./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS --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 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 --- 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-8393723 [2022-11-19 06:50:54,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:50:54,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:50:54,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:50:54,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:50:54,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:50:54,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:50:54,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:50:54,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:50:54,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:50:54,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:50:54,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:50:54,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:50:54,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:50:54,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:50:54,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:50:54,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:50:54,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:50:54,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:50:54,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:50:54,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:50:54,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:50:54,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:50:54,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:50:54,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:50:54,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:50:54,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:50:54,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:50:54,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:50:54,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:50:54,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:50:54,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:50:54,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:50:54,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:50:54,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:50:54,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:50:54,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:50:54,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:50:54,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:50:54,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:50:54,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:50:54,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:50:55,006 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:50:55,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:50:55,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:50:55,008 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:50:55,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:50:55,009 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:50:55,009 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:50:55,009 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:50:55,009 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:50:55,010 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:50:55,011 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:50:55,011 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:50:55,011 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:50:55,012 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:50:55,012 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:50:55,012 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:50:55,012 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:50:55,012 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:50:55,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:50:55,013 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:50:55,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:50:55,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:50:55,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:50:55,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:50:55,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:50:55,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:50:55,015 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:50:55,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:50:55,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:50:55,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:50:55,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:50:55,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:50:55,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:50:55,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:50:55,018 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:50:55,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:50:55,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:50:55,019 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:50:55,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:50:55,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:50:55,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:50:55,020 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_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 [2022-11-19 06:50:55,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:50:55,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:50:55,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:50:55,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:50:55,346 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:50:55,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2022-11-19 06:50:55,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/data/fa5e77661/a8c1d67c4b334bc39255963319693e32/FLAG1a694ecd2 [2022-11-19 06:50:55,862 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:50:55,863 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2022-11-19 06:50:55,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/data/fa5e77661/a8c1d67c4b334bc39255963319693e32/FLAG1a694ecd2 [2022-11-19 06:50:56,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/data/fa5e77661/a8c1d67c4b334bc39255963319693e32 [2022-11-19 06:50:56,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:50:56,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:50:56,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:50:56,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:50:56,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:50:56,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bea2f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56, skipping insertion in model container [2022-11-19 06:50:56,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:50:56,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:50:56,485 WARN L234 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_f688d5ec-76f9-4fa2-be2c-387b5593eea3/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2022-11-19 06:50:56,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:50:56,514 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:50:56,527 WARN L234 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_f688d5ec-76f9-4fa2-be2c-387b5593eea3/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2022-11-19 06:50:56,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:50:56,550 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:50:56,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56 WrapperNode [2022-11-19 06:50:56,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:50:56,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:50:56,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:50:56,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:50:56,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,593 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-11-19 06:50:56,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:50:56,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:50:56,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:50:56,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:50:56,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,636 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:50:56,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:50:56,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:50:56,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:50:56,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (1/1) ... [2022-11-19 06:50:56,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:50:56,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:56,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:50:56,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:50:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:50:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:50:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:50:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:50:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:50:56,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:50:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:50:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:50:56,833 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:50:56,835 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:50:57,019 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:50:57,068 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:50:57,074 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-19 06:50:57,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:50:57 BoogieIcfgContainer [2022-11-19 06:50:57,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:50:57,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:50:57,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:50:57,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:50:57,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:50:56" (1/3) ... [2022-11-19 06:50:57,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e01dfef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:50:57, skipping insertion in model container [2022-11-19 06:50:57,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:56" (2/3) ... [2022-11-19 06:50:57,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e01dfef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:50:57, skipping insertion in model container [2022-11-19 06:50:57,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:50:57" (3/3) ... [2022-11-19 06:50:57,098 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2022-11-19 06:50:57,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:50:57,145 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:50:57,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:50:57,214 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;@63ab61dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:50:57,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:50:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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) [2022-11-19 06:50:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:50:57,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:57,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:57,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:57,236 INFO L85 PathProgramCache]: Analyzing trace with hash 902400515, now seen corresponding path program 1 times [2022-11-19 06:50:57,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:57,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010652110] [2022-11-19 06:50:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:57,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:57,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010652110] [2022-11-19 06:50:57,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010652110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:57,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:57,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:50:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266968800] [2022-11-19 06:50:57,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:57,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:57,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:57,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:57,665 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-19 06:50:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:57,746 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-11-19 