./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:33:39,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:33:39,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:33:39,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:33:39,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:33:39,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:33:39,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:33:39,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:33:39,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:33:39,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:33:39,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:33:39,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:33:39,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:33:39,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:33:39,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:33:39,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:33:39,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:33:39,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:33:39,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:33:39,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:33:39,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:33:39,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:33:39,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:33:39,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:33:39,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:33:39,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:33:39,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:33:39,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:33:39,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:33:39,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:33:39,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:33:39,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:33:39,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:33:39,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:33:39,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:33:39,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:33:39,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:33:39,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:33:39,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:33:39,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:33:39,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:33:39,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:33:40,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:33:40,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:33:40,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:33:40,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:33:40,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:33:40,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:33:40,015 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:33:40,016 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:33:40,016 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:33:40,016 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:33:40,016 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:33:40,016 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:33:40,016 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:33:40,017 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:33:40,017 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:33:40,017 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:33:40,017 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:33:40,017 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:33:40,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:33:40,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:33:40,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:33:40,018 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:33:40,018 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:33:40,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:33:40,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:33:40,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:33:40,019 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:33:40,019 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:33:40,019 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:33:40,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:33:40,020 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:33:40,020 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:33:40,020 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:33:40,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:33:40,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:33:40,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:33:40,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:33:40,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:33:40,021 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:33:40,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:33:40,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:33:40,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:33:40,022 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2021-11-21 01:33:40,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:33:40,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:33:40,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:33:40,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:33:40,307 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:33:40,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2021-11-21 01:33:40,373 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/data/c8863e65f/0366b7d2e22a4400a00671614d789751/FLAG0e8136fe9 [2021-11-21 01:33:40,937 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:33:40,937 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2021-11-21 01:33:40,948 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/data/c8863e65f/0366b7d2e22a4400a00671614d789751/FLAG0e8136fe9 [2021-11-21 01:33:41,291 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/data/c8863e65f/0366b7d2e22a4400a00671614d789751 [2021-11-21 01:33:41,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:33:41,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:33:41,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:33:41,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:33:41,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:33:41,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@314a7a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41, skipping insertion in model container [2021-11-21 01:33:41,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:33:41,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:33:41,569 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_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2021-11-21 01:33:41,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:33:41,602 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:33:41,617 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_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2021-11-21 01:33:41,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:33:41,654 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:33:41,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41 WrapperNode [2021-11-21 01:33:41,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:33:41,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:33:41,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:33:41,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:33:41,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,714 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-21 01:33:41,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:33:41,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:33:41,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:33:41,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:33:41,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:33:41,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:33:41,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:33:41,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:33:41,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (1/1) ... [2021-11-21 01:33:41,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:33:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:41,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:33:41,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:33:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:33:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:33:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:33:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:33:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:33:41,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:33:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:33:41,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:33:41,917 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:33:41,920 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:33:42,162 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:33:42,187 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:33:42,188 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:33:42,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:33:42 BoogieIcfgContainer [2021-11-21 01:33:42,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:33:42,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:33:42,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:33:42,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:33:42,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:33:41" (1/3) ... [2021-11-21 01:33:42,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e1789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:33:42, skipping insertion in model container [2021-11-21 01:33:42,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:41" (2/3) ... [2021-11-21 01:33:42,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e1789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:33:42, skipping insertion in model container [2021-11-21 01:33:42,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:33:42" (3/3) ... [2021-11-21 01:33:42,199 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2021-11-21 01:33:42,204 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:33:42,205 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-21 01:33:42,248 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:33:42,255 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:33:42,255 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-21 01:33:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:33:42,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:42,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:33:42,280 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:42,298 INFO L85 PathProgramCache]: Analyzing trace with hash 114230, now seen corresponding path program 1 times [2021-11-21 01:33:42,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:42,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943742549] [2021-11-21 01:33:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:42,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:42,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:42,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943742549] [2021-11-21 01:33:42,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943742549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:42,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:42,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:33:42,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771019437] [2021-11-21 01:33:42,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:42,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:33:42,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:42,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:33:42,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:42,502 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:42,587 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-11-21 01:33:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:33:42,590 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 [2021-11-21 01:33:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:42,598 INFO L225 Difference]: With dead ends: 67 [2021-11-21 01:33:42,600 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 01:33:42,602 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:33:42,608 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:42,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 01:33:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2021-11-21 01:33:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 2.0) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-11-21 01:33:42,677 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 3 [2021-11-21 01:33:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:42,677 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-11-21 01:33:42,678 INFO L471 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) [2021-11-21 01:33:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-11-21 01:33:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:33:42,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:42,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:33:42,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:33:42,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 111798, now seen corresponding path program 1 times [2021-11-21 01:33:42,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:42,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202200275] [2021-11-21 01:33:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:42,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:42,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:42,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202200275] [2021-11-21 01:33:42,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202200275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:42,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:42,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 01:33:42,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814539537] [2021-11-21 01:33:42,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:42,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:33:42,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:42,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:33:42,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:42,749 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:42,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:42,785 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-21 01:33:42,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:33:42,786 