./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/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_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 970cab0a23b690f163a0a51afef8881644c6447187bc11bbe1f60a2a40cf01a7 --- 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 08:34:10,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:34:10,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:34:10,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:34:10,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:34:10,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:34:10,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:34:10,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:34:10,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:34:10,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:34:10,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:34:10,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:34:10,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:34:10,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:34:10,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:34:10,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:34:10,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:34:10,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:34:10,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:34:10,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:34:10,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:34:10,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:34:10,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:34:10,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:34:10,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:34:10,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:34:10,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:34:10,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:34:10,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:34:10,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:34:10,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:34:10,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:34:10,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:34:10,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:34:10,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:34:10,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:34:10,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:34:10,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:34:10,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:34:10,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:34:10,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:34:10,965 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:34:10,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:34:10,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:34:10,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:34:10,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:34:10,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:34:10,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:34:10,989 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:34:10,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:34:10,989 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:34:10,989 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:34:10,990 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:34:10,990 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:34:10,990 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:34:10,990 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:34:10,991 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:34:10,991 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:34:10,991 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:34:10,991 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:34:10,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:34:10,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:34:10,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:34:10,993 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:34:10,993 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:34:10,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:34:10,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:34:10,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:34:10,994 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:34:10,994 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:34:10,994 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:34:10,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:34:10,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:34:10,995 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:34:10,995 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:34:10,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:34:10,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:34:10,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:34:10,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:34:10,996 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:34:10,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:34:10,997 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:34:10,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:34:10,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:34:10,998 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_480e1ad3-bf48-49eb-a931-79fe36d7b95d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 970cab0a23b690f163a0a51afef8881644c6447187bc11bbe1f60a2a40cf01a7 [2022-11-19 08:34:11,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:34:11,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:34:11,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:34:11,247 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:34:11,248 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:34:11,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2022-11-19 08:34:11,322 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/data/f121af064/b174c1abf3924e38838b1324fd2c43a3/FLAG3219e9bd1 [2022-11-19 08:34:11,887 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:34:11,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2022-11-19 08:34:11,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/data/f121af064/b174c1abf3924e38838b1324fd2c43a3/FLAG3219e9bd1 [2022-11-19 08:34:12,223 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/data/f121af064/b174c1abf3924e38838b1324fd2c43a3 [2022-11-19 08:34:12,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:34:12,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:34:12,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:12,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:34:12,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:34:12,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6889690c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12, skipping insertion in model container [2022-11-19 08:34:12,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:34:12,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:34:12,452 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_480e1ad3-bf48-49eb-a931-79fe36d7b95d/sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2022-11-19 08:34:12,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:12,503 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:34:12,515 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_480e1ad3-bf48-49eb-a931-79fe36d7b95d/sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2022-11-19 08:34:12,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:12,546 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:34:12,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12 WrapperNode [2022-11-19 08:34:12,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:12,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:34:12,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:34:12,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:34:12,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,599 INFO L138 Inliner]: procedures = 42, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 152 [2022-11-19 08:34:12,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:34:12,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:34:12,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:34:12,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:34:12,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:34:12,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:34:12,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:34:12,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:34:12,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (1/1) ... [2022-11-19 08:34:12,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:34:12,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:12,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:34:12,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:34:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:34:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:34:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:34:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:34:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:34:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-11-19 08:34:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:34:12,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:34:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:34:12,853 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:34:12,860 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:34:13,354 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:34:13,406 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:34:13,407 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 08:34:13,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:34:13 BoogieIcfgContainer [2022-11-19 08:34:13,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:34:13,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:34:13,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:34:13,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:34:13,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:34:12" (1/3) ... [2022-11-19 08:34:13,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5094a7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:34:13, skipping insertion in model container [2022-11-19 08:34:13,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:12" (2/3) ... [2022-11-19 08:34:13,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5094a7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:34:13, skipping insertion in model container [2022-11-19 08:34:13,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:34:13" (3/3) ... [2022-11-19 08:34:13,421 INFO L112 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2022-11-19 08:34:13,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:34:13,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-11-19 08:34:13,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:34:13,530 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3842231, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:34:13,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-11-19 08:34:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 2.111111111111111) internal successors, (76), 60 states have internal predecessors, (76), 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 08:34:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:34:13,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:13,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:34:13,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:13,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash 211720, now seen corresponding path program 1 times [2022-11-19 08:34:13,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:13,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027171810] [2022-11-19 08:34:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:13,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:13,805 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 08:34:13,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:13,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027171810] [2022-11-19 08:34:13,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027171810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:13,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:13,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:13,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771076893] [2022-11-19 08:34:13,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:13,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:13,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:13,860 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 2.111111111111111) internal successors, (76), 60 states have internal predecessors, (76), 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 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:13,982 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-11-19 08:34:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:13,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:34:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:13,994 INFO L225 Difference]: With dead ends: 65 [2022-11-19 08:34:13,995 INFO L226 Difference]: Without dead ends: 64 [2022-11-19 08:34:13,996 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 08:34:14,000 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:14,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 110 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-19 08:34:14,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2022-11-19 08:34:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.945945945945946) internal successors, (72), 60 states have internal predecessors, (72), 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 08:34:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-11-19 08:34:14,041 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 3 [2022-11-19 08:34:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:14,041 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-11-19 08:34:14,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-11-19 08:34:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:34:14,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:14,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:34:14,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:34:14,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:14,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash 205976, now seen corresponding path program 1 times [2022-11-19 08:34:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:14,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922356740] [2022-11-19 08:34:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:14,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:14,101 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 08:34:14,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:14,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922356740] [2022-11-19 08:34:14,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922356740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:14,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:14,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:34:14,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955890644] [2022-11-19 08:34:14,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:14,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:14,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:14,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:14,105 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:14,168 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-11-19 08:34:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:14,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:34:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:14,169 INFO L225 Difference]: With dead ends: 59 [2022-11-19 08:34:14,169 INFO L226 Difference]: Without dead ends: 59 [2022-11-19 08:34:14,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 08:34:14,171 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:14,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 39 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-19 08:34:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-19 08:34:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-11-19 08:34:14,179 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 3 [2022-11-19 08:34:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:14,180 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-11-19 08:34:14,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-11-19 08:34:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:34:14,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:14,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:34:14,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:34:14,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:14,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:14,182 INFO L85 PathProgramCache]: Analyzing trace with hash 205977, now seen corresponding path program 1 times [2022-11-19 08:34:14,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:14,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013273351] [2022-11-19 08:34:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:14,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:14,278 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 08:34:14,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013273351] [2022-11-19 08:34:14,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013273351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:14,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:14,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:34:14,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151270027] [2022-11-19 08:34:14,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:14,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:14,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:14,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:14,282 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:14,345 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-11-19 08:34:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:14,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:34:14,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:14,347 INFO L225 Difference]: With dead ends: 60 [2022-11-19 08:34:14,347 INFO L226 Difference]: Without dead ends: 60 [2022-11-19 08:34:14,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 08:34:14,349 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:14,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-19 08:34:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-19 08:34:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.868421052631579) internal successors, (71), 59 states have internal predecessors, (71), 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 08:34:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-11-19 08:34:14,355 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 3 [2022-11-19 08:34:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:14,356 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-11-19 08:34:14,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-11-19 08:34:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:34:14,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:14,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:34:14,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:34:14,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:14,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:14,358 INFO L85 PathProgramCache]: Analyzing trace with hash 198119100, now seen corresponding path program 1 times [2022-11-19 08:34:14,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:14,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344139139] [2022-11-19 08:34:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:14,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:14,408 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 08:34:14,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344139139] [2022-11-19 08:34:14,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344139139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615930639] [2022-11-19 08:34:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:14,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:14,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:14,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:14,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:34:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:14,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:34:14,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:14,534 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 08:34:14,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:14,560 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 08:34:14,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615930639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:14,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816535988] [2022-11-19 08:34:14,587 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 08:34:14,587 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:14,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:14,599 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:14,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:14,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:14,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:14,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:14,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:15,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:15,079 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:15,079 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:15,215 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 14 treesize of output 10 [2022-11-19 08:34:15,228 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:15,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '468#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 9)) (<= 8 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:15,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:15,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:15,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 08:34:15,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833101564] [2022-11-19 08:34:15,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:15,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:34:15,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:34:15,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:34:15,318 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 08:34:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:15,413 