06:50:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:57,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-11-19 06:50:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:57,758 INFO L225 Difference]: With dead ends: 21 [2022-11-19 06:50:57,759 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 06:50:57,762 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 [2022-11-19 06:50:57,775 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:57,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:50:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 06:50:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-19 06:50:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2022-11-19 06:50:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2022-11-19 06:50:57,817 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2022-11-19 06:50:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:57,818 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2022-11-19 06:50:57,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-19 06:50:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2022-11-19 06:50:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:50:57,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:57,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:57,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:50:57,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1054981377, now seen corresponding path program 1 times [2022-11-19 06:50:57,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:57,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207051738] [2022-11-19 06:50:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:57,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:57,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207051738] [2022-11-19 06:50:57,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207051738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:57,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492187294] [2022-11-19 06:50:57,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:57,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:57,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:57,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:57,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:50:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:58,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:50:58,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:50:58,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:50:58,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492187294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:58,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:50:58,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 06:50:58,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051384087] [2022-11-19 06:50:58,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:58,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:58,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:58,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:58,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:50:58,126 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:58,158 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2022-11-19 06:50:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 06:50:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:58,160 INFO L225 Difference]: With dead ends: 21 [2022-11-19 06:50:58,160 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 06:50:58,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:50:58,162 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:58,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:50:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 06:50:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-19 06:50:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-19 06:50:58,168 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2022-11-19 06:50:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:58,168 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-19 06:50:58,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-19 06:50:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:50:58,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:58,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:58,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:50:58,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:58,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:58,381 INFO L85 PathProgramCache]: Analyzing trace with hash -978011935, now seen corresponding path program 1 times [2022-11-19 06:50:58,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:58,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467751178] [2022-11-19 06:50:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:58,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:50:58,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:58,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467751178] [2022-11-19 06:50:58,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467751178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:58,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080198076] [2022-11-19 06:50:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:58,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:58,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:58,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:58,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:50:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:50:58,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:50:58,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:50:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:50:58,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080198076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:50:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376468507] [2022-11-19 06:50:58,656 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:50:58,657 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:50:58,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:50:58,671 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:50:58,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:50:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:58,953 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-19 06:50:58,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-19 06:50:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:59,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:59,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:59,160 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:50:59,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:50:59,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:59,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-19 06:50:59,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:50:59,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:50:59,571 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:50:59,572 INFO L350 Elim1Store]: Elim1 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 378 treesize of output 377 [2022-11-19 06:50:59,984 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:00,020 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:00,022 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:00,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,158 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:51:00,158 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:51:00,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,293 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:00,293 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:00,327 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:00,328 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:00,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,449 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:00,450 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:00,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,578 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:00,579 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:00,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,611 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:00,612 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:00,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,675 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:51:00,676 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 97 [2022-11-19 06:51:00,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:00,741 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:00,741 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:00,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:01,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '223#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:51:01,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:01,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:01,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 06:51:01,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931397441] [2022-11-19 06:51:01,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:01,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:51:01,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:01,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:51:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:51:01,013 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2022-11-19 06:51:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:01,071 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-11-19 06:51:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:51:01,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 12 [2022-11-19 06:51:01,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:01,074 INFO L225 Difference]: With dead ends: 28 [2022-11-19 06:51:01,074 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 06:51:01,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:51:01,079 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:01,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:51:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 06:51:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 06:51:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2022-11-19 06:51:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-19 06:51:01,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-11-19 06:51:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:01,095 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-19 06:51:01,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2022-11-19 06:51:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-19 06:51:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:51:01,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:01,100 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:01,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:01,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:01,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:01,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2044807905, now seen corresponding path program 2 times [2022-11-19 06:51:01,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:01,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795013625] [2022-11-19 06:51:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:01,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:51:01,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:01,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795013625] [2022-11-19 06:51:01,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795013625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:01,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568825576] [2022-11-19 06:51:01,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:51:01,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:01,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:01,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:51:01,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:51:01,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:51:01,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:51:01,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:51:01,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:51:01,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568825576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:01,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638969751] [2022-11-19 