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 [2021-11-21 01:33:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:42,787 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:33:42,787 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 01:33:42,787 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:33:42,789 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:42,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:42,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 01:33:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-21 01:33:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-21 01:33:42,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 3 [2021-11-21 01:33:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:42,796 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-21 01:33:42,797 INFO L471 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) [2021-11-21 01:33:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-21 01:33:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:33:42,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:42,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:33:42,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:33:42,798 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 111799, now seen corresponding path program 1 times [2021-11-21 01:33:42,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:42,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323311857] [2021-11-21 01:33:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:42,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:42,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323311857] [2021-11-21 01:33:42,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323311857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:42,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:42,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 01:33:42,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084040274] [2021-11-21 01:33:42,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:42,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:33:42,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:42,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:33:42,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:42,853 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:42,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:42,892 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-21 01:33:42,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:33:42,893 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 [2021-11-21 01:33:42,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:42,894 INFO L225 Difference]: With dead ends: 30 [2021-11-21 01:33:42,894 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 01:33:42,894 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:33:42,896 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:42,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 01:33:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-21 01:33:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-21 01:33:42,902 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2021-11-21 01:33:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:42,902 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-21 01:33:42,903 INFO L471 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) [2021-11-21 01:33:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-21 01:33:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:33:42,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:42,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:33:42,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:33:42,904 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:42,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:42,905 INFO L85 PathProgramCache]: Analyzing trace with hash 107509825, now seen corresponding path program 1 times [2021-11-21 01:33:42,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:42,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933036682] [2021-11-21 01:33:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:42,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:42,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:42,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933036682] [2021-11-21 01:33:42,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933036682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:42,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400158672] [2021-11-21 01:33:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:42,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:42,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:42,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:42,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:33:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:43,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:33:43,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:43,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:43,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400158672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:43,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802700715] [2021-11-21 01:33:43,123 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-21 01:33:43,123 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:43,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:43,133 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:43,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:43,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:33:43,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:33:43,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:43,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:43,848 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:33:43,852 INFO L388 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 234 treesize of output 233 [2021-11-21 01:33:44,696 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:44,816 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:45,009 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:45,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1802700715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:45,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:45,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2021-11-21 01:33:45,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086020517] [2021-11-21 01:33:45,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:45,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:33:45,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:45,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:33:45,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:33:45,290 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:45,610 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-21 01:33:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:45,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 01:33:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:45,614 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:33:45,614 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:33:45,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:33:45,620 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:45,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 44 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-11-21 01:33:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:33:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 01:33:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.65) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-21 01:33:45,633 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 5 [2021-11-21 01:33:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:45,633 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-21 01:33:45,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-21 01:33:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:33:45,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:45,634 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-11-21 01:33:45,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:45,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:45,850 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:45,850 INFO L85 PathProgramCache]: Analyzing trace with hash 107507393, now seen corresponding path program 1 times [2021-11-21 01:33:45,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:45,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052857326] [2021-11-21 01:33:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:45,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:45,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:45,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052857326] [2021-11-21 01:33:45,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052857326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:45,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205248709] [2021-11-21 01:33:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:45,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:45,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:45,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:45,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:33:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:45,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:33:45,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:46,004 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:46,005 INFO L388 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 18 treesize of output 19 [2021-11-21 01:33:46,009 INFO L388 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 20 treesize of output 18 [2021-11-21 01:33:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:46,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:46,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205248709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:46,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682946018] [2021-11-21 01:33:46,177 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-11-21 01:33:46,177 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:46,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:46,178 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:46,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2021-11-21 01:33:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:33:46,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:46,677 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:33:46,677 INFO L388 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 234 treesize of output 233 [2021-11-21 01:33:47,352 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:47,501 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:47,546 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:47,805 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:47,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:47,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2021-11-21 01:33:47,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004536644] [2021-11-21 01:33:47,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:47,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:33:47,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:47,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:33:47,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:33:47,807 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:47,860 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-21 01:33:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:47,861 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 [2021-11-21 01:33:47,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:47,862 INFO L225 Difference]: With dead ends: 33 [2021-11-21 01:33:47,862 INFO L226 Difference]: Without dead ends: 33 [2021-11-21 01:33:47,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:33:47,863 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:47,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2021-11-21 01:33:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-21 01:33:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-21 01:33:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-21 01:33:47,867 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 5 [2021-11-21 01:33:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:47,867 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-21 01:33:47,867 INFO L471 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) [2021-11-21 01:33:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-21 01:33:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:33:47,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:47,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:47,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:33:48,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:48,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1220434011, now seen corresponding path program 1 times [2021-11-21 01:33:48,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:48,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643717719] [2021-11-21 01:33:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:48,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:48,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:48,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643717719] [2021-11-21 01:33:48,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643717719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:48,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460192002] [2021-11-21 01:33:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:48,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:48,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:48,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:48,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:33:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:33:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:48,189 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:48,189 INFO L388 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 [2021-11-21 01:33:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:48,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:33:48,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460192002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:48,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:48,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2021-11-21 01:33:48,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038776178] [2021-11-21 01:33:48,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:48,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:33:48,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:33:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:48,240 