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-11-19 08:34:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:34:15,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 5 [2022-11-19 08:34:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:15,415 INFO L225 Difference]: With dead ends: 67 [2022-11-19 08:34:15,415 INFO L226 Difference]: Without dead ends: 67 [2022-11-19 08:34:15,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:34:15,416 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:15,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 159 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-19 08:34:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-11-19 08:34:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.813953488372093) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-11-19 08:34:15,422 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 5 [2022-11-19 08:34:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:15,422 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-11-19 08:34:15,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 08:34:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-11-19 08:34:15,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:34:15,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:15,423 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-19 08:34:15,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:15,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:15,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:15,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash 198113356, now seen corresponding path program 1 times [2022-11-19 08:34:15,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:15,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830949823] [2022-11-19 08:34:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:15,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:15,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:15,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830949823] [2022-11-19 08:34:15,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830949823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:15,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662048530] [2022-11-19 08:34:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:15,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:15,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:15,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:15,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:34:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:34:15,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:15,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-19 08:34:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:15,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:15,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662048530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:15,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931233473] [2022-11-19 08:34:15,977 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-19 08:34:15,978 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:15,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:15,978 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:15,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:15,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:16,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:16,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:16,139 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:16,140 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:16,219 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 14 treesize of output 10 [2022-11-19 08:34:16,229 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:16,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '637#(and (<= |ULTIMATE.start_main_#t~nondet22#1| 127) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (< |ULTIMATE.start_main_~i~1#1| 8) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet22#1|)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#A~0#1.offset| |ULTIMATE.start_main_~i~1#1| 1) (select |#length| |ULTIMATE.start_main_~#A~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:16,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:16,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-11-19 08:34:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244781097] [2022-11-19 08:34:16,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:16,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:34:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:34:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:34:16,345 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 08:34:16,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:16,527 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-11-19 08:34:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:34:16,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:34:16,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:16,529 INFO L225 Difference]: With dead ends: 63 [2022-11-19 08:34:16,529 INFO L226 Difference]: Without dead ends: 63 [2022-11-19 08:34:16,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:34:16,530 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 125 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:16,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 125 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-19 08:34:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-19 08:34:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 62 states have internal predecessors, (74), 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 08:34:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-11-19 08:34:16,535 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 5 [2022-11-19 08:34:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:16,536 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-11-19 08:34:16,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 08:34:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-11-19 08:34:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:34:16,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:16,537 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:16,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:16,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:16,742 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:16,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash -733126741, now seen corresponding path program 1 times [2022-11-19 08:34:16,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:16,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677349490] [2022-11-19 08:34:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:16,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:34:16,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:16,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677349490] [2022-11-19 08:34:16,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677349490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:16,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:16,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847889970] [2022-11-19 08:34:16,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:16,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:34:16,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:34:16,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:16,869 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 08:34:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:16,922 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-11-19 08:34:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:34:16,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 14 [2022-11-19 08:34:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:16,924 INFO L225 Difference]: With dead ends: 63 [2022-11-19 08:34:16,924 INFO L226 Difference]: Without dead ends: 63 [2022-11-19 08:34:16,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:34:16,925 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 60 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:16,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 36 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:34:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-19 08:34:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-19 08:34:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.697674418604651) internal successors, (73), 62 states have internal predecessors, (73), 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 08:34:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-11-19 08:34:16,929 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 14 [2022-11-19 08:34:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:16,930 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-11-19 08:34:16,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 08:34:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-11-19 08:34:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:34:16,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:16,930 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:16,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:34:16,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:16,931 INFO L85 PathProgramCache]: Analyzing trace with hash -733129331, now seen corresponding path program 1 times [2022-11-19 08:34:16,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:16,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554785559] [2022-11-19 08:34:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:16,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:17,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:17,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554785559] [2022-11-19 08:34:17,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554785559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:17,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906746433] [2022-11-19 08:34:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:17,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:17,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:17,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:17,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:34:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:34:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:17,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:17,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906746433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:17,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900615453] [2022-11-19 08:34:17,224 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 08:34:17,224 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:17,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:17,225 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:17,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:17,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:17,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:17,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:17,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:17,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:17,402 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:17,403 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:17,484 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 14 treesize of output 10 [2022-11-19 08:34:17,521 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:17,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:17,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:34:17,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:34:17,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:18,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1900615453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:18,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:18,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6] total 16 [2022-11-19 08:34:18,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425517797] [2022-11-19 08:34:18,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:18,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:34:18,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:34:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:34:18,028 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 08:34:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:18,309 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2022-11-19 08:34:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:34:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 14 [2022-11-19 08:34:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:18,310 INFO L225 Difference]: With dead ends: 76 [2022-11-19 08:34:18,310 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 08:34:18,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:34:18,311 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 156 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:18,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 150 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:34:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 08:34:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-11-19 08:34:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 72 states have internal predecessors, (86), 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 08:34:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2022-11-19 08:34:18,317 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 14 [2022-11-19 08:34:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:18,317 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2022-11-19 08:34:18,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 08:34:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2022-11-19 08:34:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:34:18,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:18,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:18,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:18,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:34:18,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash -872778995, now seen corresponding path program 1 times [2022-11-19 08:34:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:18,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076333884] [2022-11-19 08:34:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 08:34:18,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076333884] [2022-11-19 08:34:18,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076333884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:18,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:18,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:18,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394069011] [2022-11-19 08:34:18,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:18,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:18,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:18,587 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 08:34:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:18,652 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-11-19 08:34:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 08:34:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:18,655 INFO L225 Difference]: With dead ends: 65 [2022-11-19 08:34:18,655 INFO L226 Difference]: Without dead ends: 65 [2022-11-19 08:34:18,655 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 08:34:18,656 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:18,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 31 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-19 08:34:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-19 08:34:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.471698113207547) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-11-19 08:34:18,671 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 19 [2022-11-19 08:34:18,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:18,671 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-11-19 08:34:18,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 08:34:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-11-19 08:34:18,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:34:18,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:18,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:18,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:34:18,673 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash -872778994, now seen corresponding path program 1 times [2022-11-19 08:34:18,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:18,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409817349] [2022-11-19 08:34:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:18,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:34:18,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409817349] [2022-11-19 08:34:18,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409817349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915251255] [2022-11-19 08:34:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:18,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:18,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:18,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:34:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:18,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:34:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:34:18,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:34:18,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915251255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:18,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825616526] [2022-11-19 08:34:18,997 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 08:34:18,997 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:18,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:18,998 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:18,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:19,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:19,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:19,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:19,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:19,149 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:19,149 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:19,242 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 14 treesize of output 10 [2022-11-19 08:34:19,275 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:19,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:19,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:34:19,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:34:19,392 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:20,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1825616526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:20,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:20,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6, 6] total 19 [2022-11-19 08:34:20,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685043485] [2022-11-19 08:34:20,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:20,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:34:20,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:34:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:34:20,450 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 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 08:34:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:20,769 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2022-11-19 08:34:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:34:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 08:34:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:20,770 INFO L225 Difference]: With dead ends: 78 [2022-11-19 08:34:20,770 INFO L226 Difference]: Without dead ends: 78 [2022-11-19 08:34:20,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:34:20,772 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 149 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:20,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 129 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:34:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-19 08:34:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-11-19 08:34:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 71 states have internal predecessors, (86), 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 08:34:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-11-19 08:34:20,776 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 19 [2022-11-19 08:34:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:20,776 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-11-19 08:34:20,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 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 08:34:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-11-19 08:34:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:34:20,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:20,778 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:20,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:20,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:20,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2038937515, now seen corresponding path program 1 times [2022-11-19 08:34:20,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:20,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170050619] [2022-11-19 08:34:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:20,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:34:21,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:21,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170050619] [2022-11-19 08:34:21,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170050619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:21,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807127074] [2022-11-19 08:34:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:21,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:21,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:21,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:21,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:34:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:34:21,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:34:21,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:34:21,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807127074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:21,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583072525] [2022-11-19 08:34:21,260 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 08:34:21,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:21,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:21,261 