06:51:01,519 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:51:01,519 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:01,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:01,520 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:01,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:51:01,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,703 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:51:01,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:51:01,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-19 06:51:01,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 06:51:01,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:01,978 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:51:01,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 376 [2022-11-19 06:51:02,097 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:02,131 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:02,131 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:02,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:02,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:02,226 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:02,227 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:02,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:02,312 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:02,313 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:02,341 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:02,341 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:02,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:02,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:02,448 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:02,449 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:02,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:02,529 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:02,529 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:02,560 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:02,561 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:02,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:02,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:02,644 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:51:02,645 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:51:02,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:02,710 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:02,711 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:02,727 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:02,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:51:02,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:02,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:02,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 06:51:02,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057403946] [2022-11-19 06:51:02,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:02,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:51:02,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:02,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:51:02,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:51:02,945 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-11-19 06:51:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:03,012 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2022-11-19 06:51:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:51:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 06:51:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:03,013 INFO L225 Difference]: With dead ends: 35 [2022-11-19 06:51:03,013 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 06:51:03,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:51:03,014 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:03,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:51:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 06:51:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 06:51:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-19 06:51:03,019 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-11-19 06:51:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:03,020 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-19 06:51:03,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-11-19 06:51:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-19 06:51:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 06:51:03,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:03,021 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:03,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:03,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:03,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1019913981, now seen corresponding path program 3 times [2022-11-19 06:51:03,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:03,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921548975] [2022-11-19 06:51:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:03,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:51:03,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:03,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921548975] [2022-11-19 06:51:03,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921548975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:03,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52425432] [2022-11-19 06:51:03,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:51:03,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:03,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:03,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:03,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:51:03,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:51:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:51:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:51:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:51:03,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:51:03,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52425432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:03,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359876659] [2022-11-19 06:51:03,594 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:51:03,594 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:03,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:03,595 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:03,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:51:03,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:03,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:03,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:03,711 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-19 06:51:03,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-19 06:51:03,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:03,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:03,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:03,857 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:51:03,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:51:03,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:03,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-19 06:51:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:04,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,082 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:51:04,083 INFO L350 Elim1Store]: Elim1 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 378 treesize of output 377 [2022-11-19 06:51:04,303 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:04,328 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:04,329 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:04,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,430 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:51:04,431 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:51:04,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,520 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:04,521 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:04,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,546 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:04,546 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:04,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,588 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:51:04,588 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-19 06:51:04,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,648 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:04,648 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:04,690 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:04,690 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:04,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,759 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:51:04,760 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:51:04,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:04,825 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:04,826 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:04,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:05,139 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '659#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:51:05,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:05,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:05,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 06:51:05,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260287053] [2022-11-19 06:51:05,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:05,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:51:05,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:51:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:51:05,141 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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) [2022-11-19 06:51:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:05,187 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-11-19 06:51:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:51:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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 24 [2022-11-19 06:51:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:05,188 INFO L225 Difference]: With dead ends: 52 [2022-11-19 06:51:05,188 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 06:51:05,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:51:05,189 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:05,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:51:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 06:51:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-19 06:51:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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) [2022-11-19 06:51:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-19 06:51:05,195 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2022-11-19 06:51:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:05,195 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-19 06:51:05,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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) [2022-11-19 06:51:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-19 06:51:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 06:51:05,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:05,197 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:05,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:05,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:05,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1685268547, now seen corresponding path program 4 times [2022-11-19 06:51:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:05,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73919912] [2022-11-19 06:51:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:05,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:51:05,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73919912] [2022-11-19 06:51:05,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73919912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:05,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539159195] [2022-11-19 