INFO L87 Difference]: Start difference. First operand 33 states and 37 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) [2021-11-21 01:33:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:48,261 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-21 01:33:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:33:48,261 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 8 [2021-11-21 01:33:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:48,262 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:33:48,263 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:33:48,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:33:48,264 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 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 [2021-11-21 01:33:48,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:33:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 01:33:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 30 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) [2021-11-21 01:33:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-21 01:33:48,277 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2021-11-21 01:33:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:48,278 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-21 01:33:48,278 INFO L471 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) [2021-11-21 01:33:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-21 01:33:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:33:48,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:48,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:48,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:48,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:33:48,499 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:48,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:48,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1220434010, now seen corresponding path program 1 times [2021-11-21 01:33:48,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:48,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543369365] [2021-11-21 01:33:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:48,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:48,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:48,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543369365] [2021-11-21 01:33:48,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543369365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:48,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184812710] [2021-11-21 01:33:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:48,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:48,539 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:48,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:33:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:48,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:33:48,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:48,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:48,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184812710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:48,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314972684] [2021-11-21 01:33:48,638 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:33:48,638 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:48,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:48,638 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:48,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:48,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:48,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:48,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:48,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:48,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:48,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:33:48,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:48,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:33:49,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:49,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:49,141 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:33:49,142 INFO L388 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 234 treesize of output 233 [2021-11-21 01:33:49,878 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:50,009 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:50,376 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:50,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:50,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:50,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-21 01:33:50,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310565705] [2021-11-21 01:33:50,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:50,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:33:50,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:50,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:33:50,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:33:50,958 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:51,071 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2021-11-21 01:33:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:33:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:33:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:51,074 INFO L225 Difference]: With dead ends: 110 [2021-11-21 01:33:51,074 INFO L226 Difference]: Without dead ends: 110 [2021-11-21 01:33:51,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:33:51,075 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 148 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:51,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 55 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-21 01:33:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 32. [2021-11-21 01:33:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.36) 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) [2021-11-21 01:33:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-11-21 01:33:51,087 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 8 [2021-11-21 01:33:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:51,087 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-11-21 01:33:51,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-11-21 01:33:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:33:51,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:51,089 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2021-11-21 01:33:51,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 01:33:51,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:51,307 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:51,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:51,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1357941931, now seen corresponding path program 2 times [2021-11-21 01:33:51,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:51,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547629313] [2021-11-21 01:33:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:51,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:51,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:51,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547629313] [2021-11-21 01:33:51,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547629313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:51,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605403976] [2021-11-21 01:33:51,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:51,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:51,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:51,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:33:51,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:33:51,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:51,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:33:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:51,478 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:51,478 INFO L388 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 18 treesize of output 19 [2021-11-21 01:33:51,482 INFO L388 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 20 treesize of output 18 [2021-11-21 01:33:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:33:51,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:33:51,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605403976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:51,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:51,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2021-11-21 01:33:51,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698155621] [2021-11-21 01:33:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:51,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:33:51,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:33:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:33:51,677 INFO L87 Difference]: Start difference. First operand 32 states and 34 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) [2021-11-21 01:33:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:51,686 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-21 01:33:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:51,687 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 9 [2021-11-21 01:33:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:51,687 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:33:51,687 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:33:51,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:33:51,689 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:51,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2021-11-21 01:33:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:33:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 01:33:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) 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) [2021-11-21 01:33:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-21 01:33:51,692 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 9 [2021-11-21 01:33:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:51,693 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-21 01:33:51,693 INFO L471 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) [2021-11-21 01:33:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-21 01:33:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:33:51,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:51,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:51,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:51,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:51,914 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:51,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:51,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1363649592, now seen corresponding path program 2 times [2021-11-21 01:33:51,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:51,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127161209] [2021-11-21 01:33:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:51,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:52,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:52,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127161209] [2021-11-21 01:33:52,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127161209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:52,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198403681] [2021-11-21 01:33:52,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:52,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:52,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:52,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:52,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:33:52,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 01:33:52,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:52,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:33:52,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:52,079 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:33:52,080 INFO L388 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 [2021-11-21 01:33:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:33:52,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:33:52,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198403681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:52,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:52,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2021-11-21 01:33:52,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915580384] [2021-11-21 01:33:52,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:52,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:52,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:52,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:52,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:33:52,177 INFO L87 Difference]: Start difference. First operand 31 states and 33 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) [2021-11-21 01:33:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:52,219 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-11-21 01:33:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:33:52,219 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 14 [2021-11-21 01:33:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:52,220 INFO L225 Difference]: With dead ends: 45 [2021-11-21 01:33:52,220 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 01:33:52,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:33:52,221 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:52,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 01:33:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-11-21 01:33:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-21 01:33:52,226 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 14 [2021-11-21 01:33:52,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:52,226 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-21 01:33:52,226 INFO L471 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) [2021-11-21 01:33:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-21 01:33:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:33:52,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:52,227 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:52,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 01:33:52,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:33:52,442 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:52,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1363651192, now seen corresponding path program 1 times [2021-11-21 01:33:52,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:52,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29145597] [2021-11-21 