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:21,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:21,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:21,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:21,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:21,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:21,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:21,419 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:21,420 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:21,491 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 14 treesize of output 10 [2022-11-19 08:34:21,518 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:21,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:34:21,544 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:21,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:21,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:34:21,688 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:22,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1680#(and (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1) 0) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (= |ULTIMATE.start_parse_expression_list_~start~0#1| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~i~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:22,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:22,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:22,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-19 08:34:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971909450] [2022-11-19 08:34:22,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:22,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:34:22,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:22,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:34:22,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:34:22,736 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 08:34:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:22,796 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2022-11-19 08:34:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:34:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 08:34:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:22,797 INFO L225 Difference]: With dead ends: 80 [2022-11-19 08:34:22,797 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 08:34:22,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:34:22,799 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:22,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 08:34:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-19 08:34:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 79 states have internal predecessors, (94), 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 08:34:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2022-11-19 08:34:22,803 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 20 [2022-11-19 08:34:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:22,803 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2022-11-19 08:34:22,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 08:34:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2022-11-19 08:34:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:34:22,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:22,804 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:22,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:23,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:34:23,011 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1346318625, now seen corresponding path program 2 times [2022-11-19 08:34:23,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:23,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641372144] [2022-11-19 08:34:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:34:23,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:23,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641372144] [2022-11-19 08:34:23,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641372144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:23,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659226841] [2022-11-19 08:34:23,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:34:23,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:23,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:23,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:23,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:34:23,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:34:23,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:23,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:34:23,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:23,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-19 08:34:23,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-19 08:34:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:23,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:34:23,557 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:34:23,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 08:34:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:23,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:24,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659226841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:24,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524163783] [2022-11-19 08:34:24,049 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 08:34:24,050 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:24,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:24,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:24,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:24,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:24,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:24,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:24,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:24,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:24,193 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:24,193 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:24,250 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 14 treesize of output 10 [2022-11-19 08:34:24,279 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:24,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:24,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:34:24,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:34:24,410 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:25,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2028#(and (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1) 0) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (= |ULTIMATE.start_parse_expression_list_~start~0#1| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~i~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:25,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:25,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:25,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-11-19 08:34:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87783215] [2022-11-19 08:34:25,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:25,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:34:25,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:34:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:34:25,581 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 08:34:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:26,071 INFO L93 Difference]: Finished difference Result 234 states and 281 transitions. [2022-11-19 08:34:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:34:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 28 [2022-11-19 08:34:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:26,073 INFO L225 Difference]: With dead ends: 234 [2022-11-19 08:34:26,073 INFO L226 Difference]: Without dead ends: 234 [2022-11-19 08:34:26,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:34:26,074 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 766 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:26,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 410 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 271 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-11-19 08:34:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-19 08:34:26,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 179. [2022-11-19 08:34:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 168 states have (on average 1.5654761904761905) internal successors, (263), 178 states have internal predecessors, (263), 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 08:34:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 263 transitions. [2022-11-19 08:34:26,082 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 263 transitions. Word has length 28 [2022-11-19 08:34:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:26,082 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 263 transitions. [2022-11-19 08:34:26,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 08:34:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 263 transitions. [2022-11-19 08:34:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:34:26,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:26,083 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:26,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:26,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:34:26,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1213874035, now seen corresponding path program 1 times [2022-11-19 08:34:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:26,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568875226] [2022-11-19 08:34:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:26,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:26,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:26,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568875226] [2022-11-19 08:34:26,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568875226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:26,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:26,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:34:26,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329719941] [2022-11-19 08:34:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:26,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:26,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:26,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:26,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:26,394 INFO L87 Difference]: Start difference. First operand 179 states and 263 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 08:34:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:26,471 INFO L93 Difference]: Finished difference Result 202 states and 285 transitions. [2022-11-19 08:34:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:26,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-19 08:34:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:26,474 INFO L225 Difference]: With dead ends: 202 [2022-11-19 08:34:26,474 INFO L226 Difference]: Without dead ends: 202 [2022-11-19 08:34:26,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:26,475 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:26,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 102 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-19 08:34:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2022-11-19 08:34:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 183 states have (on average 1.5191256830601092) internal successors, (278), 193 states have internal predecessors, (278), 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 08:34:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 278 transitions. [2022-11-19 08:34:26,490 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 278 transitions. Word has length 29 [2022-11-19 08:34:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:26,491 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 278 transitions. [2022-11-19 08:34:26,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 08:34:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 278 transitions. [2022-11-19 08:34:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:34:26,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:26,494 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:26,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:34:26,495 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1026901929, now seen corresponding path program 1 times [2022-11-19 08:34:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329765538] [2022-11-19 08:34:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:26,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 08:34:26,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:26,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329765538] [2022-11-19 08:34:26,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329765538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:26,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336364832] [2022-11-19 08:34:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:26,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:26,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:26,695 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:26,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:34:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:26,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:34:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:26,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:26,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-19 08:34:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:27,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336364832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:27,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1651825821] [2022-11-19 08:34:27,062 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 08:34:27,063 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:27,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:27,063 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:27,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:27,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:27,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:27,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:27,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:27,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:27,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:27,190 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:27,191 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:27,262 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 14 treesize of output 10 [2022-11-19 08:34:27,289 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:27,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:34:27,300 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 13 treesize of output 9 [2022-11-19 08:34:27,325 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:27,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:27,450 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:28,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1651825821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:28,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:28,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 5, 5] total 22 [2022-11-19 08:34:28,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327133036] [2022-11-19 08:34:28,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:28,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:34:28,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:34:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:34:28,576 INFO L87 Difference]: Start difference. First operand 194 states and 278 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:28,833 INFO L93 Difference]: Finished difference Result 241 states and 337 transitions. [2022-11-19 08:34:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:34:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-19 08:34:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:28,835 INFO L225 Difference]: With dead ends: 241 [2022-11-19 08:34:28,835 INFO L226 Difference]: Without dead ends: 241 [2022-11-19 08:34:28,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:34:28,836 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 90 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:28,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 145 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:34:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-19 08:34:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-11-19 08:34:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 229 states have (on average 1.4716157205240175) internal successors, (337), 239 states have internal predecessors, (337), 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 08:34:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 337 transitions. [2022-11-19 08:34:28,842 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 337 transitions. Word has length 30 [2022-11-19 08:34:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:28,843 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 337 transitions. [2022-11-19 08:34:28,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 337 transitions. [2022-11-19 08:34:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 08:34:28,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:28,844 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:28,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:29,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:29,050 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:29,050 INFO L85 PathProgramCache]: Analyzing trace with hash -939704188, now seen corresponding path program 1 times [2022-11-19 08:34:29,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:29,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729038181] [2022-11-19 08:34:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:29,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:29,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:29,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729038181] [2022-11-19 08:34:29,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729038181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:29,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:29,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:34:29,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064486854] [2022-11-19 08:34:29,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:29,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:34:29,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:29,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:34:29,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:29,141 INFO L87 Difference]: Start difference. First operand 240 states and 337 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) 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 08:34:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:29,255 INFO L93 Difference]: Finished difference Result 281 states and 379 transitions. [2022-11-19 08:34:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:34:29,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) 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 31 [2022-11-19 08:34:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:29,258 INFO L225 Difference]: With dead ends: 281 [2022-11-19 08:34:29,258 INFO L226 Difference]: Without dead ends: 281 [2022-11-19 08:34:29,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:34:29,259 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 82 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:29,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 160 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-19 08:34:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 233. [2022-11-19 08:34:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 222 states have (on average 1.445945945945946) internal successors, (321), 232 states have internal predecessors, (321), 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 08:34:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 321 transitions. [2022-11-19 08:34:29,266 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 321 transitions. Word has length 31 [2022-11-19 08:34:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:29,266 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 321 transitions. [2022-11-19 08:34:29,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) 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 08:34:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 321 transitions. [2022-11-19 08:34:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:34:29,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:29,270 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:29,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:34:29,270 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash 620962909, now seen corresponding path program 1 times [2022-11-19 08:34:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:29,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80986114] [2022-11-19 08:34:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:29,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:29,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80986114] [2022-11-19 08:34:29,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80986114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:29,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866089604] [2022-11-19 08:34:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:29,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:29,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:29,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:29,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:34:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:29,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:34:29,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:29,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:29,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-19 08:34:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866089604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687352439] [2022-11-19 08:34:29,903 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:34:29,903 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:29,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:29,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:29,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:29,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:29,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:29,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:29,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:29,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:29,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:30,050 