06:51:05,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:51:05,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:05,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:05,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:05,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:51:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:51:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:51:05,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:51:06,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539159195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610284260] [2022-11-19 06:51:06,151 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:51:06,151 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:06,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:06,152 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:06,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:51:06,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,291 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:51:06,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:51:06,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-19 06:51:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-19 06:51:06,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:06,487 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:51:06,488 INFO L350 Elim1Store]: Elim1 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 378 treesize of output 377 [2022-11-19 06:51:06,678 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:06,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:06,703 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:06,704 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:06,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:06,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:06,746 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:51:06,746 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 97 [2022-11-19 06:51:06,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:06,786 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:06,788 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:06,811 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:06,814 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:06,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:06,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:06,886 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:51:06,887 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:51:06,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:06,937 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:06,937 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:06,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:06,968 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:06,969 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:07,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:07,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:07,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:07,025 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:51:07,026 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 97 [2022-11-19 06:51:07,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:07,068 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:07,069 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:07,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:07,328 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1017#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:51:07,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:07,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:07,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 06:51:07,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668054287] [2022-11-19 06:51:07,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:07,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 06:51:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 06:51:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-19 06:51:07,331 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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) [2022-11-19 06:51:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:07,409 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-11-19 06:51:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 06:51:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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 30 [2022-11-19 06:51:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:07,414 INFO L225 Difference]: With dead ends: 64 [2022-11-19 06:51:07,415 INFO L226 Difference]: Without dead ends: 44 [2022-11-19 06:51:07,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-19 06:51:07,416 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:07,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:51:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-19 06:51:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-19 06:51:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 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) [2022-11-19 06:51:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-19 06:51:07,422 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 30 [2022-11-19 06:51:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:07,422 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-19 06:51:07,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 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) [2022-11-19 06:51:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-19 06:51:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 06:51:07,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:07,423 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:07,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:07,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:51:07,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:07,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:07,624 INFO L85 PathProgramCache]: Analyzing trace with hash 136935107, now seen corresponding path program 5 times [2022-11-19 06:51:07,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:07,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751602365] [2022-11-19 06:51:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:07,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:51:08,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:08,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751602365] [2022-11-19 06:51:08,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751602365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:08,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029615322] [2022-11-19 06:51:08,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:51:08,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:08,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:08,379 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:08,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:51:08,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:51:08,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:51:08,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:51:08,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-19 06:51:08,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-19 06:51:08,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029615322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:08,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708659822] [2022-11-19 06:51:08,765 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:51:08,765 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:08,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:08,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:08,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:51:08,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:08,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:08,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:08,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:08,878 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-19 06:51:08,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-19 06:51:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:08,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:09,028 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:51:09,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:51:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:09,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-19 06:51:09,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:09,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,223 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:51:09,223 INFO L350 Elim1Store]: Elim1 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 378 treesize of output 377 [2022-11-19 06:51:09,402 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:09,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,425 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:09,426 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:09,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,476 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:51:09,476 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 97 [2022-11-19 06:51:09,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,528 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:09,529 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:09,555 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:09,556 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:09,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,624 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:51:09,624 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:51:09,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,693 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:09,694 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:09,734 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:09,734 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:09,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,812 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:09,812 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:09,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:09,889 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:09,890 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:09,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:10,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1505#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:51:10,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:10,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:10,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-19 06:51:10,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254977346] [2022-11-19 06:51:10,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:10,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 06:51:10,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:10,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 06:51:10,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 06:51:10,211 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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) [2022-11-19 06:51:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:10,395 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-11-19 06:51:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 06:51:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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 42 [2022-11-19 06:51:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:10,397 INFO L225 Difference]: With dead ends: 83 [2022-11-19 06:51:10,397 INFO L226 Difference]: Without dead ends: 63 [2022-11-19 06:51:10,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 06:51:10,398 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:10,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:51:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-19 06:51:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-19 06:51:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 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) [2022-11-19 06:51:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-11-19 06:51:10,406 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 42 [2022-11-19 06:51:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:10,407 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-11-19 06:51:10,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 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) [2022-11-19 06:51:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-11-19 