01:33:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:52,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:52,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:52,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29145597] [2021-11-21 01:33:52,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29145597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:52,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616345286] [2021-11-21 01:33:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:52,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:52,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:52,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:52,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:33:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:33:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:52,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:52,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616345286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647101303] [2021-11-21 01:33:52,658 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:33:52,659 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:52,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:52,659 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:52,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:52,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,694 INFO L388 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 [2021-11-21 01:33:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:33:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:53,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:53,081 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:33:53,082 INFO L388 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 234 treesize of output 233 [2021-11-21 01:33:53,759 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:53,866 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:54,123 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:54,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1647101303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:54,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:54,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6] total 17 [2021-11-21 01:33:54,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381568616] [2021-11-21 01:33:54,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:54,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:33:54,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:54,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:33:54,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:33:54,494 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:54,765 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-21 01:33:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:33:54,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 01:33:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:54,766 INFO L225 Difference]: With dead ends: 39 [2021-11-21 01:33:54,766 INFO L226 Difference]: Without dead ends: 39 [2021-11-21 01:33:54,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:33:54,767 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:54,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2021-11-21 01:33:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-21 01:33:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-21 01:33:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-21 01:33:54,769 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2021-11-21 01:33:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:54,769 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-21 01:33:54,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-21 01:33:54,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:33:54,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:54,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:54,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:54,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:33:54,971 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:54,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:54,971 INFO L85 PathProgramCache]: Analyzing trace with hash 676536999, now seen corresponding path program 1 times [2021-11-21 01:33:54,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:54,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547866535] [2021-11-21 01:33:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:54,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:55,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:55,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547866535] [2021-11-21 01:33:55,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547866535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:55,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940494189] [2021-11-21 01:33:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:55,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:55,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:55,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:55,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:33:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:55,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:33:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:55,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:55,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940494189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:55,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585415120] [2021-11-21 01:33:55,153 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:33:55,154 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:55,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:55,154 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:55,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:55,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:55,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:55,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:55,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:55,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:55,195 INFO L388 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 [2021-11-21 01:33:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:55,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:33:55,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:55,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:55,588 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:33:55,593 INFO L388 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 234 treesize of output 233 [2021-11-21 01:33:56,092 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:56,176 INFO L388 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 25 treesize of output 21 [2021-11-21 01:33:56,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:56,471 INFO L354 Elim1Store]: treesize reduction 68, result has 22.7 percent of original size [2021-11-21 01:33:56,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 51 [2021-11-21 01:33:56,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:56,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:56,924 INFO L354 Elim1Store]: treesize reduction 307, result has 19.6 percent of original size [2021-11-21 01:33:56,925 INFO L388 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 165 treesize of output 160 [2021-11-21 01:33:57,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:57,392 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:33:57,392 INFO L388 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 [2021-11-21 01:33:57,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:57,601 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:33:57,602 INFO L388 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 [2021-11-21 01:33:57,798 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:58,258 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:58,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:58,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-21 01:33:58,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273874666] [2021-11-21 01:33:58,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:58,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:33:58,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:58,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:33:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:33:58,260 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2021-11-21 01:33:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:58,504 INFO L93 Difference]: Finished difference Result 240 states and 252 transitions. [2021-11-21 01:33:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:33:58,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) Word has length 15 [2021-11-21 01:33:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:58,506 INFO L225 Difference]: With dead ends: 240 [2021-11-21 01:33:58,506 INFO L226 Difference]: Without dead ends: 240 [2021-11-21 01:33:58,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:33:58,507 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 430 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:58,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 109 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:33:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-21 01:33:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 51. [2021-11-21 01:33:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-11-21 01:33:58,514 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 15 [2021-11-21 01:33:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:58,514 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-11-21 01:33:58,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2021-11-21 01:33:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-11-21 01:33:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 01:33:58,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:58,515 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:58,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:58,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:58,716 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:33:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:58,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1762948963, now seen corresponding path program 2 times [2021-11-21 01:33:58,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:58,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721786805] [2021-11-21 01:33:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:58,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:58,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:58,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721786805] [2021-11-21 01:33:58,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721786805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:58,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343485164] [2021-11-21 01:33:58,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:58,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:58,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:58,869 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:58,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:33:58,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:33:58,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:33:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 01:33:59,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:59,118 INFO L388 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 27 treesize of output 23 [2021-11-21 01:33:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-21 01:33:59,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343485164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1481919604] [2021-11-21 01:33:59,180 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:33:59,180 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:59,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:59,180 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:59,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:59,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:59,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:59,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:59,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:59,223 INFO L388 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 [2021-11-21 01:33:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:59,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:33:59,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:59,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:59,565 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:33:59,566 INFO L388 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 244 treesize of output 232 [2021-11-21 01:33:59,963 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:00,074 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:00,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:00,355 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-21 01:34:00,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 61 [2021-11-21 01:34:00,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:00,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:00,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:00,841 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-21 01:34:00,842 INFO L388 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 173 treesize of output 139 [2021-11-21 01:34:01,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:01,133 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:34:01,133 INFO L388 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 [2021-11-21 01:34:01,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:01,314 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:34:01,314 INFO L388 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 [2021-11-21 01:34:01,504 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:02,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:02,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:02,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 20 [2021-11-21 01:34:02,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889429718] [2021-11-21 01:34:02,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:02,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:34:02,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:02,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:34:02,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:34:02,089 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-11-21 01:34:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:03,050 