./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.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_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/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_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/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_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/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 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 --- 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 02:30:06,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:30:06,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:30:07,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:30:07,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:30:07,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:30:07,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:30:07,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:30:07,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:30:07,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:30:07,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:30:07,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:30:07,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:30:07,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:30:07,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:30:07,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:30:07,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:30:07,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:30:07,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:30:07,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:30:07,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:30:07,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:30:07,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:30:07,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:30:07,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:30:07,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:30:07,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:30:07,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:30:07,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:30:07,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:30:07,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:30:07,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:30:07,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:30:07,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:30:07,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:30:07,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:30:07,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:30:07,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:30:07,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:30:07,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:30:07,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:30:07,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 02:30:07,097 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:30:07,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:30:07,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:30:07,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:30:07,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:30:07,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:30:07,099 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:30:07,100 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:30:07,100 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:30:07,100 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:30:07,100 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:30:07,100 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:30:07,101 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:30:07,101 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:30:07,101 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:30:07,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:30:07,101 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:30:07,102 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:30:07,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:30:07,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:30:07,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:30:07,103 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:30:07,103 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:30:07,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:30:07,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:30:07,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:30:07,104 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:30:07,104 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:30:07,104 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:30:07,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:30:07,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:30:07,105 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:30:07,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:30:07,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:30:07,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:30:07,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:07,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:30:07,106 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:30:07,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:30:07,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:30:07,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:30:07,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:30:07,107 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_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 [2022-11-03 02:30:07,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:30:07,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:30:07,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:30:07,507 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:30:07,507 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:30:07,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2022-11-03 02:30:07,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/data/46cb81293/069c4627cc364e32b3dc099da2d2a774/FLAG5a75aeb08 [2022-11-03 02:30:08,074 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:30:08,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2022-11-03 02:30:08,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/data/46cb81293/069c4627cc364e32b3dc099da2d2a774/FLAG5a75aeb08 [2022-11-03 02:30:08,434 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/data/46cb81293/069c4627cc364e32b3dc099da2d2a774 [2022-11-03 02:30:08,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:30:08,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:30:08,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:08,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:30:08,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:30:08,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7719ca05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08, skipping insertion in model container [2022-11-03 02:30:08,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:30:08,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:30:08,675 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_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2022-11-03 02:30:08,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:08,698 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:30:08,711 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_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i[817,830] [2022-11-03 02:30:08,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:08,732 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:30:08,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08 WrapperNode [2022-11-03 02:30:08,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:08,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:08,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:30:08,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:30:08,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,770 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-03 02:30:08,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:08,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:30:08,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:30:08,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:30:08,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:30:08,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:30:08,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:30:08,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:30:08,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (1/1) ... [2022-11-03 02:30:08,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:08,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:08,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:30:08,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:30:08,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:30:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:30:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:30:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:30:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:30:08,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:30:08,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:30:08,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:30:08,982 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:30:08,984 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:30:09,293 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:30:09,339 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:30:09,339 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:30:09,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:09 BoogieIcfgContainer [2022-11-03 02:30:09,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:30:09,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:30:09,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:30:09,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:30:09,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:30:08" (1/3) ... [2022-11-03 02:30:09,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342bc709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:09, skipping insertion in model container [2022-11-03 02:30:09,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:08" (2/3) ... [2022-11-03 02:30:09,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342bc709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:09, skipping insertion in model container [2022-11-03 02:30:09,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:09" (3/3) ... [2022-11-03 02:30:09,351 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-2.i [2022-11-03 02:30:09,371 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:30:09,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-03 02:30:09,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:30:09,439 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;@b0f1f98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:30:09,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-03 02:30:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:30:09,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:09,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:30:09,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:09,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:09,466 INFO L85 PathProgramCache]: Analyzing trace with hash 113238, now seen corresponding path program 1 times [2022-11-03 02:30:09,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:09,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258267230] [2022-11-03 02:30:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:09,720 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 02:30:09,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:09,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258267230] [2022-11-03 02:30:09,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258267230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:09,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:09,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:30:09,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104685925] [2022-11-03 02:30:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:09,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:09,774 INFO