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:30,050 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:30,111 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 14 treesize of output 10 [2022-11-19 08:34:30,137 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:30,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:34:30,147 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 13 treesize of output 9 [2022-11-19 08:34:30,172 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:30,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:30,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:32,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4288#(and (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1) 0) (<= 1 |ULTIMATE.start_parse_expression_list_~start~0#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (<= |#NULL.base| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_parse_expression_list_#t~mem4#1|) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_parse_expression_list_#t~mem4#1| 0))' at error location [2022-11-19 08:34:32,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:32,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:32,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2022-11-19 08:34:32,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339674829] [2022-11-19 08:34:32,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:32,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:34:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:34:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:34:32,199 INFO L87 Difference]: Start difference. First operand 233 states and 321 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 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 08:34:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:32,881 INFO L93 Difference]: Finished difference Result 505 states and 704 transitions. [2022-11-19 08:34:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 08:34:32,882 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 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 33 [2022-11-19 08:34:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:32,884 INFO L225 Difference]: With dead ends: 505 [2022-11-19 08:34:32,884 INFO L226 Difference]: Without dead ends: 505 [2022-11-19 08:34:32,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=406, Invalid=1850, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 08:34:32,885 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 400 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:32,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 507 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:34:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-19 08:34:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 245. [2022-11-19 08:34:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 236 states have (on average 1.4152542372881356) internal successors, (334), 244 states have internal predecessors, (334), 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 08:34:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 334 transitions. [2022-11-19 08:34:32,896 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 334 transitions. Word has length 33 [2022-11-19 08:34:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:32,897 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 334 transitions. [2022-11-19 08:34:32,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 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 08:34:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 334 transitions. [2022-11-19 08:34:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 08:34:32,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:32,898 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:32,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:33,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:34:33,105 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash -114283956, now seen corresponding path program 1 times [2022-11-19 08:34:33,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:33,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375228017] [2022-11-19 08:34:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:33,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:33,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:33,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375228017] [2022-11-19 08:34:33,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375228017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:33,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:33,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:34:33,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231537166] [2022-11-19 08:34:33,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:33,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:33,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:33,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:33,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:33,214 INFO L87 Difference]: Start difference. First operand 245 states and 334 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 08:34:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:33,296 INFO L93 Difference]: Finished difference Result 355 states and 483 transitions. [2022-11-19 08:34:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:34:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 34 [2022-11-19 08:34:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:33,298 INFO L225 Difference]: With dead ends: 355 [2022-11-19 08:34:33,298 INFO L226 Difference]: Without dead ends: 355 [2022-11-19 08:34:33,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:33,299 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:33,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 113 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-19 08:34:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 252. [2022-11-19 08:34:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 243 states have (on average 1.3991769547325104) internal successors, (340), 251 states have internal predecessors, (340), 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 08:34:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 340 transitions. [2022-11-19 08:34:33,306 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 340 transitions. Word has length 34 [2022-11-19 08:34:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:33,307 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 340 transitions. [2022-11-19 08:34:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 08:34:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 340 transitions. [2022-11-19 08:34:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:34:33,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:33,308 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:33,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:34:33,308 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash 684519712, now seen corresponding path program 1 times [2022-11-19 08:34:33,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:33,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733982843] [2022-11-19 08:34:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:34:33,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:33,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733982843] [2022-11-19 08:34:33,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733982843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:33,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:33,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:33,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052007949] [2022-11-19 08:34:33,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:33,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:33,347 INFO L87 Difference]: Start difference. First operand 252 states and 340 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 08:34:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:33,375 INFO L93 Difference]: Finished difference Result 260 states and 348 transitions. [2022-11-19 08:34:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 36 [2022-11-19 08:34:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:33,377 INFO L225 Difference]: With dead ends: 260 [2022-11-19 08:34:33,377 INFO L226 Difference]: Without dead ends: 260 [2022-11-19 08:34:33,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 08:34:33,378 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:33,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:34:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-19 08:34:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-11-19 08:34:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 251 states have (on average 1.3864541832669324) internal successors, (348), 259 states have internal predecessors, (348), 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 08:34:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 348 transitions. [2022-11-19 08:34:33,384 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 348 transitions. Word has length 36 [2022-11-19 08:34:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:33,384 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 348 transitions. [2022-11-19 08:34:33,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 08:34:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 348 transitions. [2022-11-19 08:34:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:34:33,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:33,385 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 08:34:33,386 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash 686158487, now seen corresponding path program 2 times [2022-11-19 08:34:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:33,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778562601] [2022-11-19 08:34:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:33,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-19 08:34:33,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778562601] [2022-11-19 08:34:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778562601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836026551] [2022-11-19 08:34:33,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:34:33,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:33,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:33,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:33,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:34:33,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:34:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:33,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:34:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:34,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:34,101 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 08:34:34,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-11-19 08:34:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:34,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836026551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88514191] [2022-11-19 08:34:34,216 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:34:34,216 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:34,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:34,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:34,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:34,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:34,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:34,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:34,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:34,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:34,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:34,342 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:34,343 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:34,404 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 14 treesize of output 10 [2022-11-19 08:34:34,419 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 13 treesize of output 9 [2022-11-19 08:34:34,436 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:34:34,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:34:34,462 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:34,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:34,707 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:36,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6449#(and (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1) 0) (<= 1 |ULTIMATE.start_parse_expression_list_~start~0#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (<= |#NULL.base| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_parse_expression_list_#t~mem4#1|) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_parse_expression_list_#t~mem4#1| 0))' at error location [2022-11-19 08:34:36,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:36,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:36,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 10] total 22 [2022-11-19 08:34:36,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461495545] [2022-11-19 08:34:36,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:36,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:34:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:36,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:34:36,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:34:36,619 INFO L87 Difference]: Start difference. First operand 260 states and 348 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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 08:34:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:38,886 INFO L93 Difference]: Finished difference Result 499 states and 648 transitions. [2022-11-19 08:34:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-19 08:34:38,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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 36 [2022-11-19 08:34:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:38,888 INFO L225 Difference]: With dead ends: 499 [2022-11-19 08:34:38,888 INFO L226 Difference]: Without dead ends: 499 [2022-11-19 08:34:38,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=665, Invalid=5977, Unknown=0, NotChecked=0, Total=6642 [2022-11-19 08:34:38,891 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 541 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:38,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 885 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:34:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-19 08:34:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 359. [2022-11-19 08:34:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 350 states have (on average 1.3742857142857143) internal successors, (481), 358 states have internal predecessors, (481), 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 08:34:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 481 transitions. [2022-11-19 08:34:38,903 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 481 transitions. Word has length 36 [2022-11-19 08:34:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:38,903 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 481 transitions. [2022-11-19 08:34:38,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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 08:34:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 481 transitions. [2022-11-19 08:34:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:34:38,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:38,904 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:38,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:39,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:34:39,114 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:39,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1283659593, now seen corresponding path program 1 times [2022-11-19 08:34:39,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:39,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280286903] [2022-11-19 08:34:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:39,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:34:39,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:39,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280286903] [2022-11-19 08:34:39,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280286903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:39,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:39,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:39,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625284224] [2022-11-19 08:34:39,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:39,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:34:39,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:34:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:39,351 INFO L87 Difference]: Start difference. First operand 359 states and 481 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 08:34:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:39,412 INFO L93 Difference]: Finished difference Result 358 states and 480 transitions. [2022-11-19 08:34:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:34:39,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 08:34:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:39,415 INFO L225 Difference]: With dead ends: 358 [2022-11-19 08:34:39,415 INFO L226 Difference]: Without dead ends: 355 [2022-11-19 08:34:39,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:34:39,416 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:39,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 99 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-19 08:34:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2022-11-19 08:34:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 347 states have (on average 1.3256484149855907) internal successors, (460), 354 states have internal predecessors, (460), 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 08:34:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 460 transitions. [2022-11-19 08:34:39,426 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 460 transitions. Word has length 37 [2022-11-19 08:34:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:39,427 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 460 transitions. [2022-11-19 08:34:39,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 08:34:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 460 transitions. [2022-11-19 08:34:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:34:39,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:39,428 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:39,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 08:34:39,428 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:39,428 INFO L85 PathProgramCache]: Analyzing trace with hash 569083399, now seen corresponding path program 1 times [2022-11-19 08:34:39,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:39,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874902103] [2022-11-19 08:34:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:39,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:39,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:39,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874902103] [2022-11-19 08:34:39,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874902103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:39,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839625897] [2022-11-19 08:34:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:39,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:39,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:39,547 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:39,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:34:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:39,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:34:39,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:39,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:39,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839625897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:39,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28337834] [2022-11-19 08:34:39,745 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 08:34:39,745 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:39,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:39,746 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:39,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:39,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:39,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:39,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:39,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 08:34:39,863 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-19 08:34:39,864 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 199 treesize of output 189 [2022-11-19 08:34:39,914 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 14 treesize of output 10 [2022-11-19 08:34:39,946 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:39,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:39,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:34:39,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:34:40,143 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:42,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [28337834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:42,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:42,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [7, 7, 7] total 25 [2022-11-19 08:34:42,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297956922] [2022-11-19 08:34:42,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:42,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:34:42,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:42,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:34:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:34:42,481 INFO L87 Difference]: Start difference. First operand 355 states and 460 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 08:34:43,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:43,109 INFO L93 Difference]: Finished difference Result 417 states and 540 transitions. [2022-11-19 08:34:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 08:34:43,110 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 08:34:43,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:43,111 INFO L225 Difference]: With dead ends: 417 [2022-11-19 08:34:43,111 INFO L226 Difference]: Without dead ends: 417 [2022-11-19 08:34:43,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:34:43,113 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 149 