INFO L93 Difference]: Finished difference Result 290 states and 306 transitions. [2021-11-21 01:34:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 01:34:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) Word has length 27 [2021-11-21 01:34:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:03,053 INFO L225 Difference]: With dead ends: 290 [2021-11-21 01:34:03,053 INFO L226 Difference]: Without dead ends: 290 [2021-11-21 01:34:03,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=722, Invalid=1828, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 01:34:03,055 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1023 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:03,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 129 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:34:03,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-21 01:34:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 80. [2021-11-21 01:34:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2021-11-21 01:34:03,063 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 27 [2021-11-21 01:34:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:03,063 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2021-11-21 01:34:03,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-11-21 01:34:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2021-11-21 01:34:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 01:34:03,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:03,065 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:03,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:03,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:03,279 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:34:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash -920306569, now seen corresponding path program 1 times [2021-11-21 01:34:03,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:03,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494813744] [2021-11-21 01:34:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:03,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:03,438 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494813744] [2021-11-21 01:34:03,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494813744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981301128] [2021-11-21 01:34:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:03,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:03,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:03,439 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:03,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:34:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:03,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:34:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:03,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:03,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981301128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:03,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813179009] [2021-11-21 01:34:03,835 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:34:03,835 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:03,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:03,835 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:03,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:03,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:34:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:04,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:34:04,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:04,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:04,196 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:34:04,196 INFO L388 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 234 treesize of output 233 [2021-11-21 01:34:04,924 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:05,051 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:05,393 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:34:05,393 INFO L388 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 83 treesize of output 82 [2021-11-21 01:34:05,586 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:06,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:06,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:06,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-11-21 01:34:06,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513439617] [2021-11-21 01:34:06,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:06,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 01:34:06,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:06,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 01:34:06,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=668, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:34:06,147 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:06,666 INFO L93 Difference]: Finished difference Result 563 states and 597 transitions. [2021-11-21 01:34:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 01:34:06,666 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-21 01:34:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:06,670 INFO L225 Difference]: With dead ends: 563 [2021-11-21 01:34:06,670 INFO L226 Difference]: Without dead ends: 563 [2021-11-21 01:34:06,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=522, Invalid=668, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:34:06,672 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1009 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:06,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 235 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:34:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-21 01:34:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 106. [2021-11-21 01:34:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.23) internal successors, (123), 105 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-11-21 01:34:06,702 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 31 [2021-11-21 01:34:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:06,704 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-11-21 01:34:06,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-11-21 01:34:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 01:34:06,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:06,708 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:06,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:06,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:34:06,923 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:34:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1561158905, now seen corresponding path program 2 times [2021-11-21 01:34:06,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:06,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625068499] [2021-11-21 01:34:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:06,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:07,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625068499] [2021-11-21 01:34:07,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625068499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:07,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735038481] [2021-11-21 01:34:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:34:07,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:07,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:07,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:34:07,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 01:34:07,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:07,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:34:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-21 01:34:07,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:34:07,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735038481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:07,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:34:07,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [26] total 28 [2021-11-21 01:34:07,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242292471] [2021-11-21 01:34:07,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:07,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:34:07,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:34:07,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:34:07,789 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:07,809 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2021-11-21 01:34:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:34:07,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-21 01:34:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:07,811 INFO L225 Difference]: With dead ends: 105 [2021-11-21 01:34:07,811 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 01:34:07,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:34:07,812 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:07,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-11-21 01:34:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 01:34:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-21 01:34:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.183673469387755) internal successors, (116), 102 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2021-11-21 01:34:07,817 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 57 [2021-11-21 01:34:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:07,818 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2021-11-21 01:34:07,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2021-11-21 01:34:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 01:34:07,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:07,820 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 01:34:07,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:08,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 01:34:08,035 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:34:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:08,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1624443720, now seen corresponding path program 1 times [2021-11-21 01:34:08,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:08,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629590999] [2021-11-21 01:34:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:08,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:34:08,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:08,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629590999] [2021-11-21 01:34:08,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629590999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:08,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286268959] [2021-11-21 01:34:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:08,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:08,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:08,393 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:08,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:34:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:08,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:34:08,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:34:08,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:34:09,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286268959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1353530958] [2021-11-21 01:34:09,428 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:34:09,429 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:09,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:09,429 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:09,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:09,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:09,463 INFO L388 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 [2021-11-21 01:34:09,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:34:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:09,780 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:34:09,781 INFO L388 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 244 treesize of output 232 [2021-11-21 01:34:10,205 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:10,297 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:10,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:10,578 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-21 01:34:10,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 61 [2021-11-21 01:34:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:10,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:10,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:10,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:11,042 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-21 01:34:11,042 INFO L388 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 173 treesize of output 139 [2021-11-21 01:34:11,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:11,330 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:34:11,331 INFO L388 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 [2021-11-21 01:34:11,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:11,567 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:34:11,568 INFO L388 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 [2021-11-21 01:34:11,638 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:12,258 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:12,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:12,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2021-11-21 01:34:12,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924131692] [2021-11-21 01:34:12,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:12,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-21 01:34:12,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:12,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-21 01:34:12,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1396, Invalid=2026, Unknown=0, NotChecked=0, Total=3422 [2021-11-21 01:34:12,262 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:13,843 INFO L93 Difference]: Finished difference Result 982 states and 1039 transitions. [2021-11-21 01:34:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-21 01:34:13,844 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 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 58 [2021-11-21 01:34:13,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:13,849 INFO L225 Difference]: With dead ends: 982 [2021-11-21 01:34:13,849 INFO L226 Difference]: Without dead ends: 982 [2021-11-21 01:34:13,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1396, Invalid=2026, Unknown=0, NotChecked=0, Total=3422 [2021-11-21 01:34:13,851 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2353 