06:51:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 06:51:10,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:10,414 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:10,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:10,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:51:10,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1304933889, now seen corresponding path program 6 times [2022-11-19 06:51:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:10,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379092042] [2022-11-19 06:51:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:10,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 06:51:11,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:11,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379092042] [2022-11-19 06:51:11,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379092042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:11,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174228992] [2022-11-19 06:51:11,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:51:11,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:11,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:11,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:11,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:51:11,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:51:11,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:51:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 06:51:11,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 06:51:11,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 06:51:12,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174228992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:12,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64124093] [2022-11-19 06:51:12,729 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:51:12,729 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:12,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:12,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:12,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:51:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:12,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:12,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:12,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:12,875 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:51:12,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:51:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:12,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-19 06:51:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:12,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 06:51:13,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:13,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:13,069 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:51:13,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 376 [2022-11-19 06:51:13,156 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:13,179 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:13,179 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:13,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,253 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:13,254 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:13,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,361 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:13,362 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:13,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,393 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:13,393 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:13,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,431 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:51:13,431 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-19 06:51:13,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,477 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:13,478 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:13,522 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:13,522 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:13,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,612 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:13,612 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:13,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:13,699 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:13,699 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:13,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:14,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2199#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:51:14,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:14,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:14,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-19 06:51:14,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426365952] [2022-11-19 06:51:14,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:14,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 06:51:14,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 06:51:14,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 06:51:14,387 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 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) [2022-11-19 06:51:14,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:14,525 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2022-11-19 06:51:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 06:51:14,525 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 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 61 [2022-11-19 06:51:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:14,530 INFO L225 Difference]: With dead ends: 126 [2022-11-19 06:51:14,530 INFO L226 Difference]: Without dead ends: 88 [2022-11-19 06:51:14,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 141 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 06:51:14,533 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:14,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:51:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-19 06:51:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-19 06:51:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 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) [2022-11-19 06:51:14,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-11-19 06:51:14,558 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 61 [2022-11-19 06:51:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:14,560 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-11-19 06:51:14,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 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) [2022-11-19 06:51:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-11-19 06:51:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 06:51:14,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:14,563 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:14,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:14,769 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1293335869, now seen corresponding path program 7 times [2022-11-19 06:51:14,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:14,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140906846] [2022-11-19 06:51:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 06:51:17,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:17,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140906846] [2022-11-19 06:51:17,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140906846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:17,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148115942] [2022-11-19 06:51:17,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:51:17,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:17,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:17,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:17,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:51:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 06:51:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 06:51:17,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 06:51:20,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148115942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870944492] [2022-11-19 06:51:20,619 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:51:20,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:20,620 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:20,620 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:20,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:51:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,758 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:51:20,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:51:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-19 06:51:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-19 06:51:20,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:20,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:20,943 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:51:20,943 INFO L350 Elim1Store]: Elim1 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 378 treesize of output 377 [2022-11-19 06:51:21,110 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:21,132 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:21,133 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:21,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:21,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:21,201 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:51:21,201 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:51:21,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:21,257 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:21,258 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:21,280 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:21,280 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:21,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:21,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:21,354 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:21,354 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:21,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:21,431 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:21,432 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:21,453 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:21,454 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:21,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:21,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:21,538 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:21,538 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:21,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:21,613 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:21,614 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:21,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:22,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3229#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:51:22,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:22,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:22,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-19 06:51:22,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684641351] [2022-11-19 06:51:22,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:22,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-19 06:51:22,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-19 06:51:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-19 06:51:22,008 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 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) [2022-11-19 06:51:22,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:22,247 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2022-11-19 06:51:22,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-19 06:51:22,247 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 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 86 [2022-11-19 06:51:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:22,249 INFO L225 Difference]: With dead ends: 176 [2022-11-19 06:51:22,249 INFO L226 Difference]: Without dead ends: 138 [2022-11-19 06:51:22,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-19 06:51:22,255 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:22,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:51:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-19 