./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a 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_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI --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 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:21:36,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:21:36,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:21:36,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:21:36,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:21:36,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:21:36,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:21:36,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:21:36,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:21:36,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:21:36,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:21:36,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:21:36,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:21:36,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:21:36,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:21:36,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:21:36,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:21:36,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:21:36,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:21:36,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:21:36,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:21:36,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:21:36,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:21:36,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:21:36,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:21:36,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:21:36,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:21:36,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:21:36,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:21:36,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:21:36,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:21:36,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:21:36,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:21:36,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:21:36,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:21:36,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:21:36,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:21:36,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:21:36,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:21:36,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:21:36,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:21:36,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 02:21:36,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:21:36,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:21:36,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:21:36,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:21:36,336 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:21:36,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:21:36,337 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:21:36,337 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:21:36,337 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:21:36,338 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:21:36,342 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:21:36,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:21:36,343 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:21:36,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:21:36,343 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:21:36,343 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:21:36,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:21:36,344 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:21:36,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:21:36,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:21:36,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:21:36,345 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:21:36,345 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:21:36,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:21:36,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:21:36,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:21:36,346 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:21:36,346 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:21:36,346 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:21:36,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:21:36,346 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:21:36,347 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:21:36,347 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:21:36,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:21:36,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:21:36,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:21:36,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:21:36,348 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:21:36,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:21:36,348 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:21:36,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:21:36,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:21:36,349 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_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2022-11-03 02:21:36,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:21:36,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:21:36,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:21:36,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:21:36,712 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:21:36,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2022-11-03 02:21:36,792 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/data/b6f53e748/81f787fd90474a898fea30403bf541f2/FLAGd9154997e [2022-11-03 02:21:37,293 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:21:37,294 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2022-11-03 02:21:37,302 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/data/b6f53e748/81f787fd90474a898fea30403bf541f2/FLAGd9154997e [2022-11-03 02:21:37,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/data/b6f53e748/81f787fd90474a898fea30403bf541f2 [2022-11-03 02:21:37,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:21:37,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:21:37,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:21:37,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:21:37,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:21:37,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:37,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59bd430a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37, skipping insertion in model container [2022-11-03 02:21:37,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:37,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:21:37,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:21:37,897 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2022-11-03 02:21:37,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:21:37,919 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:21:37,935 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2022-11-03 02:21:37,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:21:37,971 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:21:37,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37 WrapperNode [2022-11-03 02:21:37,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:21:37,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:21:37,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:21:37,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:21:37,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,023 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-03 02:21:38,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:21:38,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:21:38,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:21:38,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:21:38,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,048 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:21:38,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:21:38,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:21:38,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:21:38,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (1/1) ... [2022-11-03 02:21:38,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:21:38,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:38,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:21:38,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:21:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:21:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:21:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:21:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:21:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:21:38,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:21:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:21:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:21:38,236 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:21:38,238 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:21:38,536 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:21:38,579 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:21:38,594 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:21:38,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:21:38 BoogieIcfgContainer [2022-11-03 02:21:38,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:21:38,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:21:38,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:21:38,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:21:38,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:21:37" (1/3) ... [2022-11-03 02:21:38,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e195aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:21:38, skipping insertion in model container [2022-11-03 02:21:38,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:37" (2/3) ... [2022-11-03 02:21:38,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e195aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:21:38, skipping insertion in model container [2022-11-03 02:21:38,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:21:38" (3/3) ... [2022-11-03 02:21:38,617 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2022-11-03 02:21:38,637 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:21:38,637 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-03 02:21:38,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:21:38,690 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;@799c144c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:21:38,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-11-03 02:21:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 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) [2022-11-03 02:21:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:21:38,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:38,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:21:38,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash 114230, now seen corresponding path program 1 times [2022-11-03 02:21:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:38,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975539013] [2022-11-03 02:21:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:38,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:39,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:39,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975539013] [2022-11-03 02:21:39,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975539013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:39,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:39,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:21:39,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222006886] [2022-11-03 02:21:39,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:39,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:39,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:39,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:39,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:39,058 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 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) 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) [2022-11-03 02:21:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:39,202 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2022-11-03 02:21:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:39,205 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 [2022-11-03 02:21:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:39,213 INFO L225 Difference]: With dead ends: 67 [2022-11-03 02:21:39,213 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 02:21:39,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:39,219 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:39,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 02:21:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2022-11-03 02:21:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 2.0) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-11-03 02:21:39,251 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 3 [2022-11-03 02:21:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:39,251 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-11-03 02:21:39,251 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) [2022-11-03 02:21:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-11-03 