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2353 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:13,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2353 Valid, 307 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:34:13,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-21 01:34:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 155. [2021-11-21 01:34:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.12) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2021-11-21 01:34:13,862 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 58 [2021-11-21 01:34:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:13,862 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2021-11-21 01:34:13,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2021-11-21 01:34:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-21 01:34:13,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:13,867 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 01:34:13,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-21 01:34:14,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:14,083 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:34:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:14,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1751691188, now seen corresponding path program 2 times [2021-11-21 01:34:14,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:14,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563829460] [2021-11-21 01:34:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:14,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:34:15,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563829460] [2021-11-21 01:34:15,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563829460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52117948] [2021-11-21 01:34:15,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:34:15,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:15,315 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:15,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:34:15,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 01:34:15,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:34:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:15,378 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:34:15,378 INFO L388 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 [2021-11-21 01:34:15,384 INFO L388 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 [2021-11-21 01:34:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2021-11-21 01:34:16,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2021-11-21 01:34:18,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52117948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:18,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378866923] [2021-11-21 01:34:18,518 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:34:18,518 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:18,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:18,519 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:18,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:18,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:34:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:34:18,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:18,867 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:34:18,868 INFO L388 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 234 treesize of output 233 [2021-11-21 01:34:19,580 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:19,689 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:20,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:20,027 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-21 01:34:20,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 61 [2021-11-21 01:34:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:20,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:20,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:20,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:20,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:20,471 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-21 01:34:20,472 INFO L388 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 173 treesize of output 139 [2021-11-21 01:34:20,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:20,779 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:34:20,780 INFO L388 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 [2021-11-21 01:34:21,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:21,012 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:34:21,013 INFO L388 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 [2021-11-21 01:34:21,055 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:21,748 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:21,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:21,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 2, 2] total 56 [2021-11-21 01:34:21,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887424676] [2021-11-21 01:34:21,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:21,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-21 01:34:21,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:21,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-21 01:34:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1406, Invalid=2500, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:34:21,751 INFO L87 Difference]: Start difference. First operand 155 states and 168 transitions. Second operand has 57 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 56 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:28,353 INFO L93 Difference]: Finished difference Result 806 states and 862 transitions. [2021-11-21 01:34:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-21 01:34:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 56 states have internal predecessors, (131), 0 states have call successors, (0), 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 110 [2021-11-21 01:34:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:28,357 INFO L225 Difference]: With dead ends: 806 [2021-11-21 01:34:28,358 INFO L226 Difference]: Without dead ends: 806 [2021-11-21 01:34:28,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 319 SyntacticMatches, 52 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3270 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4370, Invalid=8740, Unknown=0, NotChecked=0, Total=13110 [2021-11-21 01:34:28,363 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3691 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3691 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:28,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3691 Valid, 313 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 484 Invalid, 0 Unknown, 31 Unchecked, 1.0s Time] [2021-11-21 01:34:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-21 01:34:28,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 633. [2021-11-21 01:34:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 630 states have (on average 1.16984126984127) internal successors, (737), 632 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 737 transitions. [2021-11-21 01:34:28,380 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 737 transitions. Word has length 110 [2021-11-21 01:34:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:28,381 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 737 transitions. [2021-11-21 01:34:28,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 56 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 737 transitions. [2021-11-21 01:34:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-21 01:34:28,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:28,383 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:28,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:28,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:34:28,607 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:34:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1578742450, now seen corresponding path program 1 times [2021-11-21 01:34:28,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:28,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308850576] [2021-11-21 01:34:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:28,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:29,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:29,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308850576] [2021-11-21 01:34:29,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308850576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:29,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132403607] [2021-11-21 01:34:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:29,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:29,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:29,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:29,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:34:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:30,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-21 01:34:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:30,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:33,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132403607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:33,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702781178] [2021-11-21 01:34:33,232 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-21 01:34:33,233 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:33,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:33,233 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:33,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:33,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2021-11-21 01:34:33,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:34:33,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,573 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:34:33,574 INFO L388 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 244 treesize of output 232 [2021-11-21 01:34:33,946 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:34,043 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:34,329 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:34,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [702781178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:34,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:34,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [54, 54, 54] total 114 [2021-11-21 01:34:34,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580504957] [2021-11-21 01:34:34,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:34,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:34:34,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:34,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:34:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6780, Unknown=0, NotChecked=0, Total=13110 [2021-11-21 01:34:34,827 INFO L87 Difference]: Start difference. First operand 633 states and 737 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:35,109 INFO L93 Difference]: Finished difference Result 636 states and 739 transitions. [2021-11-21 01:34:35,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:34:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-21 01:34:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:35,113 INFO L225 Difference]: With dead ends: 636 [2021-11-21 01:34:35,114 INFO L226 Difference]: Without dead ends: 633 [2021-11-21 01:34:35,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6334, Invalid=7006, Unknown=0, NotChecked=0, Total=13340 [2021-11-21 01:34:35,119 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:35,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2021-11-21 01:34:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-21 01:34:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2021-11-21 01:34:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 630 states have (on average 1.1682539682539683) internal successors, (736), 632 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 736 transitions. [2021-11-21 01:34:35,135 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 736 transitions. Word has length 115 [2021-11-21 01:34:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:35,136 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 736 transitions. [2021-11-21 01:34:35,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 736 transitions. [2021-11-21 01:34:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-21 01:34:35,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:35,142 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:35,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:35,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:34:35,351 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:34:35,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:35,351 INFO L85 PathProgramCache]: Analyzing trace with hash -502615914, now seen corresponding path program 1 times [2021-11-21 01:34:35,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:35,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588081502] [2021-11-21 01:34:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:35,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:34:36,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:36,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588081502] [2021-11-21 01:34:36,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588081502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:36,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698156280] [2021-11-21 01:34:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:36,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:36,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:36,569 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:36,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 01:34:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-21 01:34:36,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:34:36,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:34:39,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698156280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60744043] [2021-11-21 01:34:39,935 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:34:39,935 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:39,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:39,936 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:39,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2021-11-21 01:34:40,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:34:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:40,329 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:34:40,330 INFO L388 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 234 treesize of output 233 [2021-11-21 01:34:41,001 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:41,109 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:41,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:41,415 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-21 01:34:41,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 61 [2021-11-21 01:34:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:41,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:41,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:41,875 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-21 01:34:41,875 INFO L388 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 173 treesize of output 139 [2021-11-21 01:34:42,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:42,199 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:34:42,199 INFO L388 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 [2021-11-21 01:34:42,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:42,376 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:34:42,377 INFO L388 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 [2021-11-21 01:34:42,771 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:43,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:43,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:43,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 108 [2021-11-21 01:34:43,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063457841] [2021-11-21 01:34:43,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:43,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-21 01:34:43,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:43,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-21 01:34:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6571, Invalid=7709, Unknown=0, NotChecked=0, Total=14280 [2021-11-21 01:34:43,628 INFO L87 Difference]: Start difference. First operand 633 states and 736 transitions. Second operand has 109 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 108 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) [2021-11-21 01:34:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:51,558 INFO L93 Difference]: Finished difference Result 1714 states and 1821 transitions. [2021-11-21 01:34:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-21 01:34:51,559 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 108 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 119 [2021-11-21 01:34:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:51,567 INFO L225 Difference]: With dead ends: 1714 [2021-11-21 01:34:51,567 INFO L226 Difference]: Without dead ends: 1714 [2021-11-21 01:34:51,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6571, Invalid=7709, Unknown=0, NotChecked=0, Total=14280 [2021-11-21 01:34:51,568 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4735 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 1132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4735 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1132 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:51,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4735 Valid, 643 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1132 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:34:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-11-21 01:34:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 741. [2021-11-21 01:34:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 738 states have (on average 1.1436314363143631) internal successors, (844), 740 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 844 transitions. [2021-11-21 01:34:51,610 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 844 transitions. Word has length 119 [2021-11-21 01:34:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:51,611 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 844 transitions. [2021-11-21 01:34:51,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 108 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) [2021-11-21 01:34:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 844 transitions. [2021-11-21 01:34:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-21 01:34:51,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:51,614 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:51,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:51,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:51,831 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:34:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash 977524530, now seen corresponding path program 2 times [2021-11-21 01:34:51,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:51,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123039120] [2021-11-21 01:34:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:51,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11238 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:34:56,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123039120] [2021-11-21 01:34:56,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123039120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:56,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024977244] [2021-11-21 01:34:56,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:34:56,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:56,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:56,059 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:56,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:34:56,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:34:56,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:56,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:34:56,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:56,137 INFO L388 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 [2021-11-21 01:34:57,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 01:34:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11238 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11236 trivial. 0 not checked. [2021-11-21 01:34:57,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:58,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:58,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2021-11-21 01:34:58,199 INFO L354 Elim1Store]: treesize reduction 22, result has 33.3 percent of original size [2021-11-21 01:34:58,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 68 [2021-11-21 01:34:58,241 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:34:58,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 39 [2021-11-21 01:34:58,246 INFO L388 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 62 treesize of output 58 [2021-11-21 01:34:58,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-21 01:34:58,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,310 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-21 01:34:58,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 36 [2021-11-21 01:34:58,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-21 01:34:58,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11238 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11236 trivial. 0 not checked. [2021-11-21 01:34:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024977244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:58,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063807404] [2021-11-21 01:34:58,722 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:34:58,723 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:58,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:58,723 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:58,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:58,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-21 01:34:58,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:34:59,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:59,105 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:34:59,105 INFO L388 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 244 treesize of output 232 [2021-11-21 01:34:59,504 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:59,619 INFO L388 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 25 treesize of output 21 [2021-11-21 01:34:59,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:59,893 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-21 01:34:59,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 61 [2021-11-21 01:35:00,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:00,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:00,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:00,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:00,340 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-21 01:35:00,340 INFO L388 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 173 treesize of output 139 [2021-11-21 01:35:00,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:00,700 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:35:00,701 INFO L388 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 [2021-11-21 01:35:00,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:00,938 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:35:00,939 INFO L388 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 [2021-11-21 01:35:01,506 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:02,761 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:02,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:35:02,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 8, 8] total 121 [2021-11-21 01:35:02,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982671028] [2021-11-21 01:35:02,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:02,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-21 01:35:02,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-21 01:35:02,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7048, Invalid=10244, Unknown=0, NotChecked=0, Total=17292 [2021-11-21 01:35:02,766 INFO L87 Difference]: Start difference. First operand 741 states and 844 transitions. Second operand has 121 states, 121 states have (on average 2.12396694214876) internal successors, (257), 121 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:22,597 INFO L93 Difference]: Finished difference Result 1128 states and 1286 transitions. [2021-11-21 01:35:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-11-21 01:35:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.12396694214876) internal successors, (257), 121 states have internal predecessors, (257), 0 states have call successors, (0), 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 227 [2021-11-21 01:35:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:22,602 INFO L225 Difference]: With dead ends: 1128 [2021-11-21 01:35:22,602 INFO L226 Difference]: Without dead ends: 1128 [2021-11-21 01:35:22,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 656 SyntacticMatches, 1 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29131 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=36905, Invalid=82465, Unknown=0, NotChecked=0, Total=119370 [2021-11-21 01:35:22,609 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2679 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 1798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2679 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1798 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:22,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2679 Valid, 290 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1798 Valid, 759 Invalid, 0 Unknown, 1 Unchecked, 1.4s Time] [2021-11-21 01:35:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-11-21 01:35:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 743. [2021-11-21 01:35:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 740 states have (on average 1.1418918918918919) internal successors, (845), 742 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 845 transitions. [2021-11-21 01:35:22,639 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 845 transitions. Word has length 227 [2021-11-21 01:35:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:22,640 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 845 transitions. [2021-11-21 01:35:22,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.12396694214876) internal successors, (257), 121 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 845 transitions. [2021-11-21 01:35:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-21 01:35:22,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:22,644 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:22,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:22,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:22,859 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:35:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash 875987936, now seen corresponding path program 1 times [2021-11-21 01:35:22,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:22,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792985968] [2021-11-21 01:35:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:22,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11456 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:35:27,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:27,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792985968] [2021-11-21 01:35:27,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792985968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:35:27,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109046355] [2021-11-21 01:35:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:27,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:27,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:27,198 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:27,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 01:35:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:27,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-21 01:35:27,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11456 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:35:27,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11456 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:35:39,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109046355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:39,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758712617] [2021-11-21 01:35:39,606 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:35:39,606 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:39,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:39,607 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:39,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:39,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:39,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:39,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:39,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2021-11-21 01:35:39,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:35:39,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:39,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:39,943 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:35:39,943 INFO L388 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 234 treesize of output 233 [2021-11-21 01:35:40,534 INFO L388 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 25 treesize of output 21 [2021-11-21 01:35:40,640 INFO L388 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 25 treesize of output 21 [2021-11-21 01:35:40,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:40,952 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-21 01:35:40,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 61 [2021-11-21 01:35:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:41,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:41,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:41,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:41,382 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-21 01:35:41,382 INFO L388 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 173 treesize of output 139 [2021-11-21 01:35:41,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:41,785 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:35:41,785 INFO L388 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 [2021-11-21 01:35:41,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:41,940 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:35:41,940 INFO L388 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 [2021-11-21 01:35:43,931 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:45,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:45,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:35:45,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109, 109] total 218 [2021-11-21 01:35:45,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861205967] [2021-11-21 01:35:45,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:45,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 219 states [2021-11-21 01:35:45,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2021-11-21 01:35:45,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23912, Invalid=28758, Unknown=0, NotChecked=0, Total=52670 [2021-11-21 01:35:45,652 INFO L87 Difference]: Start difference. First operand 743 states and 845 transitions. Second operand has 219 states, 219 states have (on average 2.050228310502283) internal successors, (449), 218 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:09,123 INFO L93 Difference]: Finished difference Result 3582 states and 3799 transitions. [2021-11-21 01:37:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-11-21 01:37:09,124 INFO L78 Accepts]: Start accepts. Automaton has has 219 states, 219 states have (on average 2.050228310502283) internal successors, (449), 218 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-11-21 01:37:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:09,138 INFO L225 Difference]: With dead ends: 3582 [2021-11-21 01:37:09,138 INFO L226 Difference]: Without dead ends: 3582 [2021-11-21 01:37:09,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=23912, Invalid=28758, Unknown=0, NotChecked=0, Total=52670 [2021-11-21 01:37:09,140 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12759 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 3406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12759 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 5705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3406 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:09,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12759 Valid, 1309 Invalid, 5705 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3406 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-21 01:37:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2021-11-21 01:37:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 961. [2021-11-21 01:37:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 958 states have (on average 1.1096033402922756) internal successors, (1063), 960 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1063 transitions. [2021-11-21 01:37:09,172 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1063 transitions. Word has length 235 [2021-11-21 01:37:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:09,172 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1063 transitions. [2021-11-21 01:37:09,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 219 states, 219 states have (on average 2.050228310502283) internal successors, (449), 218 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1063 transitions. [2021-11-21 01:37:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-11-21 01:37:09,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:09,182 INFO L514 BasicCegarLoop]: trace histogram [216, 216, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:37:09,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:09,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:09,395 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:37:09,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:09,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1046123810, now seen corresponding path program 2 times [2021-11-21 01:37:09,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:09,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091740650] [2021-11-21 01:37:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:09,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 46663 backedges. 0 proven. 46656 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:37:25,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091740650] [2021-11-21 01:37:25,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091740650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:37:25,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89207555] [2021-11-21 01:37:25,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:37:25,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:25,603 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:25,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 01:37:25,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:37:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:37:25,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:37:25,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:26,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-21 01:37:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 46663 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 46656 trivial. 0 not checked. [2021-11-21 01:37:26,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:26,988 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-21 01:37:26,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2021-11-21 01:37:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46663 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 46656 trivial. 0 not checked. [2021-11-21 01:37:27,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89207555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:27,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1580369664] [2021-11-21 01:37:27,456 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:37:27,456 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:37:27,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:37:27,457 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:37:27,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:37:27,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:27,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:27,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:27,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:27,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:27,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2021-11-21 01:37:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:27,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:37:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:27,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:27,806 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:37:27,807 INFO L388 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 234 treesize of output 233 [2021-11-21 01:37:28,459 INFO L388 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 25 treesize of output 21 [2021-11-21 01:37:28,542 INFO L388 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 25 treesize of output 21 [2021-11-21 01:37:28,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:28,836 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-11-21 01:37:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 61 [2021-11-21 01:37:29,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:29,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:29,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:29,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:29,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:29,346 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-21 01:37:29,346 INFO L388 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 173 treesize of output 139 [2021-11-21 01:37:29,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:29,683 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:37:29,684 INFO L388 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 [2021-11-21 01:37:29,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:37:29,959 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:37:29,959 INFO L388 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 [2021-11-21 01:37:31,860 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:37:34,678 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:37:34,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:37:34,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [218, 9, 9] total 228 [2021-11-21 01:37:34,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415251356] [2021-11-21 01:37:34,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:37:34,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2021-11-21 01:37:34,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:34,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2021-11-21 01:37:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24588, Invalid=32294, Unknown=0, NotChecked=0, Total=56882 [2021-11-21 01:37:34,691 INFO L87 Difference]: Start difference. First operand 961 states and 1063 transitions. Second operand has 228 states, 228 states have (on average 2.0921052631578947) internal successors, (477), 228 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:39:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:02,531 INFO L93 Difference]: Finished difference Result 3608 states and 3825 transitions. [2021-11-21 01:39:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-11-21 01:39:02,532 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 2.0921052631578947) internal successors, (477), 228 states have internal predecessors, (477), 0 states have call successors, (0), 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 453 [2021-11-21 01:39:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:02,544 INFO L225 Difference]: With dead ends: 3608 [2021-11-21 01:39:02,544 INFO L226 Difference]: Without dead ends: 3599 [2021-11-21 01:39:02,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1337 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5508 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=25033, Invalid=32807, Unknown=0, NotChecked=0, Total=57840 [2021-11-21 01:39:02,547 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13993 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 3527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13993 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 5998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3527 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:02,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13993 Valid, 1355 Invalid, 5998 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3527 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:39:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2021-11-21 01:39:02,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 963. [2021-11-21 01:39:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 960 states have (on average 1.1083333333333334) internal successors, (1064), 962 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:39:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1064 transitions. [2021-11-21 01:39:02,576 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1064 transitions. Word has length 453 [2021-11-21 01:39:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:02,577 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1064 transitions. [2021-11-21 01:39:02,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 2.0921052631578947) internal successors, (477), 228 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:39:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1064 transitions. [2021-11-21 01:39:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-11-21 01:39:02,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:02,588 INFO L514 BasicCegarLoop]: trace histogram [217, 217, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:39:02,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:02,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:02,815 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-21 01:39:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:02,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1879106804, now seen corresponding path program 3 times [2021-11-21 01:39:02,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:02,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36624558] [2021-11-21 01:39:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:02,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 47102 backedges. 0 proven. 47089 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:39:19,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36624558] [2021-11-21 01:39:19,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36624558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:19,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482036058] [2021-11-21 01:39:19,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:39:19,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:19,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:19,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:19,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdad3740-f04a-46ad-9084-a7c6c06ed3fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process