./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19809800fbb837760f7dcf4b8a93f7732bb250505f3f751815caa258bac4c35a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:43:35,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:43:35,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:43:35,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:43:35,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:43:35,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:43:35,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:43:35,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:43:35,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:43:35,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:43:35,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:43:35,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:43:35,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:43:35,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:43:35,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:43:35,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:43:35,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:43:35,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:43:35,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:43:35,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:43:35,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:43:35,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:43:35,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:43:35,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:43:35,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:43:35,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:43:35,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:43:35,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:43:35,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:43:35,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:43:35,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:43:35,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:43:35,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:43:35,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:43:35,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:43:35,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:43:35,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:43:35,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:43:35,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:43:35,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:43:35,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:43:35,438 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:43:35,461 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:43:35,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:43:35,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:43:35,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:43:35,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:43:35,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:43:35,463 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:43:35,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:43:35,463 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:43:35,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:43:35,464 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:43:35,464 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:43:35,464 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:43:35,465 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:43:35,465 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:43:35,465 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:43:35,465 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:43:35,466 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:43:35,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:43:35,467 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:43:35,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:43:35,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:43:35,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:43:35,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:43:35,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:43:35,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:43:35,468 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:43:35,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:43:35,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:43:35,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:43:35,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:43:35,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:43:35,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:35,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:43:35,470 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:43:35,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:43:35,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:43:35,471 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:43:35,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:43:35,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:43:35,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:43:35,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19809800fbb837760f7dcf4b8a93f7732bb250505f3f751815caa258bac4c35a [2022-11-03 03:43:35,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:43:35,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:43:35,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:43:35,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:43:35,765 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:43:35,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2022-11-03 03:43:35,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/data/c7449b349/661156e7a1ea46c7a8d8632812faf647/FLAG6b2b679a1 [2022-11-03 03:43:36,338 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:43:36,338 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i [2022-11-03 03:43:36,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/data/c7449b349/661156e7a1ea46c7a8d8632812faf647/FLAG6b2b679a1 [2022-11-03 03:43:36,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/data/c7449b349/661156e7a1ea46c7a8d8632812faf647 [2022-11-03 03:43:36,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:43:36,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:43:36,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:36,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:43:36,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:43:36,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:36,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2b6186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36, skipping insertion in model container [2022-11-03 03:43:36,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:36,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:43:36,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:43:36,933 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i[860,873] [2022-11-03 03:43:36,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:36,955 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:43:36,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/sv-benchmarks/c/array-examples/standard_copyInitSum_ground.i[860,873] [2022-11-03 03:43:36,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:36,988 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:43:36,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36 WrapperNode [2022-11-03 03:43:36,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:36,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:36,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:43:36,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:43:36,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,021 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-03 03:43:37,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:37,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:43:37,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:43:37,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:43:37,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,044 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:43:37,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:43:37,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:43:37,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:43:37,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (1/1) ... [2022-11-03 03:43:37,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:37,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:37,103 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:43:37,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:43:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:43:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:43:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:43:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:43:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:43:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:43:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:43:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:43:37,210 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:43:37,212 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:43:37,352 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:43:37,387 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:43:37,388 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 03:43:37,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:37 BoogieIcfgContainer [2022-11-03 03:43:37,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:43:37,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:43:37,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:43:37,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:43:37,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:43:36" (1/3) ... [2022-11-03 03:43:37,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556f7691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:37, skipping insertion in model container [2022-11-03 03:43:37,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:36" (2/3) ... [2022-11-03 03:43:37,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556f7691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:37, skipping insertion in model container [2022-11-03 03:43:37,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:37" (3/3) ... [2022-11-03 03:43:37,400 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2022-11-03 03:43:37,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:43:37,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:43:37,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:37,475 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@da182ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:37,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:43:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 03:43:37,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:37,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:37,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1009842514, now seen corresponding path program 1 times [2022-11-03 03:43:37,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:37,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698055418] [2022-11-03 03:43:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:37,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698055418] [2022-11-03 03:43:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698055418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:37,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:43:37,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115580408] [2022-11-03 03:43:37,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:37,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:37,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:37,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:37,836 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:37,938 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-11-03 03:43:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:37,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 03:43:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:37,949 INFO L225 Difference]: With dead ends: 21 [2022-11-03 03:43:37,949 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 03:43:37,952 INFO L412 NwaCegarLoop]: 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 [2022-11-03 03:43:37,960 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:37,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 03:43:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 03:43:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-03 03:43:38,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2022-11-03 03:43:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:38,041 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-03 03:43:38,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-03 03:43:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:43:38,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:38,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:38,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:43:38,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1941548889, now seen corresponding path program 1 times [2022-11-03 03:43:38,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:38,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290155312] [2022-11-03 03:43:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:38,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:43:38,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290155312] [2022-11-03 03:43:38,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290155312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:38,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623376323] [2022-11-03 03:43:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:38,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:38,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:38,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:38,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:43:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:38,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:43:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:43:38,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:43:38,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623376323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:38,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1754385637] [2022-11-03 03:43:38,352 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:43:38,353 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:43:38,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:43:38,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:43:38,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:43:38,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:38,559 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 03:43:38,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 03:43:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:38,630 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 03:43:38,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 03:43:38,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:38,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:43:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:38,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:38,871 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:43:38,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 236 [2022-11-03 03:43:39,043 INFO L390 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 16 treesize of output 12 [2022-11-03 03:43:39,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:39,084 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:43:39,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 03:43:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:39,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:39,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:39,176 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:43:39,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-03 03:43:39,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:39,241 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:43:39,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 03:43:39,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:39,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:39,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:39,372 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:43:39,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~incr~0#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_~incr~0#1| 42)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~incr~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-03 03:43:39,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:43:39,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:43:39,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 03:43:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383545754] [2022-11-03 03:43:39,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:43:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:43:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:43:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:43:39,618 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:39,682 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2022-11-03 03:43:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:43:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:43:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:39,684 INFO L225 Difference]: With dead ends: 30 [2022-11-03 03:43:39,697 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 03:43:39,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:43:39,699 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:39,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 03:43:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-03 03:43:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-11-03 03:43:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-03 03:43:39,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2022-11-03 03:43:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:39,704 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-03 03:43:39,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-03 03:43:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 03:43:39,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:39,706 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:39,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:39,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:39,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:39,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:39,907 INFO L85 PathProgramCache]: Analyzing trace with hash -390525806, now seen corresponding path program 2 times [2022-11-03 03:43:39,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:39,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624131656] [2022-11-03 03:43:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:39,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:43:40,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:40,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624131656] [2022-11-03 03:43:40,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624131656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:40,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319788156] [2022-11-03 03:43:40,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:43:40,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:40,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:40,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:40,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:43:40,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:43:40,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:43:40,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:43:40,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:43:40,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:43:40,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319788156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:40,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707024521] [2022-11-03 03:43:40,372 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:43:40,372 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:43:40,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:43:40,373 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:43:40,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:43:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:40,457 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 03:43:40,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 03:43:40,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:40,527 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 03:43:40,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 03:43:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:40,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:43:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:40,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:40,673 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:43:40,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 236 [2022-11-03 03:43:40,789 INFO L390 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 16 treesize of output 12 [2022-11-03 03:43:40,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:40,824 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:43:40,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 03:43:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:40,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:40,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:40,882 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:43:40,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-03 03:43:40,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:40,921 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:43:40,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 03:43:40,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:40,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:40,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:41,022 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:43:41,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~incr~0#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_~incr~0#1| 42)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~incr~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-03 03:43:41,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:43:41,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:43:41,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-03 03:43:41,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424993523] [2022-11-03 03:43:41,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:43:41,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:43:41,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:43:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:43:41,282 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2022-11-03 03:43:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:41,409 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-11-03 03:43:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:43:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) Word has length 19 [2022-11-03 03:43:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:41,411 INFO L225 Difference]: With dead ends: 54 [2022-11-03 03:43:41,411 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 03:43:41,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:43:41,418 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:41,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 03:43:41,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-03 03:43:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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) [2022-11-03 03:43:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-03 03:43:41,435 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 19 [2022-11-03 03:43:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:41,435 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-03 03:43:41,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) [2022-11-03 03:43:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-03 03:43:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 03:43:41,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:41,437 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:41,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:41,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:41,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1129121138, now seen corresponding path program 3 times [2022-11-03 03:43:41,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:41,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737342257] [2022-11-03 03:43:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-03 03:43:42,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737342257] [2022-11-03 03:43:42,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737342257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971902570] [2022-11-03 03:43:42,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:43:42,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:42,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:42,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:43:42,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:43:42,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:43:42,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:43:42,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-03 03:43:42,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-03 03:43:42,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971902570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:42,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [412042080] [2022-11-03 03:43:42,454 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:43:42,454 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:43:42,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:43:42,455 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:43:42,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:43:42,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:42,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:42,520 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 03:43:42,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 03:43:42,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:42,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 03:43:42,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:42,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:43:42,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:42,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:42,666 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:43:42,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 236 [2022-11-03 03:43:42,762 INFO L390 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 16 treesize of output 12 [2022-11-03 03:43:42,786 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:43:42,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:43:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:42,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:42,894 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:43:42,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 99 [2022-11-03 03:43:42,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:42,983 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:43:42,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 03:43:42,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:43,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:43,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:43,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:43:43,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '757#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~incr~0#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_~incr~0#1| 42)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~incr~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-03 03:43:43,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:43:43,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:43:43,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-03 03:43:43,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329986015] [2022-11-03 03:43:43,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:43:43,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:43:43,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:43:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:43:43,507 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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) [2022-11-03 03:43:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:43,768 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2022-11-03 03:43:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:43:43,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 37 [2022-11-03 03:43:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:43,773 INFO L225 Difference]: With dead ends: 102 [2022-11-03 03:43:43,773 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 03:43:43,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:43:43,784 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:43,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:43:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 03:43:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-03 03:43:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-03 03:43:43,803 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 37 [2022-11-03 03:43:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:43,804 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-03 03:43:43,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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) [2022-11-03 03:43:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-03 03:43:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:43:43,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:43,809 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:43,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:44,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:44,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:44,043 INFO L85 PathProgramCache]: Analyzing trace with hash 946081586, now seen corresponding path program 4 times [2022-11-03 03:43:44,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:44,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040152076] [2022-11-03 03:43:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:44,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-03 03:43:45,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:45,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040152076] [2022-11-03 03:43:45,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040152076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:45,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698102161] [2022-11-03 03:43:45,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:43:45,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:45,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:45,003 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:45,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:43:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:45,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:43:45,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-03 03:43:45,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-03 03:43:46,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698102161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:46,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2072164297] [2022-11-03 03:43:46,164 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:43:46,164 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:43:46,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:43:46,165 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:43:46,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:43:46,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:46,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:46,218 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 03:43:46,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 03:43:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:46,279 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 03:43:46,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 03:43:46,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:46,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:43:46,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:46,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:46,406 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:43:46,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 236 [2022-11-03 03:43:46,479 INFO L390 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 16 treesize of output 12 [2022-11-03 03:43:46,500 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:43:46,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:43:46,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:46,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:46,600 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:43:46,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 89 [2022-11-03 03:43:46,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:46,663 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:43:46,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 03:43:46,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:43:46,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:46,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2022-11-03 03:43:46,745 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:43:47,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1582#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~incr~0#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_~incr~0#1| 42)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~incr~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-03 03:43:47,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:43:47,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:43:47,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-03 03:43:47,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491923474] [2022-11-03 03:43:47,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:43:47,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 03:43:47,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:47,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 03:43:47,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 03:43:47,674 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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) [2022-11-03 03:43:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:48,202 INFO L93 Difference]: Finished difference Result 198 states and 275 transitions. [2022-11-03 03:43:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 03:43:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-03 03:43:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:48,211 INFO L225 Difference]: With dead ends: 198 [2022-11-03 03:43:48,211 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 03:43:48,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 167 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 03:43:48,216 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:48,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:43:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 03:43:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-03 03:43:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 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) [2022-11-03 03:43:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-11-03 03:43:48,239 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 73 [2022-11-03 03:43:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:48,239 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-11-03 03:43:48,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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) [2022-11-03 03:43:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-11-03 03:43:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 03:43:48,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:48,245 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:48,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:48,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:48,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2034859342, now seen corresponding path program 5 times [2022-11-03 03:43:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:48,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942808990] [2022-11-03 03:43:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-03 03:43:51,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:51,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942808990] [2022-11-03 03:43:51,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942808990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:51,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257536576] [2022-11-03 03:43:51,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:43:51,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:51,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:51,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:51,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f1d7e-5204-4c58-a147-2026a5fd01b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process