06:51:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-11-19 06:51:22,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 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) [2022-11-19 06:51:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-11-19 06:51:22,279 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 86 [2022-11-19 06:51:22,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:22,279 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-11-19 06:51:22,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 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) [2022-11-19 06:51:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-11-19 06:51:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 06:51:22,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:22,282 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:22,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:22,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:22,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash 597773443, now seen corresponding path program 8 times [2022-11-19 06:51:22,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:22,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623884819] [2022-11-19 06:51:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 06:51:29,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:29,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623884819] [2022-11-19 06:51:29,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623884819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:30,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527615795] [2022-11-19 06:51:30,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:51:30,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:30,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:30,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:30,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:51:31,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 06:51:31,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:51:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:51:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-11-19 06:51:32,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-11-19 06:51:32,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527615795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:32,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520266831] [2022-11-19 06:51:32,889 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:51:32,889 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:32,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:32,890 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:32,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:51:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:32,995 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-19 06:51:32,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-19 06:51:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:33,142 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:51:33,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:51:33,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:33,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 06:51:33,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:33,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:33,307 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:51:33,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 376 [2022-11-19 06:51:33,420 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:33,443 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:33,443 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:33,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,522 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:51:33,522 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:51:33,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,577 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:33,577 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:33,599 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:33,600 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:33,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,693 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:33,693 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:33,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,790 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:33,791 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:33,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,814 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:33,814 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:33,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:33,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,853 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:51:33,853 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 97 [2022-11-19 06:51:33,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:33,891 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:33,892 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:33,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:34,527 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4781#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:51:34,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:34,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:34,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-19 06:51:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929263660] [2022-11-19 06:51:34,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-19 06:51:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:34,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-19 06:51:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 06:51:34,535 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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) [2022-11-19 06:51:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:34,920 INFO L93 Difference]: Finished difference Result 213 states and 257 transitions. [2022-11-19 06:51:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-19 06:51:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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 136 [2022-11-19 06:51:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:34,922 INFO L225 Difference]: With dead ends: 213 [2022-11-19 06:51:34,923 INFO L226 Difference]: Without dead ends: 175 [2022-11-19 06:51:34,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 06:51:34,927 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:34,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:51:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-19 06:51:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-19 06:51:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 states have internal predecessors, (179), 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) [2022-11-19 06:51:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2022-11-19 06:51:34,939 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 136 [2022-11-19 06:51:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:34,940 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2022-11-19 06:51:34,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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) [2022-11-19 06:51:34,941 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2022-11-19 06:51:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 06:51:34,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:34,943 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:34,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:35,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:35,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:35,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1338517759, now seen corresponding path program 9 times [2022-11-19 06:51:35,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:35,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410266562] [2022-11-19 06:51:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:35,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-19 06:51:43,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:43,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410266562] [2022-11-19 06:51:43,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410266562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:43,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870879885] [2022-11-19 06:51:43,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:51:43,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:43,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:43,199 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:43,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:51:43,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:51:43,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:51:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-19 06:51:43,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-19 06:51:43,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-19 06:51:56,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870879885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:56,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818764484] [2022-11-19 06:51:56,080 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:51:56,080 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:56,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:56,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:56,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:51:56,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,183 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-19 06:51:56,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-19 06:51:56,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,308 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:51:56,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:51:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 06:51:56,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:51:56,476 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:51:56,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 376 [2022-11-19 06:51:56,557 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:56,582 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:56,582 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:56,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:56,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:56,665 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:56,665 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:56,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:56,738 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:56,738 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:56,760 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:56,760 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:56,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:56,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:56,828 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:51:56,828 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:51:56,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:56,887 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:56,887 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:56,908 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:51:56,909 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:56,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:56,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:56,984 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:51:56,985 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:51:57,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:51:57,057 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:51:57,057 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:51:57,071 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:57,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6783#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:51:57,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:57,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:57,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-19 06:51:57,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397725698] [2022-11-19 06:51:57,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:57,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-19 