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:43,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 110 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:34:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-19 08:34:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 379. [2022-11-19 08:34:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 371 states have (on average 1.326145552560647) internal successors, (492), 378 states have internal predecessors, (492), 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 08:34:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 492 transitions. [2022-11-19 08:34:43,126 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 492 transitions. Word has length 37 [2022-11-19 08:34:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:43,126 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 492 transitions. [2022-11-19 08:34:43,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 08:34:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 492 transitions. [2022-11-19 08:34:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:34:43,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:43,127 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:43,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:43,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:43,340 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1138066122, now seen corresponding path program 1 times [2022-11-19 08:34:43,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:43,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836943213] [2022-11-19 08:34:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:43,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:43,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:43,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836943213] [2022-11-19 08:34:43,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836943213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:43,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:43,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:34:43,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416401501] [2022-11-19 08:34:43,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:43,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:43,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:43,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:43,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:43,445 INFO L87 Difference]: Start difference. First operand 379 states and 492 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:43,489 INFO L93 Difference]: Finished difference Result 476 states and 620 transitions. [2022-11-19 08:34:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:43,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-19 08:34:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:43,491 INFO L225 Difference]: With dead ends: 476 [2022-11-19 08:34:43,491 INFO L226 Difference]: Without dead ends: 476 [2022-11-19 08:34:43,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:34:43,492 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 40 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:43,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 88 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:34:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-19 08:34:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 377. [2022-11-19 08:34:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 370 states have (on average 1.3108108108108107) internal successors, (485), 376 states have internal predecessors, (485), 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 08:34:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 485 transitions. [2022-11-19 08:34:43,502 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 485 transitions. Word has length 38 [2022-11-19 08:34:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:43,503 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 485 transitions. [2022-11-19 08:34:43,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 485 transitions. [2022-11-19 08:34:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:34:43,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:43,504 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:43,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 08:34:43,505 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:43,505 INFO L85 PathProgramCache]: Analyzing trace with hash 920316554, now seen corresponding path program 1 times [2022-11-19 08:34:43,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:43,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765942211] [2022-11-19 08:34:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:43,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:43,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:43,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765942211] [2022-11-19 08:34:43,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765942211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:43,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:43,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:34:43,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558683410] [2022-11-19 08:34:43,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:43,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:34:43,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:43,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:34:43,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:34:43,617 INFO L87 Difference]: Start difference. First operand 377 states and 485 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 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 08:34:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:43,642 INFO L93 Difference]: Finished difference Result 376 states and 479 transitions. [2022-11-19 08:34:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:34:43,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 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 39 [2022-11-19 08:34:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:43,644 INFO L225 Difference]: With dead ends: 376 [2022-11-19 08:34:43,645 INFO L226 Difference]: Without dead ends: 376 [2022-11-19 08:34:43,646 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 08:34:43,647 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:43,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:34:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-19 08:34:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-11-19 08:34:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.2945945945945947) internal successors, (479), 375 states have internal predecessors, (479), 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 08:34:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 479 transitions. [2022-11-19 08:34:43,658 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 479 transitions. Word has length 39 [2022-11-19 08:34:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:43,658 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 479 transitions. [2022-11-19 08:34:43,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 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 08:34:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 479 transitions. [2022-11-19 08:34:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:34:43,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:43,659 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:43,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 08:34:43,660 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:43,660 INFO L85 PathProgramCache]: Analyzing trace with hash 920316555, now seen corresponding path program 1 times [2022-11-19 08:34:43,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:43,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519499319] [2022-11-19 08:34:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:43,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:43,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519499319] [2022-11-19 08:34:43,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519499319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:43,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:34:43,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:34:43,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927301878] [2022-11-19 08:34:43,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:43,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:34:43,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:43,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:34:43,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:43,810 INFO L87 Difference]: Start difference. First operand 376 states and 479 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 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 08:34:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:43,859 INFO L93 Difference]: Finished difference Result 375 states and 473 transitions. [2022-11-19 08:34:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:34:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 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 39 [2022-11-19 08:34:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:43,861 INFO L225 Difference]: With dead ends: 375 [2022-11-19 08:34:43,861 INFO L226 Difference]: Without dead ends: 375 [2022-11-19 08:34:43,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:34:43,862 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:43,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:34:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-19 08:34:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2022-11-19 08:34:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.2783783783783784) internal successors, (473), 374 states have internal predecessors, (473), 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 08:34:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 473 transitions. [2022-11-19 08:34:43,871 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 473 transitions. Word has length 39 [2022-11-19 08:34:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:43,871 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 473 transitions. [2022-11-19 08:34:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 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 08:34:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 473 transitions. [2022-11-19 08:34:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:34:43,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:43,872 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:43,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 08:34:43,872 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:43,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1092049087, now seen corresponding path program 1 times [2022-11-19 08:34:43,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:43,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360558632] [2022-11-19 08:34:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:43,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:34:43,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:43,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360558632] [2022-11-19 08:34:43,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360558632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:43,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644182430] [2022-11-19 08:34:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:43,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:43,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:43,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:44,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:34:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:44,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:34:44,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:34:44,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:34:44,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644182430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:44,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901012391] [2022-11-19 08:34:44,210 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 08:34:44,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:44,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:44,211 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:44,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:44,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:44,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:44,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:44,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:44,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:44,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:44,333 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:44,334 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:44,380 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 14 treesize of output 10 [2022-11-19 08:34:44,407 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:44,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:44,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:34:44,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:34:44,842 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:46,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11778#(and (= |ULTIMATE.start_parse_expression_list_#t~mem4#1| 0) (= (select |#valid| |ULTIMATE.start_parse_expression_list_~str#1.base|) 1) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_parse_expression_list_~i~0#1| (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (or (and (<= (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_parse_expression_list_~str#1.base|) (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset|)) 34)) (<= 0 |ULTIMATE.start_parse_expression_list_~start~0#1|)) (and (<= (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset|) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|)) (<= 1 (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset|)) (= (select (select |#memory_int| |ULTIMATE.start_parse_expression_list_~str#1.base|) (+ (- 1) |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset|)) 34))) (= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) |ULTIMATE.start_parse_expression_list_#t~short15#1| (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:46,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:46,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:46,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-11-19 08:34:46,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010179058] [2022-11-19 08:34:46,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:46,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:34:46,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:46,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:34:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:34:46,599 INFO L87 Difference]: Start difference. First operand 375 states and 473 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 08:34:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:46,745 INFO L93 Difference]: Finished difference Result 383 states and 473 transitions. [2022-11-19 08:34:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:34:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 40 [2022-11-19 08:34:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:46,747 INFO L225 Difference]: With dead ends: 383 [2022-11-19 08:34:46,747 INFO L226 Difference]: Without dead ends: 383 [2022-11-19 08:34:46,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:34:46,748 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 115 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:46,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 116 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-19 08:34:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 353. [2022-11-19 08:34:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 348 states have (on average 1.25) internal successors, (435), 352 states have internal predecessors, (435), 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 08:34:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 435 transitions. [2022-11-19 08:34:46,757 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 435 transitions. Word has length 40 [2022-11-19 08:34:46,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:46,757 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 435 transitions. [2022-11-19 08:34:46,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 08:34:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 435 transitions. [2022-11-19 08:34:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:34:46,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:46,758 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:46,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:46,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 08:34:46,964 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1012978848, now seen corresponding path program 3 times [2022-11-19 08:34:46,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:46,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992877064] [2022-11-19 08:34:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:34:47,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:47,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992877064] [2022-11-19 08:34:47,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992877064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:47,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845665881] [2022-11-19 08:34:47,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:34:47,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:47,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:47,330 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:47,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:34:47,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:34:47,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:47,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:34:47,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:47,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:47,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:34:47,507 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:34:47,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 08:34:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 08:34:47,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:48,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:34:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 08:34:48,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845665881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:48,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317656523] [2022-11-19 08:34:48,137 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:34:48,137 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:48,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:48,137 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:48,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:48,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:48,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:48,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:48,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:48,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 08:34:48,248 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-19 08:34:48,249 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 199 treesize of output 189 [2022-11-19 08:34:48,284 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 14 treesize of output 10 [2022-11-19 08:34:48,312 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:48,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:48,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:34:48,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:34:48,548 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:50,369 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12826#(and (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1) 0) (<= 1 |ULTIMATE.start_parse_expression_list_~start~0#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (<= |#NULL.base| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_parse_expression_list_#t~mem4#1|) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_parse_expression_list_#t~mem4#1| 0))' at error location [2022-11-19 08:34:50,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:50,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:50,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2022-11-19 08:34:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748668454] [2022-11-19 08:34:50,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:50,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:34:50,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:50,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:34:50,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:34:50,372 INFO L87 Difference]: Start difference. First operand 353 states and 435 transitions. Second operand has 22 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 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 08:34:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:51,109 INFO L93 Difference]: Finished difference Result 711 states and 898 transitions. [2022-11-19 08:34:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:34:51,110 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 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 45 [2022-11-19 08:34:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:51,115 INFO L225 Difference]: With dead ends: 711 [2022-11-19 08:34:51,115 INFO L226 Difference]: Without dead ends: 711 [2022-11-19 08:34:51,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 08:34:51,120 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 520 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:51,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 446 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:34:51,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-11-19 08:34:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 428. [2022-11-19 08:34:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 423 states have (on average 1.2765957446808511) internal successors, (540), 427 states have internal predecessors, (540), 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 08:34:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 540 transitions. [2022-11-19 08:34:51,137 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 540 transitions. Word has length 45 [2022-11-19 08:34:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:51,137 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 540 