L87 Difference]: Start difference. First operand has 30 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 02:30:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:09,895 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-11-03 02:30:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:09,898 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 02:30:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:09,906 INFO L225 Difference]: With dead ends: 59 [2022-11-03 02:30:09,906 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 02:30:09,908 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 02:30:09,912 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:09,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 02:30:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2022-11-03 02:30:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 2.0) 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 02:30:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-11-03 02:30:09,947 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2022-11-03 02:30:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:09,947 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-11-03 02:30:09,948 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 02:30:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-11-03 02:30:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:30:09,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:09,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:30:09,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:30:09,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash 110837, now seen corresponding path program 1 times [2022-11-03 02:30:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381500667] [2022-11-03 02:30:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:09,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:10,081 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 02:30:10,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381500667] [2022-11-03 02:30:10,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381500667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:10,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:10,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:30:10,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94600708] [2022-11-03 02:30:10,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:10,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:10,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:10,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:10,086 INFO L87 Difference]: Start difference. First operand 30 states and 32 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 02:30:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:10,118 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-11-03 02:30:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:10,119 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 02:30:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:10,119 INFO L225 Difference]: With dead ends: 26 [2022-11-03 02:30:10,120 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 02:30:10,120 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 02:30:10,121 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:10,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 02:30:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-03 02:30:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.75) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-03 02:30:10,127 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 3 [2022-11-03 02:30:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:10,127 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-03 02:30:10,127 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 02:30:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-03 02:30:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:30:10,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:10,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:30:10,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:30:10,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash 110838, now seen corresponding path program 1 times [2022-11-03 02:30:10,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:10,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435951805] [2022-11-03 02:30:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:10,246 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 02:30:10,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:10,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435951805] [2022-11-03 02:30:10,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435951805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:10,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:10,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:30:10,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966237070] [2022-11-03 02:30:10,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:10,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:10,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:10,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:10,250 INFO L87 Difference]: Start difference. First operand 26 states and 28 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 02:30:10,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:10,286 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-11-03 02:30:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:10,287 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 02:30:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:10,288 INFO L225 Difference]: With dead ends: 27 [2022-11-03 02:30:10,288 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 02:30:10,289 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 02:30:10,290 INFO L413 NwaCegarLoop]: 19 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, 28 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 02:30:10,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 02:30:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-03 02:30:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-11-03 02:30:10,295 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 3 [2022-11-03 02:30:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:10,296 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-11-03 02:30:10,296 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 02:30:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-11-03 02:30:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:30:10,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:10,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:30:10,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:30:10,298 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash 106585312, now seen corresponding path program 1 times [2022-11-03 02:30:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:10,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865872032] [2022-11-03 02:30:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:10,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:10,350 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 02:30:10,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865872032] [2022-11-03 02:30:10,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865872032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86072391] [2022-11-03 02:30:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:10,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:10,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:10,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:10,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:30:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:10,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:10,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:10,519 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 02:30:10,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:10,556 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 02:30:10,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86072391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:10,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095561842] [2022-11-03 02:30:10,583 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-03 02:30:10,583 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:10,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:10,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:10,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:10,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:10,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:10,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:10,713 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 02:30:10,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:10,814 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 02:30:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:11,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:11,067 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:30:11,068 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 02:30:11,220 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 02:30:11,278 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 02:30:11,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:11,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '268#(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 02:30:11,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:11,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:11,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 02:30:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802635662] [2022-11-03 02:30:11,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:11,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:30:11,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:11,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:30:11,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:11,586 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:11,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:11,703 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2022-11-03 02:30:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:11,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:30:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:11,705 INFO L225 Difference]: With dead ends: 118 [2022-11-03 02:30:11,705 INFO L226 Difference]: Without dead ends: 118 [2022-11-03 02:30:11,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:11,707 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 200 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:11,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 60 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-03 02:30:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 32. [2022-11-03 02:30:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-03 02:30:11,713 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 5 [2022-11-03 02:30:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:11,714 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-03 02:30:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-03 02:30:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:30:11,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:11,715 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-03 02:30:11,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:11,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-03 02:30:11,929 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash 106582911, now seen corresponding path program 1 times [2022-11-03 02:30:11,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:11,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071879323] [2022-11-03 02:30:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:11,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:12,065 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 02:30:12,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:12,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071879323] [2022-11-03 02:30:12,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071879323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:12,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680237913] [2022-11-03 02:30:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:12,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:12,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:12,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:12,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:30:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:30:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,144 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 02:30:12,152 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 02:30:12,193 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 02:30:12,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:12,265 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 02:30:12,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680237913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:12,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717487352] [2022-11-03 02:30:12,267 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-03 02:30:12,268 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:12,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:12,268 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:12,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:12,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,293 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 02:30:12,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,329 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 02:30:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:12,456 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:30:12,457 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 02:30:12,634 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 02:30:12,658 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 02:30:12,669 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:13,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '454#(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 02:30:13,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:13,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:13,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-03 02:30:13,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607092429] [2022-11-03 02:30:13,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:13,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:30:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:30:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:30:13,039 INFO L87 Difference]: Start difference. First operand 32 states and 36 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 02:30:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:13,146 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-03 02:30:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:13,147 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 02:30:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:13,148 INFO L225 Difference]: With dead ends: 32 [2022-11-03 02:30:13,148 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 02:30:13,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:30:13,149 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:13,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 40 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 02:30:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-03 02:30:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-11-03 02:30:13,153 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 5 [2022-11-03 02:30:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:13,153 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-11-03 02:30:13,153 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 02:30:13,153 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-11-03 02:30:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:30:13,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:13,154 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2022-11-03 02:30:13,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:13,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:13,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash -891056389, now seen corresponding path program 2 times [2022-11-03 02:30:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:13,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359516684] [2022-11-03 02:30:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:13,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:13,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359516684] [2022-11-03 02:30:13,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359516684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:13,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680330279] [2022-11-03 02:30:13,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:13,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:13,548 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:13,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:30:13,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:30:13,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:13,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:30:13,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:13,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:13,635 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 02:30:13,641 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 02:30:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:30:13,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:13,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680330279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:13,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:13,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-11-03 02:30:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807516431] [2022-11-03 02:30:13,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:13,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:13,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:13,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:13,716 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 02:30:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:13,773 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-11-03 02:30:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:13,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 11 [2022-11-03 02:30:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:13,776 INFO L225 Difference]: With dead ends: 49 [2022-11-03 02:30:13,776 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 02:30:13,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:13,777 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:13,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 02:30:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2022-11-03 02:30:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 32 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 02:30:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-11-03 02:30:13,781 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 11 [2022-11-03 02:30:13,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:13,781 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-11-03 02:30:13,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 02:30:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-11-03 02:30:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:30:13,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:13,782 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2022-11-03 02:30:13,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:14,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:14,005 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:14,006 INFO L85 PathProgramCache]: Analyzing trace with hash -891058790, now seen corresponding path program 2 times [2022-11-03 02:30:14,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:14,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807414114] [2022-11-03 02:30:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:14,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:14,254 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 02:30:14,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:14,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807414114] [2022-11-03 02:30:14,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807414114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:14,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080798516] [2022-11-03 02:30:14,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:14,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:14,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:14,256 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:14,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:30:14,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:30:14,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:30:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:14,342 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 02:30:14,346 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 02:30:14,436 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 02:30:14,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:14,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080798516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:14,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:14,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2022-11-03 02:30:14,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154501114] [2022-11-03 02:30:14,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:14,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:14,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:14,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:30:14,439 INFO L87 Difference]: Start difference. First operand 33 states and 35 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 02:30:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:14,492 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-03 02:30:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:14,493 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 02:30:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:14,493 INFO L225 Difference]: With dead ends: 32 [2022-11-03 02:30:14,493 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 02:30:14,494 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 02:30:14,495 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:14,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 02:30:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-03 02:30:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.434782608695652) 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 02:30:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-11-03 02:30:14,506 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 11 [2022-11-03 02:30:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:14,507 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-11-03 02:30:14,507 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 02:30:14,507 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-11-03 02:30:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 02:30:14,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:14,508 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:14,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:14,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:14,721 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1731944107, now seen corresponding path program 1 times [2022-11-03 02:30:14,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:14,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206919926] [2022-11-03 02:30:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:14,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:30:14,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:14,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206919926] [2022-11-03 02:30:14,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206919926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:14,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:14,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:30:14,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161547393] [2022-11-03 02:30:14,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:14,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:30:14,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:14,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:30:14,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:30:14,764 INFO L87 Difference]: Start difference. First operand 31 states and 33 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 02:30:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:14,785 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-03 02:30:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:30:14,785 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 14 [2022-11-03 02:30:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:14,786 INFO L225 Difference]: With dead ends: 29 [2022-11-03 02:30:14,786 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 02:30:14,786 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 02:30:14,787 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 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 02:30:14,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 02:30:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-03 02:30:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3478260869565217) 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 02:30:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-03 02:30:14,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 14 [2022-11-03 02:30:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:14,797 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-03 02:30:14,800 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 02:30:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-03 02:30:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 02:30:14,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:14,801 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:14,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:30:14,802 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:14,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1731944108, now seen corresponding path program 1 times [2022-11-03 02:30:14,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:14,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504857302] [2022-11-03 02:30:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:14,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504857302] [2022-11-03 02:30:14,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504857302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587080362] [2022-11-03 02:30:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:14,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:14,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:14,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:30:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:30:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:14,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:15,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587080362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943152872] [2022-11-03 02:30:15,063 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:30:15,063 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:15,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:15,063 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:15,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:15,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:15,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:15,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:15,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:15,101 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 02:30:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:15,141 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 02:30:15,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:15,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:15,243 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:30:15,244 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 02:30:15,391 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 02:30:15,409 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 02:30:15,513 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:16,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '897#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_69| Int)) (and (<= 0 (+ (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_69| 4))) 2147483648)) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_69| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 4 (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_69| 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_69| 4))) 2147483647) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_69|))) (= |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) (<= 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 02:30:16,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:16,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:16,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-03 02:30:16,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829524078] [2022-11-03 02:30:16,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:16,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:30:16,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:30:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:30:16,195 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 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 02:30:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:16,407 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2022-11-03 02:30:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:30:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 02:30:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:16,409 INFO L225 Difference]: With dead ends: 219 [2022-11-03 02:30:16,409 INFO L226 Difference]: Without dead ends: 219 [2022-11-03 02:30:16,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:30:16,409 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 385 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:16,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 120 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-03 02:30:16,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 41. [2022-11-03 02:30:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:30:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-11-03 02:30:16,414 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 14 [2022-11-03 02:30:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:16,414 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-11-03 02:30:16,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 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 02:30:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-11-03 02:30:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:30:16,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:16,415 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:16,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:16,633 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2001186954, now seen corresponding path program 2 times [2022-11-03 02:30:16,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:16,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387351178] [2022-11-03 02:30:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:16,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:16,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387351178] [2022-11-03 02:30:16,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387351178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:16,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646409704] [2022-11-03 02:30:16,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:16,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:16,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:16,833 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:16,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:30:16,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:30:16,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:16,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:30:16,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:16,930 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:30:16,931 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 02:30:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-03 02:30:17,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:17,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646409704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:17,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:17,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-11-03 02:30:17,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538942166] [2022-11-03 02:30:17,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:17,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:17,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:17,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:30:17,056 INFO L87 Difference]: Start difference. First operand 41 states and 43 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 02:30:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:17,099 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-11-03 02:30:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:17,100 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 26 [2022-11-03 02:30:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:17,100 INFO L225 Difference]: With dead ends: 54 [2022-11-03 02:30:17,100 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 02:30:17,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:30:17,101 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:17,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 02:30:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2022-11-03 02:30:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.236842105263158) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 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 02:30:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-11-03 02:30:17,109 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 26 [2022-11-03 02:30:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:17,110 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-11-03 02:30:17,110 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 02:30:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-11-03 02:30:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:30:17,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:17,112 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:17,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:17,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:30:17,312 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:17,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1907252070, now seen corresponding path program 1 times [2022-11-03 02:30:17,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:17,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681950438] [2022-11-03 02:30:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:17,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:17,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:17,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681950438] [2022-11-03 02:30:17,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681950438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:17,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700259856] [2022-11-03 02:30:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:17,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:17,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:17,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:17,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:30:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:17,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:30:17,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:17,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:17,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700259856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767447367] [2022-11-03 02:30:17,869 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:30:17,869 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:17,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:17,870 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:17,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:17,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:17,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:17,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:17,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:17,891 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 02:30:17,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:17,925 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 02:30:17,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:17,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:18,012 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:30:18,013 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 02:30:18,216 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 02:30:18,237 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 02:30:18,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:18,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:18,329 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:30:18,330 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 02:30:18,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:18,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:18,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:18,537 INFO L356 Elim1Store]: treesize reduction 225, result has 14.1 percent of original size [2022-11-03 02:30:18,537 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 02:30:18,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:18,689 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:30:18,690 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 02:30:18,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:18,752 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:30:18,753 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 02:30:18,783 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:19,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1533#(and (= |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 |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 02:30:19,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:19,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:19,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-03 02:30:19,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162563653] [2022-11-03 02:30:19,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:19,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:30:19,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:19,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:30:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:30:19,302 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 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 02:30:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:19,810 INFO L93 Difference]: Finished difference Result 458 states and 482 transitions. [2022-11-03 02:30:19,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:30:19,811 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 02:30:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:19,816 INFO L225 Difference]: With dead ends: 458 [2022-11-03 02:30:19,816 INFO L226 Difference]: Without dead ends: 458 [2022-11-03 02:30:19,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:30:19,817 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 822 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:19,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 230 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:30:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-03 02:30:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 68. [2022-11-03 02:30:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-11-03 02:30:19,834 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 27 [2022-11-03 02:30:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:19,835 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-11-03 02:30:19,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 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 02:30:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-11-03 02:30:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:30:19,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:19,839 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:19,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:20,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:20,054 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:20,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:20,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1372091014, now seen corresponding path program 2 times [2022-11-03 02:30:20,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:20,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733692214] [2022-11-03 02:30:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:20,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:20,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:20,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733692214] [2022-11-03 02:30:20,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733692214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049568643] [2022-11-03 02:30:20,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:20,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:20,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:20,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:20,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:30:20,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:30:20,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:20,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:30:20,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-11-03 02:30:20,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:21,108 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 02:30:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-11-03 02:30:21,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049568643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:21,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [199887320] [2022-11-03 02:30:21,219 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:30:21,219 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:21,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:21,219 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:21,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:21,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,258 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 02:30:21,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,289 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 02:30:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:21,401 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:30:21,401 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 02:30:21,539 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 02:30:21,568 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 02:30:21,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:21,655 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:30:21,655 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 02:30:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:21,868 INFO L356 Elim1Store]: treesize reduction 225, result has 14.1 percent of original size [2022-11-03 02:30:21,868 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 02:30:21,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:21,971 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:30:21,971 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 02:30:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:22,026 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:30:22,027 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 02:30:22,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:22,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2397#(and (= |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 |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 02:30:22,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:22,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:22,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 4, 4] total 32 [2022-11-03 02:30:22,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816000048] [2022-11-03 02:30:22,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:22,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:30:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:30:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:30:22,767 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:24,969 INFO L93 Difference]: Finished difference Result 476 states and 501 transitions. [2022-11-03 02:30:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-03 02:30:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-03 02:30:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:24,972 INFO L225 Difference]: With dead ends: 476 [2022-11-03 02:30:24,972 INFO L226 Difference]: Without dead ends: 476 [2022-11-03 02:30:24,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1832, Invalid=4330, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:30:24,975 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2063 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2063 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:24,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2063 Valid, 198 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:30:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-03 02:30:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 79. [2022-11-03 02:30:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.178082191780822) internal successors, (86), 78 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-11-03 02:30:24,980 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 51 [2022-11-03 02:30:24,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:24,981 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-11-03 02:30:24,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-11-03 02:30:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:30:24,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:24,982 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:25,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:25,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:25,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash 473413716, now seen corresponding path program 1 times [2022-11-03 02:30:25,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:25,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44299770] [2022-11-03 02:30:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:25,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-11-03 02:30:25,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:25,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44299770] [2022-11-03 02:30:25,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44299770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:25,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:25,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31456276] [2022-11-03 02:30:25,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:30:25,311 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:25,342 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2022-11-03 02:30:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:25,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-03 02:30:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:25,343 INFO L225 Difference]: With dead ends: 83 [2022-11-03 02:30:25,344 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:30:25,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:30:25,344 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:25,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:30:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-11-03 02:30:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 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 02:30:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-11-03 02:30:25,348 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 53 [2022-11-03 02:30:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:25,349 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-11-03 02:30:25,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-11-03 02:30:25,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:30:25,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:25,350 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:25,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:30:25,351 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:25,351 INFO L85 PathProgramCache]: Analyzing trace with hash 473414916, now seen corresponding path program 1 times [2022-11-03 02:30:25,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:25,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645438044] [2022-11-03 02:30:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:25,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:26,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645438044] [2022-11-03 02:30:26,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645438044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:26,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229785015] [2022-11-03 02:30:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:26,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:26,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:26,040 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:26,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:30:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:30:26,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:26,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:27,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229785015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:27,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719425930] [2022-11-03 02:30:27,153 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:30:27,158 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:27,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:27,159 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:27,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:27,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:27,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:27,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:27,189 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 02:30:27,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:27,219 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 02:30:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:27,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:27,314 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:30:27,315 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 02:30:27,437 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 02:30:27,455 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 02:30:27,542 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:30:27,543 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 02:30:27,569 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:28,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3570#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_188| Int) (|v_ULTIMATE.start_main_~#src~0#1.base_27| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~i~0#1_188|) (= (select |#valid| |v_ULTIMATE.start_main_~#src~0#1.base_27|) 0) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_27|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (<= (* |v_ULTIMATE.start_main_~i~0#1_188| 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_27|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_27|) (+ (* |v_ULTIMATE.start_main_~i~0#1_188| 4) (- 4))) 2147483647) (<= 0 |v_ULTIMATE.start_main_~#src~0#1.base_27|) (<= 4 (* |v_ULTIMATE.start_main_~i~0#1_188| 4)) (<= (+ (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_27|)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_27|) (+ (* |v_ULTIMATE.start_main_~i~0#1_188| 4) (- 4))) 2147483648)))) (= |#NULL.offset| 0) (<= 0 (* |ULTIMATE.start_main_~i~0#1| 4)) (= |ULTIMATE.start_main_~x~0#1| 0) (not (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~i~0#1|)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:30:28,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:28,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:28,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-03 02:30:28,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843370328] [2022-11-03 02:30:28,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:28,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 02:30:28,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:28,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 02:30:28,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1590, Invalid=1832, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:30:28,239 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:30:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:29,730 INFO L93 Difference]: Finished difference Result 967 states and 1016 transitions. [2022-11-03 02:30:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 02:30:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 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 53 [2022-11-03 02:30:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:29,733 INFO L225 Difference]: With dead ends: 967 [2022-11-03 02:30:29,734 INFO L226 Difference]: Without dead ends: 967 [2022-11-03 02:30:29,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1590, Invalid=1832, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:30:29,736 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3262 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3262 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:29,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3262 Valid, 500 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:30:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-11-03 02:30:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 131. [2022-11-03 02:30:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.104) internal successors, (138), 130 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 02:30:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 138 transitions. [2022-11-03 02:30:29,744 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 138 transitions. Word has length 53 [2022-11-03 02:30:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:29,744 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 138 transitions. [2022-11-03 02:30:29,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:30:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 138 transitions. [2022-11-03 02:30:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:30:29,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:29,746 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:29,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:29,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:30:29,961 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash -140202203, now seen corresponding path program 2 times [2022-11-03 02:30:29,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:29,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806520987] [2022-11-03 02:30:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:29,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:32,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806520987] [2022-11-03 02:30:32,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806520987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138577188] [2022-11-03 02:30:32,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:32,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:32,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:32,246 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:32,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:30:32,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:30:32,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:32,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:30:32,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2022-11-03 02:30:33,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:33,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138577188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:33,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:33,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [50] total 52 [2022-11-03 02:30:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836392805] [2022-11-03 02:30:33,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:33,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:33,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:33,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:30:33,174 INFO L87 Difference]: Start difference. First operand 131 states and 138 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:33,185 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2022-11-03 02:30:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:33,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-03 02:30:33,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:33,186 INFO L225 Difference]: With dead ends: 132 [2022-11-03 02:30:33,187 INFO L226 Difference]: Without dead ends: 129 [2022-11-03 02:30:33,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:30:33,191 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:33,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-11-03 02:30:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-03 02:30:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-03 02:30:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 128 states have internal predecessors, (135), 0 states have call successors, (0), 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 02:30:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2022-11-03 02:30:33,200 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 103 [2022-11-03 02:30:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:33,200 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2022-11-03 02:30:33,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:33,201 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2022-11-03 02:30:33,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:30:33,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:33,208 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 02:30:33,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:33,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:30:33,437 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash -575777705, now seen corresponding path program 1 times [2022-11-03 02:30:33,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:33,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637827029] [2022-11-03 02:30:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:33,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:30:35,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:35,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637827029] [2022-11-03 02:30:35,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637827029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:35,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439421356] [2022-11-03 02:30:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:35,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:35,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:35,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:30:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:36,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:30:36,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:30:36,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:30:39,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439421356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:39,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1518749043] [2022-11-03 02:30:39,372 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:30:39,372 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:39,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:39,373 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:39,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:39,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:39,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:39,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:39,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:39,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:39,401 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 02:30:39,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:39,426 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 02:30:39,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:39,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:39,493 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:30:39,493 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 02:30:39,594 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 02:30:39,620 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 02:30:39,662 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:30:39,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-03 02:30:39,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:39,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:39,781 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 02:30:39,782 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 115 [2022-11-03 02:30:39,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:39,854 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:30:39,855 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 02:30:39,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:39,885 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:30:39,885 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 02:30:39,895 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:40,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6027#(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 02:30:40,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:40,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:40,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-03 02:30:40,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217317078] [2022-11-03 02:30:40,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:40,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-03 02:30:40,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:40,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-03 02:30:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5065, Invalid=6065, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 02:30:40,739 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 101 states, 101 states have (on average 2.01980198019802) internal successors, (204), 100 states have internal predecessors, (204), 0 states have call successors, (0), 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 02:30:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:49,040 INFO L93 Difference]: Finished difference Result 1963 states and 2062 transitions. [2022-11-03 02:30:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-03 02:30:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.01980198019802) internal successors, (204), 100 states have internal predecessors, (204), 0 states have call successors, (0), 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 106 [2022-11-03 02:30:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:49,047 INFO L225 Difference]: With dead ends: 1963 [2022-11-03 02:30:49,047 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 02:30:49,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 258 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5065, Invalid=6065, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 02:30:49,051 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7385 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7385 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:49,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7385 Valid, 1000 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:30:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 02:30:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 229. [2022-11-03 02:30:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.053811659192825) internal successors, (235), 228 states have internal predecessors, (235), 0 states have call successors, (0), 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 02:30:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 235 transitions. [2022-11-03 02:30:49,068 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 235 transitions. Word has length 106 [2022-11-03 02:30:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:49,069 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 235 transitions. [2022-11-03 02:30:49,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.01980198019802) internal successors, (204), 100 states have internal predecessors, (204), 0 states have call successors, (0), 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 02:30:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 235 transitions. [2022-11-03 02:30:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-03 02:30:49,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:49,072 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 02:30:49,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:49,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:49,297 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:30:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1834133611, now seen corresponding path program 2 times [2022-11-03 02:30:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:49,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695893160] [2022-11-03 02:30:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9608 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:30:57,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:57,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695893160] [2022-11-03 02:30:57,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695893160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:57,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864374778] [2022-11-03 02:30:57,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:57,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:57,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:57,042 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:57,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:30:57,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 02:30:57,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:30:57,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:57,227 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 02:30:57,234 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 02:30:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9608 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9605 trivial. 0 not checked. [2022-11-03 02:30:59,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9608 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9605 trivial. 0 not checked. [2022-11-03 02:31:03,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864374778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:03,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901861666] [2022-11-03 02:31:03,711 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:31:03,711 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:03,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:03,712 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:03,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:03,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:03,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:03,736 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 02:31:03,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:03,791 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 02:31:03,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:03,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:03,887 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:31:03,888 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 02:31:04,034 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 02:31:04,057 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 02:31:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:04,151 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:31:04,151 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 02:31:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:04,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:04,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:04,352 INFO L356 Elim1Store]: treesize reduction 225, result has 14.1 percent of original size [2022-11-03 02:31:04,353 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 02:31:04,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:04,431 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:31:04,431 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 02:31:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:04,461 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:31:04,461 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 02:31:04,469 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:05,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9559#(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 02:31:05,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:05,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:05,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 2, 2] total 104 [2022-11-03 02:31:05,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479770044] [2022-11-03 02:31:05,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:05,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-03 02:31:05,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-03 02:31:05,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5078, Invalid=7132, Unknown=0, NotChecked=0, Total=12210 [2022-11-03 02:31:05,766 INFO L87 Difference]: Start difference. First operand 229 states and 235 transitions. Second operand has 105 states, 105 states have (on average 2.1619047619047618) internal successors, (227), 104 states have internal predecessors, (227), 0 states have call successors, (0), 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 02:31:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:16,583 INFO L93 Difference]: Finished difference Result 234 states and 240 transitions. [2022-11-03 02:31:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-03 02:31:16,584 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.1619047619047618) internal successors, (227), 104 states have internal predecessors, (227), 0 states have call successors, (0), 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 206 [2022-11-03 02:31:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:16,585 INFO L225 Difference]: With dead ends: 234 [2022-11-03 02:31:16,585 INFO L226 Difference]: Without dead ends: 234 [2022-11-03 02:31:16,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6245 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=15691, Invalid=29465, Unknown=0, NotChecked=0, Total=45156 [2022-11-03 02:31:16,593 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 223 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:16,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 78 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 243 Invalid, 0 Unknown, 206 Unchecked, 0.4s Time] [2022-11-03 02:31:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-03 02:31:16,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2022-11-03 02:31:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.04) internal successors, (234), 229 states have internal predecessors, (234), 0 states have call successors, (0), 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 02:31:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 234 transitions. [2022-11-03 02:31:16,604 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 234 transitions. Word has length 206 [2022-11-03 02:31:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:16,605 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 234 transitions. [2022-11-03 02:31:16,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.1619047619047618) internal successors, (227), 104 states have internal predecessors, (227), 0 states have call successors, (0), 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 02:31:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 234 transitions. [2022-11-03 02:31:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-03 02:31:16,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:16,612 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:16,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:16,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:31:16,825 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:31:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1464508073, now seen corresponding path program 1 times [2022-11-03 02:31:16,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:16,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774849118] [2022-11-03 02:31:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9803 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9801 trivial. 0 not checked. [2022-11-03 02:31:17,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:17,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774849118] [2022-11-03 02:31:17,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774849118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:17,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189909774] [2022-11-03 02:31:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:17,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:17,353 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:17,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:31:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:17,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1373 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 02:31:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9803 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:31:22,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9803 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:31:34,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189909774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:34,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972485878] [2022-11-03 02:31:34,110 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:31:34,111 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:34,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:34,111 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:34,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:34,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:34,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:34,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:34,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:34,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:34,139 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 02:31:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:34,162 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 02:31:34,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:34,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:34,238 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:31:34,239 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 02:31:34,363 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 02:31:34,378 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 02:31:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:34,451 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:31:34,451 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 02:31:34,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:34,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:34,656 INFO L356 Elim1Store]: treesize reduction 281, result has 18.8 percent of original size [2022-11-03 02:31:34,656 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 209 treesize of output 194 [2022-11-03 02:31:34,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:34,785 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:31:34,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:31:34,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:34,813 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:31:34,813 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 02:31:34,826 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:36,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11687#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~i~0#1|) (<= 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) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:36,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:36,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:36,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 101, 101] total 205 [2022-11-03 02:31:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64182888] [2022-11-03 02:31:36,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-11-03 02:31:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-11-03 02:31:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20547, Invalid=25035, Unknown=0, NotChecked=0, Total=45582 [2022-11-03 02:31:36,252 INFO L87 Difference]: Start difference. First operand 230 states and 234 transitions. Second operand has 206 states, 206 states have (on average 2.0436893203883497) internal successors, (421), 205 states have internal predecessors, (421), 0 states have call successors, (0), 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 02:35:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:30,357 INFO L93 Difference]: Finished difference Result 5405 states and 5805 transitions. [2022-11-03 02:35:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 603 states. [2022-11-03 02:35:30,358 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.0436893203883497) internal successors, (421), 205 states have internal predecessors, (421), 0 states have call successors, (0), 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 209 [2022-11-03 02:35:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:30,374 INFO L225 Difference]: With dead ends: 5405 [2022-11-03 02:35:30,374 INFO L226 Difference]: Without dead ends: 5405 [2022-11-03 02:35:30,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93104 ImplicationChecksByTransitivity, 58.0s TimeCoverageRelationStatistics Valid=121844, Invalid=253312, Unknown=0, NotChecked=0, Total=375156 [2022-11-03 02:35:30,395 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31175 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2627 mSolverCounterSat, 5015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31175 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 7642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 5015 IncrementalHoareTripleChecker+Valid, 2627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:30,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31175 Valid, 1413 Invalid, 7642 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [5015 Valid, 2627 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 02:35:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5405 states. [2022-11-03 02:35:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5405 to 434. [2022-11-03 02:35:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 429 states have (on average 1.0233100233100234) internal successors, (439), 433 states have internal predecessors, (439), 0 states have call successors, (0), 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 02:35:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 439 transitions. [2022-11-03 02:35:30,433 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 439 transitions. Word has length 209 [2022-11-03 02:35:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:30,434 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 439 transitions. [2022-11-03 02:35:30,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.0436893203883497) internal successors, (421), 205 states have internal predecessors, (421), 0 states have call successors, (0), 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 02:35:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 439 transitions. [2022-11-03 02:35:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-11-03 02:35:30,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:30,442 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:30,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:30,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:35:30,657 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-03 02:35:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2067199526, now seen corresponding path program 1 times [2022-11-03 02:35:30,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:30,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626211393] [2022-11-03 02:35:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:30,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 40002 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:35:59,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:59,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626211393] [2022-11-03 02:35:59,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626211393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:59,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331221759] [2022-11-03 02:35:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:59,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:59,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:59,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bfc4d5-07a3-4164-ae39-ff8dc2983cd7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:35:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 2693 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-03 02:35:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 40002 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:36:00,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 40002 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:36:47,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331221759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:47,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672338258] [2022-11-03 02:36:47,193 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:36:47,194 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:36:47,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:36:47,194 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:36:47,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:36:47,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:47,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:47,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:47,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:47,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 02:36:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:47,255 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 02:36:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:47,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:47,423 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:36:47,423 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 02:36:47,539 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 02:36:47,552 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 02:36:47,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:47,628 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:36:47,629 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 02:36:47,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:47,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:47,841 INFO L356 Elim1Store]: treesize reduction 281, result has 18.8 percent of original size [2022-11-03 02:36:47,841 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 193 [2022-11-03 02:36:47,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:48,008 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:36:48,008 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 02:36:48,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:36:48,041 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:36:48,042 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 02:36:48,065 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:36:48,066 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 11 [2022-11-03 02:36:48,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:36:50,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21197#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (exists ((|v_ULTIMATE.start_main_~#dst~0#1.base_21| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#dst~0#1.base_21|) (= (select |#valid| |v_ULTIMATE.start_main_~#dst~0#1.base_21|) 0))) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~i~0#1|)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:36:50,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:36:50,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:36:50,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-03 02:36:50,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120500395] [2022-11-03 02:36:50,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:50,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-03 02:36:50,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:50,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-03 02:36:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82638, Invalid=87518, Unknown=0, NotChecked=0, Total=170156 [2022-11-03 02:36:50,031 INFO L87 Difference]: Start difference. First operand 434 states and 439 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 404 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)