02:21:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:21:39,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:39,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:21:39,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:21:39,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash 111798, now seen corresponding path program 1 times [2022-11-03 02:21:39,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:39,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003772196] [2022-11-03 02:21:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:39,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:39,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:39,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003772196] [2022-11-03 02:21:39,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003772196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:39,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:39,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:21:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713361656] [2022-11-03 02:21:39,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:39,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:39,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:39,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:39,356 INFO L87 Difference]: Start difference. First operand 34 states and 36 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) [2022-11-03 02:21:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:39,393 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-03 02:21:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:39,393 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 [2022-11-03 02:21:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:39,394 INFO L225 Difference]: With dead ends: 29 [2022-11-03 02:21:39,394 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 02:21:39,394 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 [2022-11-03 02:21:39,396 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:39,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:21:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 02:21:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-03 02:21:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-03 02:21:39,401 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 3 [2022-11-03 02:21:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:39,402 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-03 02:21:39,402 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) [2022-11-03 02:21:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-03 02:21:39,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:21:39,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:39,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:21:39,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:21:39,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash 111799, now seen corresponding path program 1 times [2022-11-03 02:21:39,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:39,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220001863] [2022-11-03 02:21:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:39,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:39,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:39,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220001863] [2022-11-03 02:21:39,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220001863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:39,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:39,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:21:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113227086] [2022-11-03 02:21:39,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:39,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:39,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:39,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:39,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:21:39,543 INFO L87 Difference]: Start difference. First operand 29 states and 31 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) [2022-11-03 02:21:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:39,594 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-03 02:21:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:39,596 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 [2022-11-03 02:21:39,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:39,597 INFO L225 Difference]: With dead ends: 30 [2022-11-03 02:21:39,598 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 02:21:39,599 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 [2022-11-03 02:21:39,606 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:39,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:21:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 02:21:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-03 02:21:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-11-03 02:21:39,611 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2022-11-03 02:21:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:39,611 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-11-03 02:21:39,611 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) [2022-11-03 02:21:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-11-03 02:21:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:21:39,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:39,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:21:39,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:21:39,613 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash 107509825, now seen corresponding path program 1 times [2022-11-03 02:21:39,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:39,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403100992] [2022-11-03 02:21:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:39,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:39,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:39,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403100992] [2022-11-03 02:21:39,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403100992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:39,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218150295] [2022-11-03 02:21:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:39,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:39,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:39,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:21:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:21:39,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:39,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:39,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218150295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:39,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1871049449] [2022-11-03 02:21:39,944 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-03 02:21:39,944 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:39,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:39,954 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:39,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:40,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:21:40,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:21:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:40,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:40,416 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:21:40,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-03 02:21:40,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:40,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:40,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:41,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1871049449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:41,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:41,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2022-11-03 02:21:41,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517469511] [2022-11-03 02:21:41,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:41,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:21:41,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:21:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:21:41,169 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:41,461 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-11-03 02:21:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:21:41,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 [2022-11-03 02:21:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:41,463 INFO L225 Difference]: With dead ends: 31 [2022-11-03 02:21:41,463 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 02:21:41,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:21:41,464 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:41,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 44 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 02:21:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 02:21:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-03 02:21:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.65) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-11-03 02:21:41,469 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 5 [2022-11-03 02:21:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:41,469 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-11-03 02:21:41,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:41,470 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-11-03 02:21:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:21:41,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:41,470 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-03 02:21:41,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:41,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:41,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash 107507393, now seen corresponding path program 1 times [2022-11-03 02:21:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218705579] [2022-11-03 02:21:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:41,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:41,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218705579] [2022-11-03 02:21:41,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218705579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:41,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942244788] [2022-11-03 02:21:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:41,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:41,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:41,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:41,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:21:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:41,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:21:41,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:41,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 02:21:41,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-11-03 02:21:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:41,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:42,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942244788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:42,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227573062] [2022-11-03 02:21:42,025 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-03 02:21:42,025 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:42,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:42,026 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:42,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:42,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:42,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:42,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:42,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:21:42,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:42,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:21:42,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:42,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:42,205 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:21:42,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-03 02:21:42,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:42,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:42,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:42,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (<= |ULTIMATE.start_main_#t~nondet2#1| 2147483647) (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet2#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:21:42,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:42,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:42,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-03 02:21:42,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447026781] [2022-11-03 02:21:42,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:42,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:21:42,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:42,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:21:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:21:42,764 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:42,898 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-11-03 02:21:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:21:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 [2022-11-03 02:21:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:42,899 INFO L225 Difference]: With dead ends: 35 [2022-11-03 02:21:42,899 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 02:21:42,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:21:42,900 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:42,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 47 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 02:21:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-03 02:21:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5) internal successors, (39), 34 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) [2022-11-03 02:21:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-03 02:21:42,905 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 5 [2022-11-03 02:21:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:42,905 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-03 02:21:42,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-03 02:21:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:21:42,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:42,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:42,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:43,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:43,106 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:43,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:43,107 INFO L85 PathProgramCache]: Analyzing trace with hash 923771867, now seen corresponding path program 1 times [2022-11-03 02:21:43,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:43,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630429669] [2022-11-03 02:21:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:43,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:43,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:43,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630429669] [2022-11-03 02:21:43,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630429669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695443982] [2022-11-03 02:21:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:43,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:43,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:43,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:21:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:43,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:21:43,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:43,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:43,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695443982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:43,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1434362270] [2022-11-03 02:21:43,280 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:21:43,280 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:43,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:43,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:43,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:43,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:43,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:43,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:43,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:43,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:43,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:21:43,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:43,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:21:43,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:43,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:43,466 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:21:43,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-03 02:21:43,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:43,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:43,743 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:44,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '533#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_71| Int)) (and (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_71| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_71| 4))))) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_71|) (<= 4 (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_71| 4))) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_71| 4))) 2147483647))) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:21:44,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:44,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:44,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-03 02:21:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622502949] [2022-11-03 02:21:44,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:44,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:21:44,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:21:44,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:21:44,379 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:44,595 INFO L93 Difference]: Finished difference Result 169 states and 177 transitions. [2022-11-03 02:21:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:21:44,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:21:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:44,603 INFO L225 Difference]: With dead ends: 169 [2022-11-03 02:21:44,603 INFO L226 Difference]: Without dead ends: 169 [2022-11-03 02:21:44,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:21:44,606 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:44,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 78 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:21:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-03 02:21:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 38. [2022-11-03 02:21:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-11-03 02:21:44,617 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 10 [2022-11-03 02:21:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:44,617 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-11-03 02:21:44,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-11-03 02:21:44,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:21:44,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:44,618 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2022-11-03 02:21:44,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:44,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:44,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 687930847, now seen corresponding path program 2 times [2022-11-03 02:21:44,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:44,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177235889] [2022-11-03 02:21:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:45,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:45,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177235889] [2022-11-03 02:21:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177235889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147724764] [2022-11-03 02:21:45,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:21:45,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:45,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:45,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:21:45,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:21:45,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:21:45,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:21:45,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:45,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:45,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 02:21:45,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2022-11-03 02:21:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:21:45,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:45,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147724764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:45,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:21:45,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2022-11-03 02:21:45,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028450100] [2022-11-03 02:21:45,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:45,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:21:45,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:21:45,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:21:45,333 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:45,390 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-11-03 02:21:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:21:45,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:21:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:45,391 INFO L225 Difference]: With dead ends: 37 [2022-11-03 02:21:45,391 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 02:21:45,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:21:45,393 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:45,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 02:21:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-03 02:21:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 36 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) [2022-11-03 02:21:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-11-03 02:21:45,404 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 11 [2022-11-03 02:21:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:45,404 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-11-03 02:21:45,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-11-03 02:21:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:21:45,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:45,406 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:45,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:45,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:45,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:45,629 INFO L85 PathProgramCache]: Analyzing trace with hash 841694643, now seen corresponding path program 2 times [2022-11-03 02:21:45,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:45,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829274757] [2022-11-03 02:21:45,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:45,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:45,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:45,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829274757] [2022-11-03 02:21:45,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829274757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:45,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106122263] [2022-11-03 02:21:45,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:21:45,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:45,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:45,808 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:45,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:21:45,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:21:45,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:21:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:21:45,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:45,874 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:21:45,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:21:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:21:45,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:45,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106122263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:45,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:21:45,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [8] total 9 [2022-11-03 02:21:45,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492381670] [2022-11-03 02:21:45,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:45,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:21:45,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:21:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:21:45,908 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:45,926 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-11-03 02:21:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:21:45,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 02:21:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:45,927 INFO L225 Difference]: With dead ends: 35 [2022-11-03 02:21:45,927 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 02:21:45,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:21:45,928 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:45,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:21:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 02:21:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-03 02:21:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-03 02:21:45,932 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 18 [2022-11-03 02:21:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:45,932 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-03 02:21:45,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-03 02:21:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:21:45,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:45,933 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:45,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:46,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:46,155 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:46,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:46,155 INFO L85 PathProgramCache]: Analyzing trace with hash 841694644, now seen corresponding path program 1 times [2022-11-03 02:21:46,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:46,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003050413] [2022-11-03 02:21:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:46,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:46,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:46,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003050413] [2022-11-03 02:21:46,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003050413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:46,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950506785] [2022-11-03 02:21:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:46,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:46,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:46,299 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:46,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:21:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:21:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:46,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:46,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950506785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:46,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001974436] [2022-11-03 02:21:46,510 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:21:46,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:46,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:46,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:46,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:46,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:46,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:46,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:46,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:46,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:21:46,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:46,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:21:46,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:46,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:46,648 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:21:46,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-03 02:21:46,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:46,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:46,813 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:47,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1111#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 02:21:47,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:47,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:47,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-03 02:21:47,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887970228] [2022-11-03 02:21:47,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:47,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:21:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:47,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:21:47,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=314, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:21:47,198 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:47,578 INFO L93 Difference]: Finished difference Result 329 states and 345 transitions. [2022-11-03 02:21:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:21:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 02:21:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:47,580 INFO L225 Difference]: With dead ends: 329 [2022-11-03 02:21:47,581 INFO L226 Difference]: Without dead ends: 329 [2022-11-03 02:21:47,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=314, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:21:47,582 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 594 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:47,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 145 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:21:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-03 02:21:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 51. [2022-11-03 02:21:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 50 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) [2022-11-03 02:21:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-11-03 02:21:47,588 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 18 [2022-11-03 02:21:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:47,588 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-11-03 02:21:47,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-11-03 02:21:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:21:47,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:47,590 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:47,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:47,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:21:47,804 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:47,804 INFO L85 PathProgramCache]: Analyzing trace with hash -596088476, now seen corresponding path program 2 times [2022-11-03 02:21:47,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:47,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667353960] [2022-11-03 02:21:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:47,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:48,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667353960] [2022-11-03 02:21:48,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667353960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391680792] [2022-11-03 02:21:48,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:21:48,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:48,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:48,195 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:48,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:21:48,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:21:48,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:21:48,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:21:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:48,278 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:21:48,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:21:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-03 02:21:48,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:48,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391680792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:48,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:21:48,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [16] total 18 [2022-11-03 02:21:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602215495] [2022-11-03 02:21:48,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:48,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:21:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:21:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:21:48,427 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-03 02:21:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:48,470 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-11-03 02:21:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:21:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 34 [2022-11-03 02:21:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:48,472 INFO L225 Difference]: With dead ends: 65 [2022-11-03 02:21:48,472 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 02:21:48,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:21:48,473 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:48,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:21:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 02:21:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2022-11-03 02:21:48,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-11-03 02:21:48,477 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 34 [2022-11-03 02:21:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:48,478 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-11-03 02:21:48,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-03 02:21:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-11-03 02:21:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:21:48,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:48,479 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:48,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:48,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:21:48,706 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash -596090076, now seen corresponding path program 1 times [2022-11-03 02:21:48,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:48,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460093013] [2022-11-03 02:21:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:48,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-03 02:21:48,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460093013] [2022-11-03 02:21:48,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460093013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:48,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600095057] [2022-11-03 02:21:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:48,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:48,868 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:48,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:21:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:21:48,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:49,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:49,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600095057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1006362540] [2022-11-03 02:21:49,613 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:21:49,613 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:49,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:49,613 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:49,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:49,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:49,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:49,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:49,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:49,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:21:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:49,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:21:49,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:49,785 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:21:49,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-03 02:21:49,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:49,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:49,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:50,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1006362540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:50,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:50,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 16, 16] total 39 [2022-11-03 02:21:50,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788999380] [2022-11-03 02:21:50,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:50,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:21:50,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:50,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:21:50,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=883, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:21:50,245 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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) [2022-11-03 02:21:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:50,385 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-11-03 02:21:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:21:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 34 [2022-11-03 02:21:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:50,386 INFO L225 Difference]: With dead ends: 74 [2022-11-03 02:21:50,386 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:21:50,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=713, Invalid=927, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:21:50,387 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:50,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 32 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:21:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2022-11-03 02:21:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 58 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-11-03 02:21:50,398 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34 [2022-11-03 02:21:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:50,402 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-11-03 02:21:50,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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) [2022-11-03 02:21:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-11-03 02:21:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 02:21:50,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:50,403 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:50,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:50,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:50,618 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1298872181, now seen corresponding path program 1 times [2022-11-03 02:21:50,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:50,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981971925] [2022-11-03 02:21:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:50,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:21:50,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:50,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981971925] [2022-11-03 02:21:50,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981971925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:50,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896959935] [2022-11-03 02:21:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:50,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:50,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:50,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:50,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:21:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:21:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:21:51,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:21:51,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896959935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:51,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49201285] [2022-11-03 02:21:51,468 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:21:51,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:51,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:51,468 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:51,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:51,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:51,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:21:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:51,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:21:51,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:51,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:51,598 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:21:51,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-03 02:21:51,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:51,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:51,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:51,763 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:21:51,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 02:21:51,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:51,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:51,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:51,838 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 02:21:51,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 111 [2022-11-03 02:21:51,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:51,891 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:21:51,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:21:51,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:51,924 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:21:51,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:21:51,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:52,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2348#(and (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))))) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-03 02:21:52,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:52,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:52,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-11-03 02:21:52,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660933679] [2022-11-03 02:21:52,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:52,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:21:52,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:21:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=863, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:21:52,656 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:53,531 INFO L93 Difference]: Finished difference Result 680 states and 712 transitions. [2022-11-03 02:21:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:21:53,531 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2022-11-03 02:21:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:53,534 INFO L225 Difference]: With dead ends: 680 [2022-11-03 02:21:53,534 INFO L226 Difference]: Without dead ends: 680 [2022-11-03 02:21:53,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=543, Invalid=863, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:21:53,535 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1365 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:53,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1365 Valid, 289 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:21:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-11-03 02:21:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 91. [2022-11-03 02:21:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-11-03 02:21:53,544 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 35 [2022-11-03 02:21:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:53,544 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-11-03 02:21:53,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:21:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-11-03 02:21:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:21:53,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:53,546 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:53,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:53,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:21:53,775 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:21:53,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:53,775 INFO L85 PathProgramCache]: Analyzing trace with hash -532054741, now seen corresponding path program 2 times [2022-11-03 02:21:53,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:53,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948157393] [2022-11-03 02:21:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:21:54,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:54,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948157393] [2022-11-03 02:21:54,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948157393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:54,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294475759] [2022-11-03 02:21:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:21:54,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:54,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:54,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:21:55,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:21:55,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:21:55,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:21:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-11-03 02:21:55,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:55,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 5 [2022-11-03 02:21:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-11-03 02:21:55,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294475759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:55,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111375904] [2022-11-03 02:21:55,456 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:21:55,457 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:55,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:55,457 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:55,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:55,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:55,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:55,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:55,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:21:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:55,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:21:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:55,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:55,629 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:21:55,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-03 02:21:55,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:55,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:55,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:55,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:55,849 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:21:55,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 65 treesize of output 49 [2022-11-03 02:21:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:55,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:55,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:56,054 INFO L356 Elim1Store]: treesize reduction 225, result has 14.1 percent of original size [2022-11-03 02:21:56,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 225 treesize of output 191 [2022-11-03 02:21:56,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:56,159 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:21:56,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:21:56,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:56,191 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:21:56,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:21:56,235 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:57,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3561#(and (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= 0 |#NULL.base|) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 4 (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-03 02:21:57,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:57,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:57,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 4, 4] total 40 [2022-11-03 02:21:57,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095753017] [2022-11-03 02:21:57,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:57,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:21:57,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:21:57,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:21:57,217 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:00,929 INFO L93 Difference]: Finished difference Result 730 states and 766 transitions. [2022-11-03 02:22:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-03 02:22:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 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 67 [2022-11-03 02:22:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:00,933 INFO L225 Difference]: With dead ends: 730 [2022-11-03 02:22:00,933 INFO L226 Difference]: Without dead ends: 730 [2022-11-03 02:22:00,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3742, Invalid=8468, Unknown=0, NotChecked=0, Total=12210 [2022-11-03 02:22:00,936 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2882 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2882 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:00,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2882 Valid, 285 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:22:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-11-03 02:22:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 120. [2022-11-03 02:22:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 119 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2022-11-03 02:22:00,947 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 67 [2022-11-03 02:22:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:00,947 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2022-11-03 02:22:00,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2022-11-03 02:22:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:22:00,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:00,949 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:00,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:01,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:22:01,171 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:22:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash -279830977, now seen corresponding path program 1 times [2022-11-03 02:22:01,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:01,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119542405] [2022-11-03 02:22:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:01,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:02,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:02,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119542405] [2022-11-03 02:22:02,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119542405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:02,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949427143] [2022-11-03 02:22:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:02,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:02,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:02,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:02,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:22:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:22:02,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:02,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:04,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949427143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:04,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1703792816] [2022-11-03 02:22:04,037 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:22:04,037 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:04,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:04,037 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:04,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:04,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:04,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:04,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:22:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:04,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:22:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:04,180 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:22:04,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-03 02:22:04,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:04,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:04,345 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:22:04,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 14 [2022-11-03 02:22:04,359 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:04,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5032#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_26| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#src~0#1.base_26|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_26|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_26|)) (= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_26|) 0)) (<= (+ (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_26|)) (= (select |#valid| |v_ULTIMATE.start_main_~#src~0#1.base_26|) 0))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:04,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:04,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:04,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-03 02:22:04,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354554341] [2022-11-03 02:22:04,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:04,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 02:22:04,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:04,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 02:22:04,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2627, Invalid=2923, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:22:04,837 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:07,950 INFO L93 Difference]: Finished difference Result 1443 states and 1517 transitions. [2022-11-03 02:22:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-03 02:22:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 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 71 [2022-11-03 02:22:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:07,956 INFO L225 Difference]: With dead ends: 1443 [2022-11-03 02:22:07,956 INFO L226 Difference]: Without dead ends: 1443 [2022-11-03 02:22:07,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2627, Invalid=2923, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:22:07,958 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4024 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4024 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:07,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4024 Valid, 586 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:22:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-11-03 02:22:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 186. [2022-11-03 02:22:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.1277777777777778) internal successors, (203), 185 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 203 transitions. [2022-11-03 02:22:07,973 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 203 transitions. Word has length 71 [2022-11-03 02:22:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:07,974 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 203 transitions. [2022-11-03 02:22:07,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 203 transitions. [2022-11-03 02:22:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:22:07,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:07,977 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:08,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:08,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:08,198 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:22:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:08,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1822331767, now seen corresponding path program 2 times [2022-11-03 02:22:08,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:08,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106770692] [2022-11-03 02:22:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:08,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:12,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:12,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106770692] [2022-11-03 02:22:12,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106770692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:12,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880193905] [2022-11-03 02:22:12,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:22:12,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:12,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:12,080 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:12,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:22:12,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:22:12,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:22:12,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2022-11-03 02:22:13,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:13,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880193905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:13,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:13,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [66] total 68 [2022-11-03 02:22:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785018135] [2022-11-03 02:22:13,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:13,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:22:13,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:22:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 02:22:13,365 INFO L87 Difference]: Start difference. First operand 186 states and 203 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:13,379 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2022-11-03 02:22:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:22:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 137 [2022-11-03 02:22:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:13,380 INFO L225 Difference]: With dead ends: 192 [2022-11-03 02:22:13,381 INFO L226 Difference]: Without dead ends: 190 [2022-11-03 02:22:13,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 02:22:13,385 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:13,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-11-03 02:22:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-03 02:22:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-11-03 02:22:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 183 states have (on average 1.1256830601092895) internal successors, (206), 188 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 206 transitions. [2022-11-03 02:22:13,399 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 206 transitions. Word has length 137 [2022-11-03 02:22:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:13,401 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 206 transitions. [2022-11-03 02:22:13,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 206 transitions. [2022-11-03 02:22:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-03 02:22:13,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:13,409 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 02:22:13,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:13,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:22:13,623 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:22:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:13,623 INFO L85 PathProgramCache]: Analyzing trace with hash 861527848, now seen corresponding path program 1 times [2022-11-03 02:22:13,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:13,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768637897] [2022-11-03 02:22:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:13,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:22:17,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768637897] [2022-11-03 02:22:17,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768637897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27113531] [2022-11-03 02:22:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:17,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:17,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:17,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:17,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:22:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:22:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:22:17,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:22:23,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27113531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427609043] [2022-11-03 02:22:23,066 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:23,066 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:23,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:23,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:23,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:23,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:23,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:23,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:23,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:23,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:22:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:23,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:22:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:23,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:23,222 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:22:23,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-03 02:22:23,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:23,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:23,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:23,378 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:22:23,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 02:22:23,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:23,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:23,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:23,448 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 02:22:23,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 111 [2022-11-03 02:22:23,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:23,513 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:22:23,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:22:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:23,550 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:22:23,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:22:23,560 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:24,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8482#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:24,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:24,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:24,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2022-11-03 02:22:24,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380015548] [2022-11-03 02:22:24,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-11-03 02:22:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:24,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-11-03 02:22:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8793, Invalid=10113, Unknown=0, NotChecked=0, Total=18906 [2022-11-03 02:22:24,516 INFO L87 Difference]: Start difference. First operand 189 states and 206 transitions. Second operand has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:48,466 INFO L93 Difference]: Finished difference Result 2897 states and 3037 transitions. [2022-11-03 02:22:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-03 02:22:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 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 138 [2022-11-03 02:22:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:48,476 INFO L225 Difference]: With dead ends: 2897 [2022-11-03 02:22:48,477 INFO L226 Difference]: Without dead ends: 2897 [2022-11-03 02:22:48,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=8793, Invalid=10113, Unknown=0, NotChecked=0, Total=18906 [2022-11-03 02:22:48,480 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9246 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 1735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9246 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 3439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1735 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:48,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9246 Valid, 1180 Invalid, 3439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1735 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 02:22:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-11-03 02:22:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 321. [2022-11-03 02:22:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 315 states have (on average 1.073015873015873) internal successors, (338), 320 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 338 transitions. [2022-11-03 02:22:48,505 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 338 transitions. Word has length 138 [2022-11-03 02:22:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:48,505 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 338 transitions. [2022-11-03 02:22:48,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 338 transitions. [2022-11-03 02:22:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-03 02:22:48,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:48,510 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 02:22:48,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:48,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:22:48,739 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:22:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:48,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1119712404, now seen corresponding path program 2 times [2022-11-03 02:22:48,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:48,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274060561] [2022-11-03 02:22:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:48,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 16900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:23:02,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274060561] [2022-11-03 02:23:02,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274060561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:23:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628521850] [2022-11-03 02:23:02,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:23:02,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:02,504 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:23:02,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:23:02,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:23:02,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:23:02,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:23:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:02,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-11-03 02:23:02,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-03 02:23:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2022-11-03 02:23:06,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:23:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2022-11-03 02:23:13,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628521850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:23:13,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1074742511] [2022-11-03 02:23:13,467 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:23:13,467 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:23:13,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:23:13,467 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:23:13,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:23:13,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:13,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:13,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:13,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:13,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:13,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:23:13,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:13,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:23:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:13,586 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:23:13,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-03 02:23:13,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:23:13,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:23:13,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:13,745 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:23:13,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 02:23:13,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:23:13,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:13,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:13,826 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 02:23:13,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 111 [2022-11-03 02:23:13,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:13,882 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:23:13,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:23:13,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:23:13,915 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:23:13,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:23:13,925 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:23:15,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13456#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-03 02:23:15,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:23:15,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:23:15,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 2, 2] total 136 [2022-11-03 02:23:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523099256] [2022-11-03 02:23:15,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:23:15,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-11-03 02:23:15,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:23:15,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-11-03 02:23:15,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8803, Invalid=11219, Unknown=0, NotChecked=0, Total=20022 [2022-11-03 02:23:15,432 INFO L87 Difference]: Start difference. First operand 321 states and 338 transitions. Second operand has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:33,877 INFO L93 Difference]: Finished difference Result 324 states and 338 transitions. [2022-11-03 02:23:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-11-03 02:23:33,878 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 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 270 [2022-11-03 02:23:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:33,880 INFO L225 Difference]: With dead ends: 324 [2022-11-03 02:23:33,880 INFO L226 Difference]: Without dead ends: 324 [2022-11-03 02:23:33,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 796 SyntacticMatches, 4 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11032 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=27032, Invalid=48868, Unknown=0, NotChecked=0, Total=75900 [2022-11-03 02:23:33,888 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 303 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:33,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 73 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 338 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2022-11-03 02:23:33,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-03 02:23:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 318. [2022-11-03 02:23:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 314 states have (on average 1.0477707006369428) internal successors, (329), 317 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 329 transitions. [2022-11-03 02:23:33,895 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 329 transitions. Word has length 270 [2022-11-03 02:23:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:33,896 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 329 transitions. [2022-11-03 02:23:33,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 329 transitions. [2022-11-03 02:23:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-11-03 02:23:33,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:33,901 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:23:33,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:34,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:23:34,115 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:23:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:34,115 INFO L85 PathProgramCache]: Analyzing trace with hash 514028516, now seen corresponding path program 1 times [2022-11-03 02:23:34,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:34,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691348741] [2022-11-03 02:23:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:34,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:47,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:47,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691348741] [2022-11-03 02:23:47,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691348741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:23:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18704523] [2022-11-03 02:23:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:47,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:47,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:47,389 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:23:47,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:23:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:47,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-03 02:23:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:48,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:10,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18704523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:10,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637889169] [2022-11-03 02:24:10,004 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 02:24:10,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:24:10,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:24:10,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:24:10,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:24:10,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:10,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:10,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:10,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:10,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:10,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:24:10,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:10,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:24:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:10,128 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:24:10,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-03 02:24:10,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:24:10,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:24:10,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:24:10,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1637889169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:24:10,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:24:10,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [133, 133, 133] total 272 [2022-11-03 02:24:10,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149611580] [2022-11-03 02:24:10,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:24:10,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:24:10,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:24:10,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36592, Invalid=37664, Unknown=0, NotChecked=0, Total=74256 [2022-11-03 02:24:10,764 INFO L87 Difference]: Start difference. First operand 318 states and 329 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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) [2022-11-03 02:24:10,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:10,874 INFO L93 Difference]: Finished difference Result 328 states and 339 transitions. [2022-11-03 02:24:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:24:10,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 273 [2022-11-03 02:24:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:10,876 INFO L225 Difference]: With dead ends: 328 [2022-11-03 02:24:10,876 INFO L226 Difference]: Without dead ends: 325 [2022-11-03 02:24:10,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3957 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=36862, Invalid=37940, Unknown=0, NotChecked=0, Total=74802 [2022-11-03 02:24:10,882 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:10,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 34 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:24:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-03 02:24:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 315. [2022-11-03 02:24:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.045016077170418) internal successors, (325), 314 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:24:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 325 transitions. [2022-11-03 02:24:10,889 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 325 transitions. Word has length 273 [2022-11-03 02:24:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:10,889 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 325 transitions. [2022-11-03 02:24:10,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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) [2022-11-03 02:24:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 325 transitions. [2022-11-03 02:24:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-11-03 02:24:10,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:10,893 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:10,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:11,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:24:11,107 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:24:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1949300369, now seen corresponding path program 1 times [2022-11-03 02:24:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:11,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012767721] [2022-11-03 02:24:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:11,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:24:22,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:22,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012767721] [2022-11-03 02:24:22,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012767721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:22,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011066447] [2022-11-03 02:24:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:22,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:22,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:22,324 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:22,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:24:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:22,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-03 02:24:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:24:23,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:24:43,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011066447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:43,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268811100] [2022-11-03 02:24:43,939 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 02:24:43,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:24:43,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:24:43,940 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:24:43,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:24:43,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:43,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:43,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:43,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:43,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:24:44,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:44,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:24:44,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:24:44,097 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:24:44,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-11-03 02:24:44,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:24:44,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:24:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:44,322 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:24:44,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 50 treesize of output 39 [2022-11-03 02:24:44,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:24:44,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:24:44,588 INFO L356 Elim1Store]: treesize reduction 271, result has 21.7 percent of original size [2022-11-03 02:24:44,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 208 treesize of output 203 [2022-11-03 02:24:44,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:24:44,770 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:24:44,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:24:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:24:44,804 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:24:44,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:24:44,839 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:24:44,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 14 [2022-11-03 02:24:44,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:24:46,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18832#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_28| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#src~0#1.base_28|) 0) (<= (+ (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_28|)) (<= 0 |v_ULTIMATE.start_main_~#src~0#1.base_28|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_28|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:24:46,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:24:46,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:24:46,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 266 [2022-11-03 02:24:46,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279952011] [2022-11-03 02:24:46,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:24:46,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 267 states [2022-11-03 02:24:46,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:46,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 267 interpolants. [2022-11-03 02:24:46,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36866, Invalid=39586, Unknown=0, NotChecked=0, Total=76452 [2022-11-03 02:24:46,426 INFO L87 Difference]: Start difference. First operand 315 states and 325 transitions. Second operand has 267 states, 267 states have (on average 2.0262172284644193) internal successors, (541), 266 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:49,848 INFO L93 Difference]: Finished difference Result 5314 states and 5585 transitions. [2022-11-03 02:28:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2022-11-03 02:28:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 267 states, 267 states have (on average 2.0262172284644193) internal successors, (541), 266 states have internal predecessors, (541), 0 states have call successors, (0), 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 275 [2022-11-03 02:28:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:49,858 INFO L225 Difference]: With dead ends: 5314 [2022-11-03 02:28:49,858 INFO L226 Difference]: Without dead ends: 5314 [2022-11-03 02:28:49,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5158 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=36866, Invalid=39586, Unknown=0, NotChecked=0, Total=76452 [2022-11-03 02:28:49,861 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22204 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 2925 mSolverCounterSat, 3938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22204 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 6863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3938 IncrementalHoareTripleChecker+Valid, 2925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:49,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22204 Valid, 2395 Invalid, 6863 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3938 Valid, 2925 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-03 02:28:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2022-11-03 02:28:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 581. [2022-11-03 02:28:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 577 states have (on average 1.024263431542461) internal successors, (591), 580 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 591 transitions. [2022-11-03 02:28:49,897 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 591 transitions. Word has length 275 [2022-11-03 02:28:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:49,898 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 591 transitions. [2022-11-03 02:28:49,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 267 states, 267 states have (on average 2.0262172284644193) internal successors, (541), 266 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 591 transitions. [2022-11-03 02:28:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-11-03 02:28:49,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:49,909 INFO L195 NwaCegarLoop]: trace histogram [264, 264, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:49,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-03 02:28:50,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:50,127 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:28:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash 156820385, now seen corresponding path program 2 times [2022-11-03 02:28:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38727778] [2022-11-03 02:28:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:29:41,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38727778] [2022-11-03 02:29:41,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38727778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525244803] [2022-11-03 02:29:41,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:29:41,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:41,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:41,973 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:41,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:29:42,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:29:42,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:29:42,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:29:42,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69698 trivial. 0 not checked. [2022-11-03 02:29:46,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:29:46,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525244803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:46,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:29:46,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [266] total 268 [2022-11-03 02:29:46,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468613281] [2022-11-03 02:29:46,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:46,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:29:46,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:29:46,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35515, Invalid=36577, Unknown=0, NotChecked=0, Total=72092 [2022-11-03 02:29:46,805 INFO L87 Difference]: Start difference. First operand 581 states and 591 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:46,810 INFO L93 Difference]: Finished difference Result 586 states and 597 transitions. [2022-11-03 02:29:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:29:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 541 [2022-11-03 02:29:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:46,812 INFO L225 Difference]: With dead ends: 586 [2022-11-03 02:29:46,812 INFO L226 Difference]: Without dead ends: 584 [2022-11-03 02:29:46,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=35515, Invalid=36577, Unknown=0, NotChecked=0, Total=72092 [2022-11-03 02:29:46,816 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:46,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-11-03 02:29:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-03 02:29:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 583. [2022-11-03 02:29:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 579 states have (on average 1.0241796200345423) internal successors, (593), 582 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 593 transitions. [2022-11-03 02:29:46,828 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 593 transitions. Word has length 541 [2022-11-03 02:29:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:46,829 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 593 transitions. [2022-11-03 02:29:46,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:46,829 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 593 transitions. [2022-11-03 02:29:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-11-03 02:29:46,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:46,833 INFO L195 NwaCegarLoop]: trace histogram [264, 264, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 02:29:46,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:47,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:47,049 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-03 02:29:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2085700816, now seen corresponding path program 1 times [2022-11-03 02:29:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:47,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678025863] [2022-11-03 02:29:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:47,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 69704 backedges. 0 proven. 527 refuted. 0 times theorem prover too weak. 69177 trivial. 0 not checked. [2022-11-03 02:29:48,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678025863] [2022-11-03 02:29:48,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678025863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:29:48,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192124912] [2022-11-03 02:29:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:48,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:48,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:48,146 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:48,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bee3560c-66c5-4a19-b652-6461b7750eef/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:29:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 3540 conjuncts, 266 conjunts are in the unsatisfiable core [2022-11-03 02:29:49,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 69704 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:30:17,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 69704 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:31:40,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192124912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1797550634] [2022-11-03 02:31:40,427 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 02:31:40,427 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:40,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:40,427 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:40,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:40,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:40,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:31:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:40,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:31:40,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:40,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:40,552 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:31:40,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-11-03 02:31:40,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:31:40,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:31:40,689 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:31:40,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-03 02:31:40,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:40,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:40,783 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 02:31:40,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 125 [2022-11-03 02:31:40,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:40,873 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:31:40,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:31:40,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:40,901 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:31:40,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:31:40,912 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:43,401 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31576#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:43,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:43,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:43,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 266, 266] total 534 [2022-11-03 02:31:43,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682319755] [2022-11-03 02:31:43,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:43,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 535 states [2022-11-03 02:31:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:43,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 535 interpolants. [2022-11-03 02:31:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143397, Invalid=148743, Unknown=0, NotChecked=0, Total=292140 [2022-11-03 02:31:43,433 INFO L87 Difference]: Start difference. First operand 583 states and 593 transitions. Second operand has 535 states, 535 states have (on average 2.0186915887850465) internal successors, (1080), 534 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)