transitions. [2022-11-19 08:34:51,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 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 08:34:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 540 transitions. [2022-11-19 08:34:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:34:51,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:51,138 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:51,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:51,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 08:34:51,343 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:51,343 INFO L85 PathProgramCache]: Analyzing trace with hash 917851669, now seen corresponding path program 1 times [2022-11-19 08:34:51,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:51,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236113754] [2022-11-19 08:34:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:51,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:51,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:51,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236113754] [2022-11-19 08:34:51,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236113754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:51,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398538218] [2022-11-19 08:34:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:51,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:51,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:51,566 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:51,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:34:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:51,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:34:51,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:51,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:51,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-19 08:34:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:52,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398538218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:52,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1088663598] [2022-11-19 08:34:52,043 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 08:34:52,044 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:52,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:52,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:52,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:52,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:52,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:52,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:52,167 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:52,167 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:52,223 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 14 treesize of output 10 [2022-11-19 08:34:52,237 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 13 treesize of output 9 [2022-11-19 08:34:52,257 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:52,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:52,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:34:52,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:52,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:52,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2022-11-19 08:34:52,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:54,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1088663598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:54,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:34:54,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [6, 7, 7] total 32 [2022-11-19 08:34:54,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268697117] [2022-11-19 08:34:54,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:54,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:34:54,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:54,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:34:54,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2022-11-19 08:34:54,844 INFO L87 Difference]: Start difference. First operand 428 states and 540 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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 08:34:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:55,160 INFO L93 Difference]: Finished difference Result 393 states and 494 transitions. [2022-11-19 08:34:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:34:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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 46 [2022-11-19 08:34:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:55,162 INFO L225 Difference]: With dead ends: 393 [2022-11-19 08:34:55,162 INFO L226 Difference]: Without dead ends: 381 [2022-11-19 08:34:55,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2022-11-19 08:34:55,163 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:55,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 101 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:34:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-19 08:34:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2022-11-19 08:34:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 376 states have (on average 1.2819148936170213) internal successors, (482), 380 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 08:34:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 482 transitions. [2022-11-19 08:34:55,171 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 482 transitions. Word has length 46 [2022-11-19 08:34:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:55,172 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 482 transitions. [2022-11-19 08:34:55,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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 08:34:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 482 transitions. [2022-11-19 08:34:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:34:55,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:55,172 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:55,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:55,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 08:34:55,373 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2110579998, now seen corresponding path program 2 times [2022-11-19 08:34:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:55,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100322659] [2022-11-19 08:34:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 08:34:55,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:55,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100322659] [2022-11-19 08:34:55,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100322659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:55,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440420056] [2022-11-19 08:34:55,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:34:55,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:55,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:55,596 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:55,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:34:55,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:34:55,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:55,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:34:55,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 08:34:55,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:34:55,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440420056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:55,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:34:55,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2022-11-19 08:34:55,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665669820] [2022-11-19 08:34:55,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:55,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:34:55,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:55,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:34:55,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:34:55,886 INFO L87 Difference]: Start difference. First operand 381 states and 482 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:56,057 INFO L93 Difference]: Finished difference Result 381 states and 476 transitions. [2022-11-19 08:34:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:34:56,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-19 08:34:56,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:56,059 INFO L225 Difference]: With dead ends: 381 [2022-11-19 08:34:56,059 INFO L226 Difference]: Without dead ends: 381 [2022-11-19 08:34:56,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:34:56,060 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 131 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:56,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 44 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:34:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-19 08:34:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 360. [2022-11-19 08:34:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 358 states have (on average 1.2541899441340782) internal successors, (449), 359 states have internal predecessors, (449), 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 08:34:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 449 transitions. [2022-11-19 08:34:56,067 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 449 transitions. Word has length 46 [2022-11-19 08:34:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:56,067 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 449 transitions. [2022-11-19 08:34:56,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 449 transitions. [2022-11-19 08:34:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 08:34:56,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:56,068 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:56,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:56,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 08:34:56,274 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:34:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1049038286, now seen corresponding path program 1 times [2022-11-19 08:34:56,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:56,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498463968] [2022-11-19 08:34:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:56,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:56,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498463968] [2022-11-19 08:34:56,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498463968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:34:56,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534130127] [2022-11-19 08:34:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:56,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:56,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:56,495 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:56,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:34:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:34:56,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:34:56,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:56,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:56,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-19 08:34:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:34:56,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534130127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:56,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2120323680] [2022-11-19 08:34:56,996 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 08:34:56,996 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:56,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:56,999 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:56,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:57,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:34:57,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:34:57,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:57,121 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:34:57,121 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:34:57,171 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 14 treesize of output 10 [2022-11-19 08:34:57,198 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:34:57,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:34:57,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:34:57,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:34:57,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:57,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2022-11-19 08:34:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,775 INFO L321 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2022-11-19 08:34:57,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 182 [2022-11-19 08:34:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:58,021 INFO L321 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2022-11-19 08:34:58,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 87 [2022-11-19 08:34:58,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:58,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:58,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:58,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:58,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:58,452 INFO L321 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2022-11-19 08:34:58,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 87 [2022-11-19 08:34:58,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:02,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16303#(and (= |ULTIMATE.start_parse_expression_list_#t~mem4#1| 0) (= (select |#valid| |ULTIMATE.start_parse_expression_list_~str#1.base|) 1) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= (+ |ULTIMATE.start_parse_expression_list_~i~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|)) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) |ULTIMATE.start_parse_expression_list_#t~switch5#1| (<= 8 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_parse_expression_list_~str#1.base|) (+ |ULTIMATE.start_parse_expression_list_~i~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset|)) |ULTIMATE.start_parse_expression_list_#t~mem4#1|) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~i~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset|)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:35:02,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:35:02,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:35:02,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 20 [2022-11-19 08:35:02,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620537643] [2022-11-19 08:35:02,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:02,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:35:02,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:35:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 08:35:02,918 INFO L87 Difference]: Start difference. First operand 360 states and 449 transitions. Second operand has 21 states, 20 states have (on average 5.5) internal successors, (110), 21 states have internal predecessors, (110), 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 08:35:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:03,414 INFO L93 Difference]: Finished difference Result 526 states and 650 transitions. [2022-11-19 08:35:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:35:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.5) internal successors, (110), 21 states have internal predecessors, (110), 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 52 [2022-11-19 08:35:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:03,416 INFO L225 Difference]: With dead ends: 526 [2022-11-19 08:35:03,416 INFO L226 Difference]: Without dead ends: 526 [2022-11-19 08:35:03,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:35:03,418 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 408 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:03,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 372 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:35:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-19 08:35:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 323. [2022-11-19 08:35:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 321 states have (on average 1.2616822429906542) internal successors, (405), 322 states have internal predecessors, (405), 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 08:35:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 405 transitions. [2022-11-19 08:35:03,425 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 405 transitions. Word has length 52 [2022-11-19 08:35:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:03,425 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 405 transitions. [2022-11-19 08:35:03,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.5) internal successors, (110), 21 states have internal predecessors, (110), 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 08:35:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 405 transitions. [2022-11-19 08:35:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 08:35:03,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:03,427 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-19 08:35:03,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-19 08:35:03,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 08:35:03,632 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:35:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash -500680237, now seen corresponding path program 3 times [2022-11-19 08:35:03,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:03,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621297520] [2022-11-19 08:35:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:03,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:35:04,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621297520] [2022-11-19 08:35:04,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621297520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394561258] [2022-11-19 08:35:04,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:35:04,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:04,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:04,005 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:04,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:35:04,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:35:04,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:04,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:35:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:04,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:04,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:35:04,216 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:35:04,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 08:35:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:35:04,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:04,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 08:35:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:35:05,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394561258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:05,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [564309402] [2022-11-19 08:35:05,016 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 08:35:05,016 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:05,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:05,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:05,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:05,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:05,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:05,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:35:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:05,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 08:35:05,121 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-19 08:35:05,122 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 199 treesize of output 189 [2022-11-19 08:35:05,155 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 14 treesize of output 10 [2022-11-19 08:35:05,178 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:35:05,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:35:05,187 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 13 treesize of output 9 [2022-11-19 08:35:05,209 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:35:05,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:35:05,331 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:06,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17536#(and (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1) 0) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (= |ULTIMATE.start_parse_expression_list_~start~0#1| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~i~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:35:06,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:35:06,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:35:06,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-11-19 08:35:06,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004200418] [2022-11-19 08:35:06,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:06,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 08:35:06,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:06,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 08:35:06,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 08:35:06,726 INFO L87 Difference]: Start difference. First operand 323 states and 405 transitions. Second operand has 29 states, 28 states have (on average 4.214285714285714) internal successors, (118), 29 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:07,700 INFO L93 Difference]: Finished difference Result 697 states and 881 transitions. [2022-11-19 08:35:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:35:07,701 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.214285714285714) internal successors, (118), 29 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-19 08:35:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:07,703 INFO L225 Difference]: With dead ends: 697 [2022-11-19 08:35:07,703 INFO L226 Difference]: Without dead ends: 697 [2022-11-19 08:35:07,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=375, Invalid=2075, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 08:35:07,705 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1901 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:07,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1901 Valid, 1225 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:35:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-11-19 08:35:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 691. [2022-11-19 08:35:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 