06:51:57,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:57,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-19 06:51:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-19 06:51:57,664 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 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) [2022-11-19 06:51:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:58,326 INFO L93 Difference]: Finished difference Result 350 states and 458 transitions. [2022-11-19 06:51:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-19 06:51:58,327 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 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 173 [2022-11-19 06:51:58,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:58,328 INFO L225 Difference]: With dead ends: 350 [2022-11-19 06:51:58,329 INFO L226 Difference]: Without dead ends: 276 [2022-11-19 06:51:58,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-19 06:51:58,333 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:58,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:51:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-19 06:51:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-19 06:51:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.018181818181818) internal successors, (280), 275 states have internal predecessors, (280), 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) [2022-11-19 06:51:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-11-19 06:51:58,348 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 173 [2022-11-19 06:51:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:58,349 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-11-19 06:51:58,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 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) [2022-11-19 06:51:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-11-19 06:51:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-19 06:51:58,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:58,354 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:58,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 06:51:58,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1563177405, now seen corresponding path program 10 times [2022-11-19 06:51:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:58,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956493593] [2022-11-19 06:51:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:58,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-19 06:52:23,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:23,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956493593] [2022-11-19 06:52:23,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956493593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:23,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504895091] [2022-11-19 06:52:23,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:52:23,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:23,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:23,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:52:23,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:52:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:24,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-19 06:52:24,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-19 06:52:24,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-19 06:53:13,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504895091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:13,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102988949] [2022-11-19 06:53:13,037 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:53:13,037 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:13,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:13,038 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:13,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,146 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-19 06:53:13,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-19 06:53:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,280 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:53:13,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:53:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 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 [2022-11-19 06:53:13,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:13,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:13,426 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:53:13,427 INFO L350 Elim1Store]: Elim1 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 378 treesize of output 377 [2022-11-19 06:53:13,565 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:53:13,587 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:53:13,587 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:53:13,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:13,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:13,667 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:53:13,668 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:53:13,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:13,735 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:53:13,735 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:53:13,759 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:53:13,759 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:53:13,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:13,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:13,844 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 06:53:13,845 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 06:53:13,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:13,910 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:53:13,910 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:53:13,934 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:53:13,934 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:53:13,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:13,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:13,996 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:53:13,997 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:53:14,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:14,061 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:53:14,061 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:53:14,075 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:15,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10069#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:53:15,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:15,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:53:15,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-19 06:53:15,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951579287] [2022-11-19 06:53:15,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:15,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-19 06:53:15,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:15,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-19 06:53:15,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-19 06:53:15,086 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 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) [2022-11-19 06:53:17,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:17,986 INFO L93 Difference]: Finished difference Result 552 states and 761 transitions. [2022-11-19 06:53:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-19 06:53:17,987 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 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 274 [2022-11-19 06:53:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:17,990 INFO L225 Difference]: With dead ends: 552 [2022-11-19 06:53:17,991 INFO L226 Difference]: Without dead ends: 478 [2022-11-19 06:53:17,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-19 06:53:17,997 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:17,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:53:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-11-19 06:53:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2022-11-19 06:53:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.0104821802935011) internal successors, (482), 477 states have internal predecessors, (482), 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) [2022-11-19 06:53:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 482 transitions. [2022-11-19 06:53:18,019 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 482 transitions. Word has length 274 [2022-11-19 06:53:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:18,020 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 482 transitions. [2022-11-19 06:53:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 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) [2022-11-19 06:53:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 482 transitions. [2022-11-19 06:53:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-19 06:53:18,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:18,030 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:18,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:18,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 06:53:18,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2069379837, now seen corresponding path program 11 times [2022-11-19 06:53:18,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:18,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970215564] [2022-11-19 06:53:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:18,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-19 06:55:00,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:00,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970215564] [2022-11-19 06:55:00,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970215564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:00,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864561189] [2022-11-19 06:55:00,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:55:00,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:00,882 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:00,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:55:44,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-19 06:55:44,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:44,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 06:55:44,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81509 trivial. 0 not checked. [2022-11-19 06:55:48,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81509 trivial. 0 not checked. [2022-11-19 06:55:53,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864561189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:53,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650999100] [2022-11-19 06:55:53,137 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 06:55:53,137 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:53,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:53,138 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:53,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,278 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 06:55:53,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 06:55:53,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-19 06:55:53,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 06:55:53,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,425 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:55:53,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 376 [2022-11-19 06:55:53,502 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:55:53,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,523 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:53,523 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:55:53,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,559 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:55:53,559 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 97 [2022-11-19 06:55:53,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,596 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:53,597 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:55:53,617 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:55:53,618 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:55:53,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,687 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 06:55:53,687 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 06:55:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,735 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:53,736 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:55:53,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,762 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:53,763 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:55:53,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:53,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,804 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:55:53,805 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 97 [2022-11-19 06:55:53,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:53,840 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:53,841 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 06:55:53,859 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:55,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15421#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 06:55:55,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:55,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:55,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 25, 25] total 451 [2022-11-19 06:55:55,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634838902] [2022-11-19 06:55:55,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:55,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2022-11-19 06:55:55,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2022-11-19 06:55:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82957, Invalid=124523, Unknown=0, NotChecked=0, Total=207480 [2022-11-19 06:55:55,903 INFO L87 Difference]: Start difference. First operand 478 states and 482 transitions. Second operand has 451 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 451 states have internal predecessors, (465), 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) [2022-11-19 06:56:00,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:00,108 INFO L93 Difference]: Finished difference Result 625 states and 705 transitions. [2022-11-19 06:56:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-19 06:56:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 451 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 451 states have internal predecessors, (465), 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 476 [2022-11-19 06:56:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:00,113 INFO L225 Difference]: With dead ends: 625 [2022-11-19 06:56:00,113 INFO L226 Difference]: Without dead ends: 551 [2022-11-19 06:56:00,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1830 GetRequests, 1376 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20837 ImplicationChecksByTransitivity, 74.1s TimeCoverageRelationStatistics Valid=82957, Invalid=124523, Unknown=0, NotChecked=0, Total=207480 [2022-11-19 06:56:00,124 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:00,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:56:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-19 06:56:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2022-11-19 06:56:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.009090909090909) internal successors, (555), 550 states have internal predecessors, (555), 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) [2022-11-19 06:56:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 555 transitions. [2022-11-19 06:56:00,148 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 555 transitions. Word has length 476 [2022-11-19 06:56:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:00,149 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 555 transitions. [2022-11-19 06:56:00,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 451 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 451 states have internal predecessors, (465), 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) [2022-11-19 06:56:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 555 transitions. [2022-11-19 06:56:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-11-19 06:56:00,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:00,164 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:00,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:00,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 06:56:00,379 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:00,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash 290057217, now seen corresponding path program 12 times [2022-11-19 06:56:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:56:00,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937600318] [2022-11-19 06:56:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:00,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:56:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-11-19 06:57:56,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:56,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937600318] [2022-11-19 06:57:56,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937600318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:56,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209199424] [2022-11-19 06:57:56,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:57:56,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:56,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:56,774 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:56,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 06:57:58,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:57:58,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:57:58,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 4694 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-19 06:57:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-11-19 06:57:58,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-11-19 07:01:17,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209199424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:17,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207875578] [2022-11-19 07:01:17,926 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:01:17,927 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:17,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:01:17,927 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:01:17,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:01:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:17,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:17,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:18,057 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-19 07:01:18,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-19 07:01:18,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:18,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:18,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-19 07:01:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:18,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:01:18,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:18,193 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:01:18,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 376 [2022-11-19 07:01:18,263 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:01:18,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,287 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:01:18,287 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:01:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:18,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,325 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:01:18,325 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 97 [2022-11-19 07:01:18,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,359 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:01:18,359 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:01:18,381 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:01:18,381 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:01:18,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,446 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:01:18,446 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 101 [2022-11-19 07:01:18,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,488 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:01:18,489 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:01:18,515 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:01:18,515 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:01:18,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,582 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:01:18,582 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 111 [2022-11-19 07:01:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:01:18,648 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:01:18,648 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 07:01:18,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:01:20,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21863#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-11-19 07:01:20,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:01:20,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:20,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-19 07:01:20,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335946077] [2022-11-19 07:01:20,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:20,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-19 07:01:20,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-19 07:01:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-11-19 07:01:20,698 INFO L87 Difference]: Start difference. First operand 551 states and 555 transitions. Second operand has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 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) [2022-11-19 07:01:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:41,245 INFO L93 Difference]: Finished difference Result 1102 states and 1514 transitions. [2022-11-19 07:01:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-19 07:01:41,246 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 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 549 [2022-11-19 07:01:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:41,250 INFO L225 Difference]: With dead ends: 1102 [2022-11-19 07:01:41,251 INFO L226 Difference]: Without dead ends: 956 [2022-11-19 07:01:41,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2050 GetRequests, 1236 SyntacticMatches, 0 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7672 ImplicationChecksByTransitivity, 263.9s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-11-19 07:01:41,292 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:41,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:01:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-11-19 07:01:41,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 956. [2022-11-19 07:01:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.0052356020942408) internal successors, (960), 955 states have internal predecessors, (960), 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) [2022-11-19 07:01:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 960 transitions. [2022-11-19 07:01:41,332 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 960 transitions. Word has length 549 [2022-11-19 07:01:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:41,333 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 960 transitions. [2022-11-19 07:01:41,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 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) [2022-11-19 07:01:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 960 transitions. [2022-11-19 07:01:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-11-19 07:01:41,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:41,343 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:41,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:41,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f688d5ec-76f9-4fa2-be2c-387b5593eea3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:41,551 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:01:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:41,551 INFO L85 PathProgramCache]: Analyzing trace with hash -743735485, now seen corresponding path program 13 times [2022-11-19 07:01:41,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:41,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020803640] [2022-11-19 07:01:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:41,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat