25 18:24:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:03,656 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-11-25 18:24:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:24:03,659 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 [2021-11-25 18:24:03,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:03,666 INFO L225 Difference]: With dead ends: 37 [2021-11-25 18:24:03,666 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 18:24:03,669 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 [2021-11-25 18:24:03,673 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 [2021-11-25 18:24:03,674 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] [2021-11-25 18:24:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 18:24:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-25 18:24:03,703 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) [2021-11-25 18:24:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-25 18:24:03,705 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 3 [2021-11-25 18:24:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:03,706 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-25 18:24:03,706 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) [2021-11-25 18:24:03,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-25 18:24:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:24:03,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:03,707 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-11-25 18:24:03,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:24:03,708 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)] === [2021-11-25 18:24:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:03,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1721603529, now seen corresponding path program 1 times [2021-11-25 18:24:03,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:03,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257358313] [2021-11-25 18:24:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:03,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:24:03,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:03,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257358313] [2021-11-25 18:24:03,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257358313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:03,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:24:03,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:24:03,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215333719] [2021-11-25 18:24:03,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:03,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:24:03,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:03,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:24:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:24:03,775 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) [2021-11-25 18:24:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:03,807 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-25 18:24:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:24:03,808 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 [2021-11-25 18:24:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:03,809 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:24:03,809 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 18:24:03,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:24:03,812 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 [2021-11-25 18:24:03,813 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] [2021-11-25 18:24:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 18:24:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 18:24:03,822 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) [2021-11-25 18:24:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-25 18:24:03,823 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2021-11-25 18:24:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:03,824 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-25 18:24:03,824 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) [2021-11-25 18:24:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-25 18:24:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:24:03,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:03,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2021-11-25 18:24:03,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:24:03,826 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)] === [2021-11-25 18:24:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1830101801, now seen corresponding path program 1 times [2021-11-25 18:24:03,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:03,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182830383] [2021-11-25 18:24:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:03,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:03,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:03,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182830383] [2021-11-25 18:24:03,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182830383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:03,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189150044] [2021-11-25 18:24:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:03,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:03,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:03,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:03,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:24:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:04,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:24:04,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:04,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:24:04,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189150044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:04,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:24:04,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 18:24:04,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274102758] [2021-11-25 18:24:04,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:04,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:24:04,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:04,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:24:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:24:04,096 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) [2021-11-25 18:24:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:04,144 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-25 18:24:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:24:04,145 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 [2021-11-25 18:24:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:04,146 INFO L225 Difference]: With dead ends: 19 [2021-11-25 18:24:04,147 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 18:24:04,148 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 [2021-11-25 18:24:04,150 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 [2021-11-25 18:24:04,154 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] [2021-11-25 18:24:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 18:24:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-11-25 18:24:04,157 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) [2021-11-25 18:24:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-25 18:24:04,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 7 [2021-11-25 18:24:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:04,158 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-25 18:24:04,158 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) [2021-11-25 18:24:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-25 18:24:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:24:04,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:04,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:24:04,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:04,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:04,383 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)] === [2021-11-25 18:24:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2081092992, now seen corresponding path program 1 times [2021-11-25 18:24:04,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:04,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996406151] [2021-11-25 18:24:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:04,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:04,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996406151] [2021-11-25 18:24:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996406151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433588177] [2021-11-25 18:24:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:04,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:04,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:04,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:04,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:24:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:04,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:24:04,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:04,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:04,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433588177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:24:04,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1378035782] [2021-11-25 18:24:04,603 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:24:04,603 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:04,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:24:04,612 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:24:04,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:24:04,687 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 [2021-11-25 18:24:04,699 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 [2021-11-25 18:24:04,753 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 15 treesize of output 11 [2021-11-25 18:24:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:04,840 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 32 treesize of output 27 [2021-11-25 18:24:05,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:05,098 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-25 18:24:05,099 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 151 treesize of output 141 [2021-11-25 18:24:05,274 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 15 treesize of output 11 [2021-11-25 18:24:05,364 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:24:05,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1378035782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:24:05,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:24:05,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 16 [2021-11-25 18:24:05,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481216605] [2021-11-25 18:24:05,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:24:05,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:24:05,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:24:05,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:24:05,696 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) [2021-11-25 18:24:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:05,860 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-11-25 18:24:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:24:05,860 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 [2021-11-25 18:24:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:05,861 INFO L225 Difference]: With dead ends: 27 [2021-11-25 18:24:05,861 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 18:24:05,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:24:05,863 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 [2021-11-25 18:24:05,864 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] [2021-11-25 18:24:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 18:24:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-11-25 18:24:05,868 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) [2021-11-25 18:24:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-25 18:24:05,869 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2021-11-25 18:24:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:05,869 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-25 18:24:05,869 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) [2021-11-25 18:24:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-25 18:24:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:24:05,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:05,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:24:05,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:06,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:06,091 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)] === [2021-11-25 18:24:06,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:06,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2081092800, now seen corresponding path program 1 times [2021-11-25 18:24:06,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:06,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216437481] [2021-11-25 18:24:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:06,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:06,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:06,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216437481] [2021-11-25 18:24:06,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216437481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:06,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830952077] [2021-11-25 18:24:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:06,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:06,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:06,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:06,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:24:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:24:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:06,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:06,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830952077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:24:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821272023] [2021-11-25 18:24:06,296 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:24:06,296 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:06,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:24:06,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:24:06,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:24:06,316 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 [2021-11-25 18:24:06,323 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 [2021-11-25 18:24:06,339 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 15 treesize of output 11 [2021-11-25 18:24:06,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:06,384 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 42 treesize of output 32 [2021-11-25 18:24:06,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:06,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:06,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:06,507 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-25 18:24:06,507 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 169 treesize of output 152 [2021-11-25 18:24:06,594 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 15 treesize of output 11 [2021-11-25 18:24:06,702 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:24:07,139 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 [2021-11-25 18:24:07,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:24:07,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:24:07,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-25 18:24:07,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930248964] [2021-11-25 18:24:07,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:24:07,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:24:07,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:24:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:24:07,141 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) [2021-11-25 18:24:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:07,194 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-11-25 18:24:07,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:24:07,197 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 [2021-11-25 18:24:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:07,197 INFO L225 Difference]: With dead ends: 47 [2021-11-25 18:24:07,197 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:24:07,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:24:07,199 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 [2021-11-25 18:24:07,199 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] [2021-11-25 18:24:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:24:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 18:24:07,204 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) [2021-11-25 18:24:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-25 18:24:07,207 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 9 [2021-11-25 18:24:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:07,208 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-25 18:24:07,208 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) [2021-11-25 18:24:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-25 18:24:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:24:07,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:07,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 18:24:07,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:07,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:07,430 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)] === [2021-11-25 18:24:07,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:07,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2122016704, now seen corresponding path program 2 times [2021-11-25 18:24:07,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:07,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775331252] [2021-11-25 18:24:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:07,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:07,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775331252] [2021-11-25 18:24:07,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775331252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161184935] [2021-11-25 18:24:07,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:24:07,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:07,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:07,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:07,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:24:07,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:24:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:24:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:24:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:07,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:07,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161184935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:24:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1674531639] [2021-11-25 18:24:07,736 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:24:07,736 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:07,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:24:07,737 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:24:07,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:24:07,754 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 [2021-11-25 18:24:07,761 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 [2021-11-25 18:24:07,778 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 15 treesize of output 11 [2021-11-25 18:24:07,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:07,808 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 32 treesize of output 27 [2021-11-25 18:24:07,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:07,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:07,937 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-25 18:24:07,938 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 171 treesize of output 142 [2021-11-25 18:24:07,978 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 15 treesize of output 11 [2021-11-25 18:24:08,028 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:24:08,394 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 [2021-11-25 18:24:08,394 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:24:08,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:24:08,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-11-25 18:24:08,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052892772] [2021-11-25 18:24:08,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:24:08,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:24:08,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:08,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:24:08,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-11-25 18:24:08,397 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) [2021-11-25 18:24:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:08,509 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2021-11-25 18:24:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:24:08,510 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 [2021-11-25 18:24:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:08,511 INFO L225 Difference]: With dead ends: 59 [2021-11-25 18:24:08,511 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 18:24:08,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:24:08,512 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:08,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 56 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:24:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 18:24:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-25 18:24:08,519 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) [2021-11-25 18:24:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-25 18:24:08,520 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 15 [2021-11-25 18:24:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:08,520 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-25 18:24:08,520 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) [2021-11-25 18:24:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-25 18:24:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:24:08,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:08,521 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-25 18:24:08,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:08,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:24:08,736 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)] === [2021-11-25 18:24:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash -431357760, now seen corresponding path program 3 times [2021-11-25 18:24:08,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:08,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111148617] [2021-11-25 18:24:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:08,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:08,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:08,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111148617] [2021-11-25 18:24:08,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111148617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:08,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223315965] [2021-11-25 18:24:08,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:24:08,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:08,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:08,974 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:08,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:24:09,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:24:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:24:09,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 18:24:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:09,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:09,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223315965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:24:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [119722742] [2021-11-25 18:24:09,424 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:24:09,424 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:09,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:24:09,425 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:24:09,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:24:09,437 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 [2021-11-25 18:24:09,443 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 [2021-11-25 18:24:09,462 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 15 treesize of output 11 [2021-11-25 18:24:09,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:09,489 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 42 treesize of output 32 [2021-11-25 18:24:09,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:09,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:09,597 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-25 18:24:09,597 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 151 treesize of output 141 [2021-11-25 18:24:09,667 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 15 treesize of output 11 [2021-11-25 18:24:09,712 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:24:10,168 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 [2021-11-25 18:24:10,168 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:24:10,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:24:10,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-11-25 18:24:10,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429589303] [2021-11-25 18:24:10,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:24:10,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 18:24:10,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 18:24:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 18:24:10,171 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) [2021-11-25 18:24:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:10,518 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-11-25 18:24:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 18:24:10,520 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 [2021-11-25 18:24:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:10,521 INFO L225 Difference]: With dead ends: 83 [2021-11-25 18:24:10,521 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 18:24:10,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=686, Invalid=2394, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 18:24:10,524 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 [2021-11-25 18:24:10,524 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] [2021-11-25 18:24:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 18:24:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-25 18:24:10,532 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) [2021-11-25 18:24:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-11-25 18:24:10,533 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 27 [2021-11-25 18:24:10,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:10,533 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-11-25 18:24:10,534 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) [2021-11-25 18:24:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-11-25 18:24:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:24:10,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:10,536 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-25 18:24:10,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:10,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:10,759 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)] === [2021-11-25 18:24:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:10,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1815170368, now seen corresponding path program 4 times [2021-11-25 18:24:10,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:10,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654648004] [2021-11-25 18:24:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:10,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:11,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:11,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654648004] [2021-11-25 18:24:11,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654648004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36217114] [2021-11-25 18:24:11,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:24:11,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:11,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:11,267 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:11,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:24:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 18:24:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:11,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:12,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36217114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:24:12,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760883253] [2021-11-25 18:24:12,535 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:24:12,535 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:12,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:24:12,535 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:24:12,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:24:12,547 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 [2021-11-25 18:24:12,553 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 [2021-11-25 18:24:12,566 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 15 treesize of output 11 [2021-11-25 18:24:12,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:12,589 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 32 treesize of output 27 [2021-11-25 18:24:12,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:12,682 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-25 18:24:12,682 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 151 treesize of output 141 [2021-11-25 18:24:12,745 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 15 treesize of output 11 [2021-11-25 18:24:12,803 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:24:13,304 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 [2021-11-25 18:24:13,305 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:24:13,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:24:13,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 65 [2021-11-25 18:24:13,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204105086] [2021-11-25 18:24:13,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:24:13,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-25 18:24:13,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:13,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-25 18:24:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1149, Invalid=4253, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 18:24:13,309 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) [2021-11-25 18:24:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:14,157 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2021-11-25 18:24:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-25 18:24:14,159 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 [2021-11-25 18:24:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:14,165 INFO L225 Difference]: With dead ends: 131 [2021-11-25 18:24:14,165 INFO L226 Difference]: Without dead ends: 113 [2021-11-25 18:24:14,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2895 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2622, Invalid=8090, Unknown=0, NotChecked=0, Total=10712 [2021-11-25 18:24:14,172 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-11-25 18:24:14,173 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] [2021-11-25 18:24:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-25 18:24:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-25 18:24:14,197 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) [2021-11-25 18:24:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2021-11-25 18:24:14,202 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 51 [2021-11-25 18:24:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:14,203 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2021-11-25 18:24:14,203 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) [2021-11-25 18:24:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2021-11-25 18:24:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 18:24:14,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:14,209 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1] [2021-11-25 18:24:14,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:14,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:14,435 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)] === [2021-11-25 18:24:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1299584704, now seen corresponding path program 5 times [2021-11-25 18:24:14,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:14,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268003270] [2021-11-25 18:24:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:14,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:15,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268003270] [2021-11-25 18:24:15,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268003270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248210375] [2021-11-25 18:24:15,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:24:15,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:15,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:15,914 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:15,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:24:27,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-25 18:24:27,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:24:27,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-25 18:24:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:27,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248210375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:24:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44224723] [2021-11-25 18:24:31,047 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:24:31,047 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:31,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:24:31,048 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:24:31,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:24:31,074 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 [2021-11-25 18:24:31,078 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 [2021-11-25 18:24:31,089 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 15 treesize of output 11 [2021-11-25 18:24:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:31,110 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 32 treesize of output 27 [2021-11-25 18:24:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:31,232 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-25 18:24:31,233 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 151 treesize of output 141 [2021-11-25 18:24:31,292 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 15 treesize of output 11 [2021-11-25 18:24:31,334 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:24:31,931 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 [2021-11-25 18:24:31,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:24:31,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:24:31,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 129 [2021-11-25 18:24:31,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723391996] [2021-11-25 18:24:31,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:24:31,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-25 18:24:31,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-25 18:24:31,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4317, Invalid=14589, Unknown=0, NotChecked=0, Total=18906 [2021-11-25 18:24:31,941 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) [2021-11-25 18:24:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:34,420 INFO L93 Difference]: Finished difference Result 227 states and 268 transitions. [2021-11-25 18:24:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-25 18:24:34,421 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 [2021-11-25 18:24:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:34,425 INFO L225 Difference]: With dead ends: 227 [2021-11-25 18:24:34,425 INFO L226 Difference]: Without dead ends: 209 [2021-11-25 18:24:34,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9919 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=10334, Invalid=29466, Unknown=0, NotChecked=0, Total=39800 [2021-11-25 18:24:34,433 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 464 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:34,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 133 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:24:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-25 18:24:34,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-25 18:24:34,451 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) [2021-11-25 18:24:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 214 transitions. [2021-11-25 18:24:34,453 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 214 transitions. Word has length 99 [2021-11-25 18:24:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:34,453 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 214 transitions. [2021-11-25 18:24:34,454 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) [2021-11-25 18:24:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 214 transitions. [2021-11-25 18:24:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-25 18:24:34,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:34,457 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1] [2021-11-25 18:24:34,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 18:24:34,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:34,671 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)] === [2021-11-25 18:24:34,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1933369024, now seen corresponding path program 6 times [2021-11-25 18:24:34,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:34,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846585315] [2021-11-25 18:24:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:34,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:39,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846585315] [2021-11-25 18:24:39,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846585315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511040581] [2021-11-25 18:24:39,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:24:39,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:39,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:39,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:39,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:24:39,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:24:39,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:24:39,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-25 18:24:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:40,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:50,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511040581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:24:50,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196500001] [2021-11-25 18:24:50,825 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:24:50,826 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:50,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:24:50,826 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:24:50,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:24:50,836 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 [2021-11-25 18:24:50,850 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 [2021-11-25 18:24:50,871 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 15 treesize of output 11 [2021-11-25 18:24:50,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:50,900 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 42 treesize of output 32 [2021-11-25 18:24:50,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:50,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:50,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:50,995 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 181 treesize of output 147 [2021-11-25 18:24:51,038 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 15 treesize of output 11 [2021-11-25 18:24:51,077 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:24:51,869 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 [2021-11-25 18:24:51,869 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:24:51,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:24:51,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 257 [2021-11-25 18:24:51,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873213329] [2021-11-25 18:24:51,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:24:51,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 258 states [2021-11-25 18:24:51,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:51,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 258 interpolants. [2021-11-25 18:24:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16797, Invalid=53693, Unknown=0, NotChecked=0, Total=70490 [2021-11-25 18:24:51,881 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) [2021-11-25 18:25:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:25:01,716 INFO L93 Difference]: Finished difference Result 419 states and 492 transitions. [2021-11-25 18:25:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-11-25 18:25:01,717 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 [2021-11-25 18:25:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:25:01,720 INFO L225 Difference]: With dead ends: 419 [2021-11-25 18:25:01,720 INFO L226 Difference]: Without dead ends: 401 [2021-11-25 18:25:01,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36255 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=41118, Invalid=112154, Unknown=0, NotChecked=0, Total=153272 [2021-11-25 18:25:01,733 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1106 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:25:01,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 133 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:25:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-25 18:25:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-11-25 18:25:01,764 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) [2021-11-25 18:25:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 406 transitions. [2021-11-25 18:25:01,766 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 406 transitions. Word has length 195 [2021-11-25 18:25:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:25:01,767 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 406 transitions. [2021-11-25 18:25:01,767 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) [2021-11-25 18:25:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 406 transitions. [2021-11-25 18:25:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-25 18:25:01,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:25:01,774 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 1, 1, 1, 1, 1, 1] [2021-11-25 18:25:01,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:25:01,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:01,987 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)] === [2021-11-25 18:25:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:25:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1219129024, now seen corresponding path program 7 times [2021-11-25 18:25:01,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:25:01,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277731567] [2021-11-25 18:25:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:01,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:25:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24130 backedges. 0 proven. 24130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:25:18,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:25:18,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277731567] [2021-11-25 18:25:18,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277731567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:18,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486102214] [2021-11-25 18:25:18,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:25:18,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:18,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:25:18,594 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:25:18,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:25:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 256 conjunts are in the unsatisfiable core [2021-11-25 18:25:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:25:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24130 backedges. 0 proven. 24130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:25:19,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 24130 backedges. 0 proven. 24130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:26:01,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486102214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:26:01,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1123293527] [2021-11-25 18:26:01,451 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:26:01,451 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:01,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:26:01,451 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:26:01,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:01,459 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 [2021-11-25 18:26:01,466 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 [2021-11-25 18:26:01,476 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 15 treesize of output 11 [2021-11-25 18:26:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:01,505 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 32 treesize of output 27 [2021-11-25 18:26:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:26:01,570 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-25 18:26:01,570 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 171 treesize of output 142 [2021-11-25 18:26:01,630 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 15 treesize of output 11 [2021-11-25 18:26:01,678 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:26:03,108 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 [2021-11-25 18:26:03,108 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:03,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:03,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [256, 256, 256] total 513 [2021-11-25 18:26:03,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391480499] [2021-11-25 18:26:03,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:03,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 514 states [2021-11-25 18:26:03,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 514 interpolants. [2021-11-25 18:26:03,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66333, Invalid=205629, Unknown=0, NotChecked=0, Total=271962 [2021-11-25 18:26:03,131 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) [2021-11-25 18:26:55,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:55,568 INFO L93 Difference]: Finished difference Result 803 states and 940 transitions. [2021-11-25 18:26:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-11-25 18:26:55,569 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 [2021-11-25 18:26:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:55,574 INFO L225 Difference]: With dead ends: 803 [2021-11-25 18:26:55,574 INFO L226 Difference]: Without dead ends: 785 [2021-11-25 18:26:55,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1669 GetRequests, 895 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138079 ImplicationChecksByTransitivity, 86.3s TimeCoverageRelationStatistics Valid=164126, Invalid=437274, Unknown=0, NotChecked=0, Total=601400 [2021-11-25 18:26:55,608 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2910 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:55,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2910 Valid, 100 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 18:26:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-11-25 18:26:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2021-11-25 18:26:55,643 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) [2021-11-25 18:26:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 790 transitions. [2021-11-25 18:26:55,646 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 790 transitions. Word has length 387 [2021-11-25 18:26:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:55,646 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 790 transitions. [2021-11-25 18:26:55,647 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) [2021-11-25 18:26:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 790 transitions. [2021-11-25 18:26:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2021-11-25 18:26:55,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:55,671 INFO L514 BasicCegarLoop]: trace histogram [255, 255, 255, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:55,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:55,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 18:26:55,887 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)] === [2021-11-25 18:26:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash 453349056, now seen corresponding path program 8 times [2021-11-25 18:26:55,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:55,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064885585] [2021-11-25 18:26:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:55,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 97410 backedges. 0 proven. 97410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:00,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:00,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064885585] [2021-11-25 18:28:00,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064885585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:00,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766467941] [2021-11-25 18:28:00,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:28:00,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:00,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:00,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:00,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9078f8bf-b765-4a21-b731-22af39ae2446/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process