689 states have (on average 1.2786647314949202) internal successors, (881), 690 states have internal predecessors, (881), 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 08:35:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 881 transitions. [2022-11-19 08:35:07,718 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 881 transitions. Word has length 52 [2022-11-19 08:35:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:07,719 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 881 transitions. [2022-11-19 08:35:07,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.214285714285714) internal successors, (118), 29 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 881 transitions. [2022-11-19 08:35:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 08:35:07,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:07,720 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:07,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 08:35:07,926 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:35:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1713252190, now seen corresponding path program 1 times [2022-11-19 08:35:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:07,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223787192] [2022-11-19 08:35:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:35:08,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:08,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223787192] [2022-11-19 08:35:08,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223787192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:08,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402310968] [2022-11-19 08:35:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:08,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:08,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:08,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:08,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:35:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:35:08,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:35:08,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:08,684 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 08:35:08,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-11-19 08:35:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:35:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402310968] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:08,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:35:08,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 10] total 21 [2022-11-19 08:35:08,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614633831] [2022-11-19 08:35:08,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:08,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:35:08,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:08,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:35:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:35:08,736 INFO L87 Difference]: Start difference. First operand 691 states and 881 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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 08:35:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:08,937 INFO L93 Difference]: Finished difference Result 770 states and 986 transitions. [2022-11-19 08:35:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:35:08,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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 55 [2022-11-19 08:35:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:08,940 INFO L225 Difference]: With dead ends: 770 [2022-11-19 08:35:08,940 INFO L226 Difference]: Without dead ends: 770 [2022-11-19 08:35:08,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:35:08,941 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:08,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 147 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:35:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-11-19 08:35:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 693. [2022-11-19 08:35:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 691 states have (on average 1.2778581765557164) internal successors, (883), 692 states have internal predecessors, (883), 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 08:35:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 883 transitions. [2022-11-19 08:35:08,956 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 883 transitions. Word has length 55 [2022-11-19 08:35:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:08,956 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 883 transitions. [2022-11-19 08:35:08,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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 08:35:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 883 transitions. [2022-11-19 08:35:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 08:35:08,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:08,957 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:08,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:09,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:09,168 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:35:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1571035855, now seen corresponding path program 1 times [2022-11-19 08:35:09,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:09,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262935099] [2022-11-19 08:35:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:09,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:35:09,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:09,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262935099] [2022-11-19 08:35:09,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262935099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:09,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173196229] [2022-11-19 08:35:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:09,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:09,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:09,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:09,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 08:35:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:09,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 08:35:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:35:09,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:10,036 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 08:35:10,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-11-19 08:35:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:35:10,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173196229] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:10,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:35:10,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 10] total 22 [2022-11-19 08:35:10,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206640631] [2022-11-19 08:35:10,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:10,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:35:10,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:10,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:35:10,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:35:10,083 INFO L87 Difference]: Start difference. First operand 693 states and 883 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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 08:35:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:10,260 INFO L93 Difference]: Finished difference Result 727 states and 916 transitions. [2022-11-19 08:35:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:35:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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 56 [2022-11-19 08:35:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:10,263 INFO L225 Difference]: With dead ends: 727 [2022-11-19 08:35:10,263 INFO L226 Difference]: Without dead ends: 727 [2022-11-19 08:35:10,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:35:10,264 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:10,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 137 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:35:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-11-19 08:35:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 719. [2022-11-19 08:35:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 717 states have (on average 1.2677824267782427) internal successors, (909), 718 states have internal predecessors, (909), 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 08:35:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 909 transitions. [2022-11-19 08:35:10,277 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 909 transitions. Word has length 56 [2022-11-19 08:35:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:10,277 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 909 transitions. [2022-11-19 08:35:10,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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 08:35:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 909 transitions. [2022-11-19 08:35:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 08:35:10,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:10,279 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:10,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:10,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-19 08:35:10,483 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:35:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:10,483 INFO L85 PathProgramCache]: Analyzing trace with hash 206289012, now seen corresponding path program 4 times [2022-11-19 08:35:10,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:10,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535935183] [2022-11-19 08:35:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:10,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 15 proven. 92 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:35:10,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:10,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535935183] [2022-11-19 08:35:10,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535935183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:10,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171928281] [2022-11-19 08:35:10,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:35:10,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:10,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:10,943 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:10,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:35:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:11,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:35:11,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-19 08:35:11,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:11,483 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 08:35:11,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-11-19 08:35:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-19 08:35:11,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171928281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:11,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355034889] [2022-11-19 08:35:11,613 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:35:11,613 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:11,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:11,614 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:11,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:11,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:11,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:35:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:11,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 08:35:11,713 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-19 08:35:11,713 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 199 treesize of output 189 [2022-11-19 08:35:11,755 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 14 treesize of output 10 [2022-11-19 08:35:11,794 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:35:11,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 08:35:11,820 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:35:11,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:35:11,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:35:12,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:14,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22959#(and (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1) 0) (<= 1 |ULTIMATE.start_parse_expression_list_~start~0#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (<= |#NULL.base| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_parse_expression_list_#t~mem4#1|) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_parse_expression_list_#t~mem4#1| 0))' at error location [2022-11-19 08:35:14,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:35:14,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:35:14,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-11-19 08:35:14,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447802340] [2022-11-19 08:35:14,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:14,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 08:35:14,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 08:35:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:35:14,215 INFO L87 Difference]: Start difference. First operand 719 states and 909 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 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 08:35:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:18,462 INFO L93 Difference]: Finished difference Result 1200 states and 1510 transitions. [2022-11-19 08:35:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-19 08:35:18,463 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 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 60 [2022-11-19 08:35:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:18,466 INFO L225 Difference]: With dead ends: 1200 [2022-11-19 08:35:18,467 INFO L226 Difference]: Without dead ends: 1200 [2022-11-19 08:35:18,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3817 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=872, Invalid=13170, Unknown=0, NotChecked=0, Total=14042 [2022-11-19 08:35:18,475 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 696 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 2848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:18,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 2013 Invalid, 2848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:35:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-11-19 08:35:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 886. [2022-11-19 08:35:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 884 states have (on average 1.2692307692307692) internal successors, (1122), 885 states have internal predecessors, (1122), 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 08:35:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1122 transitions. [2022-11-19 08:35:18,499 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1122 transitions. Word has length 60 [2022-11-19 08:35:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:18,499 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1122 transitions. [2022-11-19 08:35:18,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 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 08:35:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1122 transitions. [2022-11-19 08:35:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 08:35:18,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:18,516 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:18,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:18,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:18,716 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:35:18,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash 700695332, now seen corresponding path program 2 times [2022-11-19 08:35:18,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:18,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812510663] [2022-11-19 08:35:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:18,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 08:35:19,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:19,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812510663] [2022-11-19 08:35:19,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812510663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:19,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280792437] [2022-11-19 08:35:19,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:35:19,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:19,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:19,102 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:19,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 08:35:19,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:35:19,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:19,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 08:35:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:35:19,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:19,649 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 08:35:19,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-11-19 08:35:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:35:19,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280792437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:19,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401433316] [2022-11-19 08:35:19,728 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 08:35:19,728 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:19,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:19,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:19,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:19,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:19,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:35:19,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:19,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 08:35:19,854 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-19 08:35:19,854 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 199 treesize of output 189 [2022-11-19 08:35:19,889 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 14 treesize of output 10 [2022-11-19 08:35:19,914 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:35:19,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:35:19,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:35:19,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:35:20,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:20,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:20,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 67 [2022-11-19 08:35:20,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:20,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:20,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 67 [2022-11-19 08:35:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:20,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 84 [2022-11-19 08:35:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:21,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:21,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 84 [2022-11-19 08:35:21,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:25,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25619#(and (<= 1 |ULTIMATE.start_parse_expression_list_~start~0#1|) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_#t~mem4#1|) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (<= |ULTIMATE.start_parse_expression_list_#t~mem4#1| 0))' at error location [2022-11-19 08:35:25,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:35:25,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:35:25,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 26 [2022-11-19 08:35:25,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872542056] [2022-11-19 08:35:25,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:25,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:35:25,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:35:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 08:35:25,928 INFO L87 Difference]: Start difference. First operand 886 states and 1122 transitions. Second operand has 26 states, 26 states have (on average 5.538461538461538) internal successors, (144), 26 states have internal predecessors, (144), 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 08:35:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:28,538 INFO L93 Difference]: Finished difference Result 1223 states and 1520 transitions. [2022-11-19 08:35:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-19 08:35:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.538461538461538) internal successors, (144), 26 states have internal predecessors, (144), 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 65 [2022-11-19 08:35:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:28,544 INFO L225 Difference]: With dead ends: 1223 [2022-11-19 08:35:28,544 INFO L226 Difference]: Without dead ends: 1223 [2022-11-19 08:35:28,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 165 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2806 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1004, Invalid=8502, Unknown=0, NotChecked=0, Total=9506 [2022-11-19 08:35:28,550 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 576 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:28,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1029 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:35:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-11-19 08:35:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 895. [2022-11-19 08:35:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 893 states have (on average 1.2676371780515117) internal successors, (1132), 894 states have internal predecessors, (1132), 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 08:35:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1132 transitions. [2022-11-19 08:35:28,569 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1132 transitions. Word has length 65 [2022-11-19 08:35:28,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:28,569 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1132 transitions. [2022-11-19 08:35:28,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.538461538461538) internal successors, (144), 26 states have internal predecessors, (144), 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 08:35:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1132 transitions. [2022-11-19 08:35:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:35:28,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:28,571 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:28,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:28,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-19 08:35:28,777 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:35:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:28,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1930507101, now seen corresponding path program 5 times [2022-11-19 08:35:28,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:28,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095539609] [2022-11-19 08:35:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:28,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 63 proven. 89 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 08:35:29,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:29,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095539609] [2022-11-19 08:35:29,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095539609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:29,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141967306] [2022-11-19 08:35:29,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:35:29,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:29,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:29,711 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:29,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 08:35:29,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:35:29,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:35:29,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:29,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-19 08:35:29,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-19 08:35:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:29,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:35:29,991 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:35:29,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 08:35:29,994 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 11 treesize of output 7 [2022-11-19 08:35:30,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:35:30,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-19 08:35:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-11-19 08:35:30,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:31,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-19 08:35:31,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:35:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-11-19 08:35:32,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141967306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467727982] [2022-11-19 08:35:32,084 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 08:35:32,084 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:32,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:32,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:32,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:32,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:32,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:32,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:35:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:32,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-19 08:35:32,191 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-19 08:35:32,192 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 199 treesize of output 189 [2022-11-19 08:35:32,226 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 14 treesize of output 10 [2022-11-19 08:35:32,239 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 13 treesize of output 9 [2022-11-19 08:35:32,258 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:35:32,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:35:32,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:35:32,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:34,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28316#(and (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1) 0) (<= 1 |ULTIMATE.start_parse_expression_list_~start~0#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~start~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (<= |#NULL.base| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_parse_expression_list_#t~mem4#1|) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_parse_expression_list_#t~mem4#1| 0))' at error location [2022-11-19 08:35:34,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:35:34,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:35:34,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 29 [2022-11-19 08:35:34,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373136498] [2022-11-19 08:35:34,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:34,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 08:35:34,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:34,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 08:35:34,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:35:34,725 INFO L87 Difference]: Start difference. First operand 895 states and 1132 transitions. Second operand has 30 states, 30 states have (on average 3.0) internal successors, (90), 29 states have internal predecessors, (90), 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 08:35:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:37,315 INFO L93 Difference]: Finished difference Result 1168 states and 1450 transitions. [2022-11-19 08:35:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 08:35:37,317 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.0) internal successors, (90), 29 states have internal predecessors, (90), 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 69 [2022-11-19 08:35:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:37,320 INFO L225 Difference]: With dead ends: 1168 [2022-11-19 08:35:37,320 INFO L226 Difference]: Without dead ends: 1168 [2022-11-19 08:35:37,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=793, Invalid=5687, Unknown=0, NotChecked=0, Total=6480 [2022-11-19 08:35:37,321 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 853 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:37,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 880 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1288 Invalid, 0 Unknown, 11 Unchecked, 0.7s Time] [2022-11-19 08:35:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2022-11-19 08:35:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 536. [2022-11-19 08:35:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.2149532710280373) internal successors, (650), 535 states have internal predecessors, (650), 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 08:35:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 650 transitions. [2022-11-19 08:35:37,335 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 650 transitions. Word has length 69 [2022-11-19 08:35:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:37,336 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 650 transitions. [2022-11-19 08:35:37,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.0) internal successors, (90), 29 states have internal predecessors, (90), 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 08:35:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 650 transitions. [2022-11-19 08:35:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 08:35:37,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:37,337 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2022-11-19 08:35:37,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-19 08:35:37,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:37,543 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2022-11-19 08:35:37,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash 226166983, now seen corresponding path program 4 times [2022-11-19 08:35:37,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:37,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007911102] [2022-11-19 08:35:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:37,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 18 proven. 216 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:35:38,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:38,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007911102] [2022-11-19 08:35:38,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007911102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:35:38,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218467671] [2022-11-19 08:35:38,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:35:38,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:38,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:38,123 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:38,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 08:35:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:38,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-19 08:35:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:38,317 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 11 treesize of output 7 [2022-11-19 08:35:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 42 proven. 192 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:35:38,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 42 proven. 192 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-19 08:35:39,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218467671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:39,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1347024222] [2022-11-19 08:35:39,298 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 08:35:39,298 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:39,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:39,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:39,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:39,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:35:39,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:35:39,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:39,418 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-19 08:35:39,418 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 5 case distinctions, treesize of input 195 treesize of output 192 [2022-11-19 08:35:39,470 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 14 treesize of output 10 [2022-11-19 08:35:39,498 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:35:39,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:35:39,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:35:39,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 08:35:39,623 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:41,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30595#(and (<= (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1) 0) (<= |ULTIMATE.start_parse_expression_list_~str#1.offset| 0) (= |ULTIMATE.start_parse_expression_list_~start~0#1| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~#str2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (not (<= (+ |ULTIMATE.start_parse_expression_list_~i~0#1| |ULTIMATE.start_parse_expression_list_~str#1.offset| 1) (select |#length| |ULTIMATE.start_parse_expression_list_~str#1.base|))) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.offset|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.base|) (<= 0 |ULTIMATE.start_parse_expression_list_#in~str#1.offset|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_parse_expression_list_~j~0#1| 1)) (<= 0 |ULTIMATE.start_parse_expression_list_~str#1.base|) (= |ULTIMATE.start_parse_expression_list_~#str2~0#1.offset| 0) (<= 8 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_parse_expression_list_#in~str#1.offset| 0) (<= 0 |ULTIMATE.start_parse_expression_list_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:35:41,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:35:41,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:35:41,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 36 [2022-11-19 08:35:41,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479537302] [2022-11-19 08:35:41,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:41,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 08:35:41,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:41,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 08:35:41,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:35:41,028 INFO L87 Difference]: Start difference. First operand 536 states and 650 transitions. Second operand has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 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 08:35:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:42,392 INFO L93 Difference]: Finished difference Result 518 states and 624 transitions. [2022-11-19 08:35:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:35:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 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 76 [2022-11-19 08:35:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:42,393 INFO L225 Difference]: With dead ends: 518 [2022-11-19 08:35:42,393 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 08:35:42,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=308, Invalid=3982, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 08:35:42,394 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 945 mSDsluCounter, 2743 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 2921 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:42,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 2921 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:35:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 08:35:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 08:35:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 08:35:42,395 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 76 [2022-11-19 08:35:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:42,395 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 08:35:42,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 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 08:35:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 08:35:42,396 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 08:35:42,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 24 remaining) [2022-11-19 08:35:42,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2022-11-19 08:35:42,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2022-11-19 08:35:42,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2022-11-19 08:35:42,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2022-11-19 08:35:42,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 24 remaining) [2022-11-19 08:35:42,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2022-11-19 08:35:42,399 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 24 remaining) [2022-11-19 08:35:42,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2022-11-19 08:35:42,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2022-11-19 08:35:42,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2022-11-19 08:35:42,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 24 remaining) [2022-11-19 08:35:42,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 24 remaining) [2022-11-19 08:35:42,400 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 24 remaining) [2022-11-19 08:35:42,401 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2022-11-19 08:35:42,401 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2022-11-19 08:35:42,401 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 24 remaining) [2022-11-19 08:35:42,401 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 24 remaining) [2022-11-19 08:35:42,401 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (5 of 24 remaining) [2022-11-19 08:35:42,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2022-11-19 08:35:42,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2022-11-19 08:35:42,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 24 remaining) [2022-11-19 08:35:42,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 24 remaining) [2022-11-19 08:35:42,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (0 of 24 remaining) [2022-11-19 08:35:42,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:42,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-19 08:35:42,611 INFO L444 BasicCegarLoop]: Path program histogram: [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:42,612 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:35:42,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:35:42 BoogieIcfgContainer [2022-11-19 08:35:42,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:35:42,616 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:35:42,616 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:35:42,616 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:35:42,617 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:34:13" (3/4) ... [2022-11-19 08:35:42,619 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 08:35:42,628 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges [2022-11-19 08:35:42,628 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2022-11-19 08:35:42,628 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-19 08:35:42,629 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 08:35:42,678 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:35:42,678 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:35:42,678 INFO L158 Benchmark]: Toolchain (without parser) took 90448.96ms. Allocated memory was 113.2MB in the beginning and 362.8MB in the end (delta: 249.6MB). Free memory was 80.8MB in the beginning and 276.8MB in the end (delta: -195.9MB). Peak memory consumption was 54.2MB. Max. memory is 16.1GB. [2022-11-19 08:35:42,679 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory is still 33.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:35:42,679 INFO L158 Benchmark]: CACSL2BoogieTranslator took 313.50ms. Allocated memory is still 113.2MB. Free memory was 80.8MB in the beginning and 86.2MB in the end (delta: -5.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 08:35:42,679 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.52ms. Allocated memory is still 113.2MB. Free memory was 86.2MB in the beginning and 84.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:35:42,679 INFO L158 Benchmark]: Boogie Preprocessor took 43.17ms. Allocated memory is still 113.2MB. Free memory was 84.4MB in the beginning and 82.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:35:42,681 INFO L158 Benchmark]: RCFGBuilder took 759.54ms. Allocated memory is still 113.2MB. Free memory was 82.9MB in the beginning and 60.5MB in the end (delta: 22.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-19 08:35:42,682 INFO L158 Benchmark]: TraceAbstraction took 89203.22ms. Allocated memory was 113.2MB in the beginning and 362.8MB in the end (delta: 249.6MB). Free memory was 59.8MB in the beginning and 280.4MB in the end (delta: -220.6MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. [2022-11-19 08:35:42,682 INFO L158 Benchmark]: Witness Printer took 62.24ms. Allocated memory is still 362.8MB. Free memory was 280.4MB in the beginning and 276.8MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 08:35:42,683 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory is still 33.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 313.50ms. Allocated memory is still 113.2MB. Free memory was 80.8MB in the beginning and 86.2MB in the end (delta: -5.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.52ms. Allocated memory is still 113.2MB. Free memory was 86.2MB in the beginning and 84.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.17ms. Allocated memory is still 113.2MB. Free memory was 84.4MB in the beginning and 82.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 759.54ms. Allocated memory is still 113.2MB. Free memory was 82.9MB in the beginning and 60.5MB in the end (delta: 22.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 89203.22ms. Allocated memory was 113.2MB in the beginning and 362.8MB in the end (delta: 249.6MB). Free memory was 59.8MB in the beginning and 280.4MB in the end (delta: -220.6MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. * Witness Printer took 62.24ms. Allocated memory is still 362.8MB. Free memory was 280.4MB in the beginning and 276.8MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 87]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 61 locations, 24 error locations. Started 1 CEGAR loops. OverallTime: 89.1s, OverallIterations: 35, TraceHistogramMax: 10, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 20.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9150 SdHoareTripleChecker+Valid, 9.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9150 mSDsluCounter, 13204 SdHoareTripleChecker+Invalid, 8.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 63 IncrementalHoareTripleChecker+Unchecked, 11555 mSDsCounter, 390 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13408 IncrementalHoareTripleChecker+Invalid, 13861 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 390 mSolverCounterUnsat, 1649 mSDtfsCounter, 13408 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2952 GetRequests, 1981 SyntacticMatches, 42 SemanticMatches, 929 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15394 ImplicationChecksByTransitivity, 48.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=895occurred in iteration=33, InterpolantAutomatonStates: 497, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 35 MinimizatonAttempts, 2668 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 16.5s InterpolantComputationTime, 2103 NumberOfCodeBlocks, 1968 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 2868 ConstructedInterpolants, 83 QuantifiedInterpolants, 22256 SizeOfPredicates, 125 NumberOfNonLiveVariables, 4396 ConjunctsInSsa, 354 ConjunctsInUnsatCore, 78 InterpolantComputations, 16 PerfectInterpolantSequences, 4536/6022 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 63, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 156, TOOLS_POST_TIME: 1.8s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 149, TOOLS_QUANTIFIERELIM_TIME: 1.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 286, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 12, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 21, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 63, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 9, LOOP_SUMMARIZER_CACHE_MISSES: 9, LOOP_SUMMARIZER_OVERALL_TIME: 1.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 21, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 1177, DAG_COMPRESSION_RETAINED_NODES: 251, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 24 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-19 08:35:42,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_480e1ad3-bf48-49eb-a931-79fe36d7b95d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE