./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/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_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 781939b227b3ba0a20ad2d0323c2d13ae338349fb5c0bf292cccf74fd05cfb42 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:45:36,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:45:36,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:45:36,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:45:36,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:45:36,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:45:36,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:45:36,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:45:36,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:45:36,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:45:36,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:45:36,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:45:36,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:45:36,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:45:36,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:45:36,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:45:36,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:45:36,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:45:36,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:45:36,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:45:36,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:45:36,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:45:36,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:45:36,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:45:36,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:45:36,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:45:36,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:45:36,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:45:36,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:45:36,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:45:36,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:45:36,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:45:36,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:45:36,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:45:36,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:45:36,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:45:36,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:45:36,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:45:36,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:45:36,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:45:36,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:45:36,976 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:45:37,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:45:37,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:45:37,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:45:37,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:45:37,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:45:37,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:45:37,019 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:45:37,020 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:45:37,020 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:45:37,020 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:45:37,022 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:45:37,022 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:45:37,022 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:45:37,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:45:37,023 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:45:37,023 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:45:37,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:45:37,024 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:45:37,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:45:37,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:45:37,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:45:37,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:45:37,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:45:37,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:45:37,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:45:37,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:45:37,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:45:37,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:45:37,030 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:45:37,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:45:37,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:45:37,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:45:37,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:45:37,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:45:37,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:45:37,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:45:37,032 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:45:37,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:45:37,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:45:37,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:45:37,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:45:37,034 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_333c49d9-6260-4a89-a3b0-6ee825159858/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781939b227b3ba0a20ad2d0323c2d13ae338349fb5c0bf292cccf74fd05cfb42 [2021-11-20 23:45:37,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:45:37,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:45:37,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:45:37,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:45:37,468 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:45:37,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c [2021-11-20 23:45:37,572 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data/b443bdcf5/ba581666b1e14175bbb8f7abbb513f8e/FLAG57a0f70ee [2021-11-20 23:45:38,324 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:45:38,324 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c [2021-11-20 23:45:38,371 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data/b443bdcf5/ba581666b1e14175bbb8f7abbb513f8e/FLAG57a0f70ee [2021-11-20 23:45:38,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data/b443bdcf5/ba581666b1e14175bbb8f7abbb513f8e [2021-11-20 23:45:38,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:45:38,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:45:38,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:45:38,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:45:38,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:45:38,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:38" (1/1) ... [2021-11-20 23:45:38,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c63b902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:38, skipping insertion in model container [2021-11-20 23:45:38,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:38" (1/1) ... [2021-11-20 23:45:38,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:45:38,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:45:39,108 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_333c49d9-6260-4a89-a3b0-6ee825159858/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c[65520,65533] [2021-11-20 23:45:39,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:45:39,141 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:45:39,291 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_333c49d9-6260-4a89-a3b0-6ee825159858/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c[65520,65533] [2021-11-20 23:45:39,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:45:39,328 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:45:39,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39 WrapperNode [2021-11-20 23:45:39,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:45:39,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:45:39,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:45:39,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:45:39,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,504 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 724 [2021-11-20 23:45:39,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:45:39,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:45:39,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:45:39,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:45:39,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:45:39,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:45:39,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:45:39,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:45:39,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (1/1) ... [2021-11-20 23:45:39,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:45:39,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:45:39,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:45:39,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:45:39,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:45:39,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:45:39,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:45:39,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:45:39,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:45:39,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:45:39,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:45:39,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:45:39,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:45:40,027 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:45:40,029 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:45:40,074 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:45:43,249 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-20 23:45:43,249 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-20 23:45:43,249 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:45:43,824 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:45:43,824 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:45:43,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:43 BoogieIcfgContainer [2021-11-20 23:45:43,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:45:43,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:45:43,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:45:43,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:45:43,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:45:38" (1/3) ... [2021-11-20 23:45:43,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e90d1b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:43, skipping insertion in model container [2021-11-20 23:45:43,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:39" (2/3) ... [2021-11-20 23:45:43,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e90d1b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:43, skipping insertion in model container [2021-11-20 23:45:43,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:43" (3/3) ... [2021-11-20 23:45:43,839 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.01.i.cil-2.c [2021-11-20 23:45:43,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:45:43,846 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:45:43,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:45:43,989 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:45:43,990 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:45:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.7411764705882353) internal successors, (148), 86 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:45:44,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:44,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:44,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1254122491, now seen corresponding path program 1 times [2021-11-20 23:45:44,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:44,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709698760] [2021-11-20 23:45:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:44,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:44,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:44,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709698760] [2021-11-20 23:45:44,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709698760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:44,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:44,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:45:44,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377772727] [2021-11-20 23:45:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:44,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:45:44,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:45:44,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:45:44,691 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 1.7411764705882353) internal successors, (148), 86 states have internal predecessors, (148), 0 states have call successors, (0), 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 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:46,727 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:47,853 INFO L93 Difference]: Finished difference Result 175 states and 299 transitions. [2021-11-20 23:45:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:45:47,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 23:45:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:47,870 INFO L225 Difference]: With dead ends: 175 [2021-11-20 23:45:47,871 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 23:45:47,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:47,894 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 1 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:47,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 332 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 23:45:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 23:45:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-20 23:45:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.4588235294117646) internal successors, (124), 85 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 124 transitions. [2021-11-20 23:45:47,968 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 124 transitions. Word has length 19 [2021-11-20 23:45:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:47,969 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 124 transitions. [2021-11-20 23:45:47,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 124 transitions. [2021-11-20 23:45:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:45:47,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:47,971 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:47,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:45:47,972 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1163956164, now seen corresponding path program 1 times [2021-11-20 23:45:47,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:47,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127288922] [2021-11-20 23:45:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:47,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:45:48,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:48,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127288922] [2021-11-20 23:45:48,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127288922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:48,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:48,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:45:48,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190696839] [2021-11-20 23:45:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:48,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:45:48,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:48,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:45:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:45:48,287 INFO L87 Difference]: Start difference. First operand 86 states and 124 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:50,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:50,837 INFO L93 Difference]: Finished difference Result 168 states and 244 transitions. [2021-11-20 23:45:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:45:50,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-20 23:45:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:50,840 INFO L225 Difference]: With dead ends: 168 [2021-11-20 23:45:50,840 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 23:45:50,841 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 [2021-11-20 23:45:50,842 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 87 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:50,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 204 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:45:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 23:45:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-11-20 23:45:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4634146341463414) internal successors, (240), 164 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 240 transitions. [2021-11-20 23:45:50,872 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 240 transitions. Word has length 30 [2021-11-20 23:45:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:50,872 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 240 transitions. [2021-11-20 23:45:50,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 240 transitions. [2021-11-20 23:45:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 23:45:50,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:50,876 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:50,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:45:50,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:50,877 INFO L85 PathProgramCache]: Analyzing trace with hash -154620095, now seen corresponding path program 1 times [2021-11-20 23:45:50,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:50,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507047159] [2021-11-20 23:45:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:50,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:45:51,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:51,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507047159] [2021-11-20 23:45:51,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507047159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:51,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:51,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:45:51,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011681680] [2021-11-20 23:45:51,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:51,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:45:51,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:45:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:45:51,068 INFO L87 Difference]: Start difference. First operand 165 states and 240 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:53,085 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:54,016 INFO L93 Difference]: Finished difference Result 275 states and 400 transitions. [2021-11-20 23:45:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:45:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-20 23:45:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:54,019 INFO L225 Difference]: With dead ends: 275 [2021-11-20 23:45:54,020 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 23:45:54,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:54,023 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 18 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:54,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 301 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 23:45:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 23:45:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2021-11-20 23:45:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4777777777777779) internal successors, (266), 180 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 266 transitions. [2021-11-20 23:45:54,048 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 266 transitions. Word has length 42 [2021-11-20 23:45:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:54,048 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 266 transitions. [2021-11-20 23:45:54,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 266 transitions. [2021-11-20 23:45:54,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 23:45:54,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:54,053 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:54,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:45:54,054 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash -517972216, now seen corresponding path program 2 times [2021-11-20 23:45:54,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:54,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388903503] [2021-11-20 23:45:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:54,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:45:54,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:54,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388903503] [2021-11-20 23:45:54,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388903503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:54,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:54,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:45:54,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770022747] [2021-11-20 23:45:54,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:54,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:45:54,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:54,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:45:54,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:45:54,196 INFO L87 Difference]: Start difference. First operand 181 states and 266 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:56,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:56,870 INFO L93 Difference]: Finished difference Result 291 states and 425 transitions. [2021-11-20 23:45:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:45:56,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-20 23:45:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:56,874 INFO L225 Difference]: With dead ends: 291 [2021-11-20 23:45:56,874 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 23:45:56,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:56,877 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 25 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:56,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 305 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 23:45:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 23:45:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2021-11-20 23:45:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4722222222222223) internal successors, (265), 180 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2021-11-20 23:45:56,894 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 53 [2021-11-20 23:45:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:56,895 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2021-11-20 23:45:56,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2021-11-20 23:45:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 23:45:56,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:56,899 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:56,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:45:56,899 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2014476994, now seen corresponding path program 1 times [2021-11-20 23:45:56,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:56,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702055421] [2021-11-20 23:45:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:56,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:45:57,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:57,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702055421] [2021-11-20 23:45:57,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702055421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:57,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:57,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:45:57,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333394501] [2021-11-20 23:45:57,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:57,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:45:57,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:45:57,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:45:57,013 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:59,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:59,717 INFO L93 Difference]: Finished difference Result 291 states and 423 transitions. [2021-11-20 23:45:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:45:59,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-20 23:45:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:59,729 INFO L225 Difference]: With dead ends: 291 [2021-11-20 23:45:59,729 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 23:45:59,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:59,731 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 23 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:59,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 301 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:45:59,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 23:45:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2021-11-20 23:45:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4666666666666666) internal successors, (264), 180 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 264 transitions. [2021-11-20 23:45:59,748 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 264 transitions. Word has length 54 [2021-11-20 23:45:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:59,748 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 264 transitions. [2021-11-20 23:45:59,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 264 transitions. [2021-11-20 23:45:59,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 23:45:59,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:59,752 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:59,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:45:59,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:59,754 INFO L85 PathProgramCache]: Analyzing trace with hash 595805975, now seen corresponding path program 1 times [2021-11-20 23:45:59,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:59,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725220935] [2021-11-20 23:45:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:59,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:45:59,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725220935] [2021-11-20 23:45:59,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725220935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:59,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:59,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:45:59,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923641551] [2021-11-20 23:45:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:59,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:45:59,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:45:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:45:59,863 INFO L87 Difference]: Start difference. First operand 181 states and 264 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:01,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:02,645 INFO L93 Difference]: Finished difference Result 291 states and 421 transitions. [2021-11-20 23:46:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-20 23:46:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:02,648 INFO L225 Difference]: With dead ends: 291 [2021-11-20 23:46:02,649 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 23:46:02,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:02,652 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 21 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:02,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 299 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:46:02,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 23:46:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2021-11-20 23:46:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.461111111111111) internal successors, (263), 180 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 263 transitions. [2021-11-20 23:46:02,667 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 263 transitions. Word has length 55 [2021-11-20 23:46:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:02,667 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 263 transitions. [2021-11-20 23:46:02,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 263 transitions. [2021-11-20 23:46:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 23:46:02,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:02,671 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:02,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:46:02,671 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1707005379, now seen corresponding path program 1 times [2021-11-20 23:46:02,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:02,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650953667] [2021-11-20 23:46:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:02,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:46:02,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:02,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650953667] [2021-11-20 23:46:02,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650953667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:02,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:02,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:02,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964301838] [2021-11-20 23:46:02,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:02,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:02,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:02,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:02,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:02,797 INFO L87 Difference]: Start difference. First operand 181 states and 263 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:04,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:05,603 INFO L93 Difference]: Finished difference Result 291 states and 419 transitions. [2021-11-20 23:46:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:05,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 23:46:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:05,607 INFO L225 Difference]: With dead ends: 291 [2021-11-20 23:46:05,607 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 23:46:05,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:05,609 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 19 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:05,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 297 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:46:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 23:46:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2021-11-20 23:46:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4555555555555555) internal successors, (262), 180 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 262 transitions. [2021-11-20 23:46:05,623 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 262 transitions. Word has length 56 [2021-11-20 23:46:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:05,624 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 262 transitions. [2021-11-20 23:46:05,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 262 transitions. [2021-11-20 23:46:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 23:46:05,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:05,627 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:05,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:46:05,628 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:05,629 INFO L85 PathProgramCache]: Analyzing trace with hash -598596810, now seen corresponding path program 1 times [2021-11-20 23:46:05,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:05,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525473039] [2021-11-20 23:46:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:05,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:46:05,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:05,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525473039] [2021-11-20 23:46:05,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525473039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:46:05,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85907554] [2021-11-20 23:46:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:05,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:05,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:05,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:05,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:46:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:06,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:46:06,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:46:06,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:06,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85907554] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:46:06,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:06,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-20 23:46:06,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672064471] [2021-11-20 23:46:06,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:06,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:46:06,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:06,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:46:06,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:06,703 INFO L87 Difference]: Start difference. First operand 181 states and 262 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 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) [2021-11-20 23:46:08,736 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:09,107 INFO L93 Difference]: Finished difference Result 183 states and 263 transitions. [2021-11-20 23:46:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:46:09,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 23:46:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:09,110 INFO L225 Difference]: With dead ends: 183 [2021-11-20 23:46:09,110 INFO L226 Difference]: Without dead ends: 181 [2021-11-20 23:46:09,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:09,112 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:09,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 101 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:46:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-20 23:46:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-20 23:46:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.45) internal successors, (261), 180 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 261 transitions. [2021-11-20 23:46:09,123 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 261 transitions. Word has length 56 [2021-11-20 23:46:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:09,124 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 261 transitions. [2021-11-20 23:46:09,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 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) [2021-11-20 23:46:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 261 transitions. [2021-11-20 23:46:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 23:46:09,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:09,127 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:09,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 23:46:09,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:09,335 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash 132870385, now seen corresponding path program 1 times [2021-11-20 23:46:09,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:09,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096217008] [2021-11-20 23:46:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:09,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:46:09,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:09,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096217008] [2021-11-20 23:46:09,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096217008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:46:09,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966704973] [2021-11-20 23:46:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:09,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:09,513 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:09,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:46:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:46:09,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:46:10,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:10,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966704973] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:46:10,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:10,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-20 23:46:10,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068475398] [2021-11-20 23:46:10,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:10,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:46:10,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:10,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:46:10,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:10,269 INFO L87 Difference]: Start difference. First operand 181 states and 261 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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) [2021-11-20 23:46:12,283 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:12,738 INFO L93 Difference]: Finished difference Result 353 states and 513 transitions. [2021-11-20 23:46:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:46:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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) Word has length 58 [2021-11-20 23:46:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:12,744 INFO L225 Difference]: With dead ends: 353 [2021-11-20 23:46:12,744 INFO L226 Difference]: Without dead ends: 351 [2021-11-20 23:46:12,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:46:12,746 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 80 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:12,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 203 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:46:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-20 23:46:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 347. [2021-11-20 23:46:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.4653179190751444) internal successors, (507), 346 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 507 transitions. [2021-11-20 23:46:12,763 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 507 transitions. Word has length 58 [2021-11-20 23:46:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:12,764 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 507 transitions. [2021-11-20 23:46:12,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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) [2021-11-20 23:46:12,765 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 507 transitions. [2021-11-20 23:46:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 23:46:12,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:12,767 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:12,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:12,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:12,981 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:12,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1551371309, now seen corresponding path program 1 times [2021-11-20 23:46:12,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:12,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016878505] [2021-11-20 23:46:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:12,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:13,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:13,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016878505] [2021-11-20 23:46:13,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016878505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:13,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:13,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:13,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624296050] [2021-11-20 23:46:13,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:13,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:13,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:13,097 INFO L87 Difference]: Start difference. First operand 347 states and 507 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2021-11-20 23:46:15,107 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:15,735 INFO L93 Difference]: Finished difference Result 773 states and 1131 transitions. [2021-11-20 23:46:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:15,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) Word has length 77 [2021-11-20 23:46:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:15,742 INFO L225 Difference]: With dead ends: 773 [2021-11-20 23:46:15,743 INFO L226 Difference]: Without dead ends: 429 [2021-11-20 23:46:15,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:15,745 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 31 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:15,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 317 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 23:46:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-20 23:46:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 391. [2021-11-20 23:46:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.494871794871795) internal successors, (583), 390 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 583 transitions. [2021-11-20 23:46:15,765 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 583 transitions. Word has length 77 [2021-11-20 23:46:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:15,766 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 583 transitions. [2021-11-20 23:46:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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) [2021-11-20 23:46:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 583 transitions. [2021-11-20 23:46:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 23:46:15,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:15,768 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:15,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:46:15,769 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash -558306479, now seen corresponding path program 2 times [2021-11-20 23:46:15,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:15,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985863674] [2021-11-20 23:46:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:15,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 23:46:15,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:15,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985863674] [2021-11-20 23:46:15,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985863674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:15,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:15,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:15,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751397818] [2021-11-20 23:46:15,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:15,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:15,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:15,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:15,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:15,895 INFO L87 Difference]: Start difference. First operand 391 states and 583 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:17,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:18,616 INFO L93 Difference]: Finished difference Result 643 states and 941 transitions. [2021-11-20 23:46:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 77 [2021-11-20 23:46:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:18,621 INFO L225 Difference]: With dead ends: 643 [2021-11-20 23:46:18,622 INFO L226 Difference]: Without dead ends: 429 [2021-11-20 23:46:18,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:18,623 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 38 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:18,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 317 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:46:18,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-20 23:46:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 391. [2021-11-20 23:46:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4897435897435898) internal successors, (581), 390 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 581 transitions. [2021-11-20 23:46:18,644 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 581 transitions. Word has length 77 [2021-11-20 23:46:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:18,644 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 581 transitions. [2021-11-20 23:46:18,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 581 transitions. [2021-11-20 23:46:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 23:46:18,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:18,647 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:18,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:46:18,648 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash 116041728, now seen corresponding path program 1 times [2021-11-20 23:46:18,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:18,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440050285] [2021-11-20 23:46:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:18,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 23:46:18,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:18,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440050285] [2021-11-20 23:46:18,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440050285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:18,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:18,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:18,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121168787] [2021-11-20 23:46:18,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:18,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:18,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:18,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:18,746 INFO L87 Difference]: Start difference. First operand 391 states and 581 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:20,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:21,492 INFO L93 Difference]: Finished difference Result 641 states and 936 transitions. [2021-11-20 23:46:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 78 [2021-11-20 23:46:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:21,497 INFO L225 Difference]: With dead ends: 641 [2021-11-20 23:46:21,497 INFO L226 Difference]: Without dead ends: 427 [2021-11-20 23:46:21,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:21,499 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 36 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:21,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 315 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:46:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-20 23:46:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 391. [2021-11-20 23:46:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4846153846153847) internal successors, (579), 390 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 579 transitions. [2021-11-20 23:46:21,519 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 579 transitions. Word has length 78 [2021-11-20 23:46:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:21,520 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 579 transitions. [2021-11-20 23:46:21,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 579 transitions. [2021-11-20 23:46:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 23:46:21,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:21,523 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:21,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:46:21,523 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash -155407950, now seen corresponding path program 3 times [2021-11-20 23:46:21,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:21,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257573294] [2021-11-20 23:46:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:21,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:21,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:21,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257573294] [2021-11-20 23:46:21,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257573294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:21,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:21,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:21,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966924336] [2021-11-20 23:46:21,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:21,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:21,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:21,648 INFO L87 Difference]: Start difference. First operand 391 states and 579 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:23,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:24,694 INFO L93 Difference]: Finished difference Result 815 states and 1195 transitions. [2021-11-20 23:46:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-20 23:46:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:24,699 INFO L225 Difference]: With dead ends: 815 [2021-11-20 23:46:24,699 INFO L226 Difference]: Without dead ends: 427 [2021-11-20 23:46:24,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:24,702 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 42 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:24,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 317 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 23:46:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-20 23:46:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 391. [2021-11-20 23:46:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4794871794871796) internal successors, (577), 390 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 577 transitions. [2021-11-20 23:46:24,723 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 577 transitions. Word has length 88 [2021-11-20 23:46:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:24,724 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 577 transitions. [2021-11-20 23:46:24,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 577 transitions. [2021-11-20 23:46:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 23:46:24,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:24,726 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:24,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:46:24,727 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1688639982, now seen corresponding path program 1 times [2021-11-20 23:46:24,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585056265] [2021-11-20 23:46:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:24,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:24,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:24,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585056265] [2021-11-20 23:46:24,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585056265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:24,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:24,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:24,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843598390] [2021-11-20 23:46:24,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:24,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:24,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:24,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:24,858 INFO L87 Difference]: Start difference. First operand 391 states and 577 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:26,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:27,624 INFO L93 Difference]: Finished difference Result 815 states and 1191 transitions. [2021-11-20 23:46:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-20 23:46:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:27,629 INFO L225 Difference]: With dead ends: 815 [2021-11-20 23:46:27,629 INFO L226 Difference]: Without dead ends: 427 [2021-11-20 23:46:27,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:27,631 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 40 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:27,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 313 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:46:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-20 23:46:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 391. [2021-11-20 23:46:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4743589743589745) internal successors, (575), 390 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 575 transitions. [2021-11-20 23:46:27,651 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 575 transitions. Word has length 89 [2021-11-20 23:46:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:27,651 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 575 transitions. [2021-11-20 23:46:27,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 575 transitions. [2021-11-20 23:46:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 23:46:27,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:27,654 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:27,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:46:27,654 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1912526271, now seen corresponding path program 1 times [2021-11-20 23:46:27,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:27,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229128000] [2021-11-20 23:46:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:27,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:27,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:27,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229128000] [2021-11-20 23:46:27,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229128000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:27,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:27,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:27,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792131290] [2021-11-20 23:46:27,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:27,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:27,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:27,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:27,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:27,755 INFO L87 Difference]: Start difference. First operand 391 states and 575 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:29,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:30,609 INFO L93 Difference]: Finished difference Result 815 states and 1187 transitions. [2021-11-20 23:46:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:30,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 90 [2021-11-20 23:46:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:30,614 INFO L225 Difference]: With dead ends: 815 [2021-11-20 23:46:30,614 INFO L226 Difference]: Without dead ends: 427 [2021-11-20 23:46:30,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:30,619 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 38 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:30,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 311 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:46:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-20 23:46:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 391. [2021-11-20 23:46:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4692307692307693) internal successors, (573), 390 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 573 transitions. [2021-11-20 23:46:30,641 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 573 transitions. Word has length 90 [2021-11-20 23:46:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:30,641 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 573 transitions. [2021-11-20 23:46:30,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 573 transitions. [2021-11-20 23:46:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 23:46:30,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:30,644 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:30,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:46:30,645 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:30,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:30,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1822949783, now seen corresponding path program 1 times [2021-11-20 23:46:30,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:30,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286499714] [2021-11-20 23:46:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:30,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:30,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286499714] [2021-11-20 23:46:30,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286499714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:30,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:30,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:30,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555566124] [2021-11-20 23:46:30,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:30,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:30,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:30,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:30,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:30,770 INFO L87 Difference]: Start difference. First operand 391 states and 573 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:32,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:33,573 INFO L93 Difference]: Finished difference Result 815 states and 1183 transitions. [2021-11-20 23:46:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:33,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-20 23:46:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:33,578 INFO L225 Difference]: With dead ends: 815 [2021-11-20 23:46:33,578 INFO L226 Difference]: Without dead ends: 427 [2021-11-20 23:46:33,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:33,580 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 36 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:33,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 309 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:46:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-20 23:46:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 391. [2021-11-20 23:46:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.464102564102564) internal successors, (571), 390 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 571 transitions. [2021-11-20 23:46:33,600 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 571 transitions. Word has length 91 [2021-11-20 23:46:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:33,601 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 571 transitions. [2021-11-20 23:46:33,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 571 transitions. [2021-11-20 23:46:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 23:46:33,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:33,604 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:33,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:46:33,604 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:33,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:33,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1794204382, now seen corresponding path program 4 times [2021-11-20 23:46:33,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:33,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468823009] [2021-11-20 23:46:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:33,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:33,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:33,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468823009] [2021-11-20 23:46:33,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468823009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:33,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:33,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:33,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904800285] [2021-11-20 23:46:33,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:33,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:33,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:33,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:33,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:33,745 INFO L87 Difference]: Start difference. First operand 391 states and 571 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:35,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:36,638 INFO L93 Difference]: Finished difference Result 815 states and 1179 transitions. [2021-11-20 23:46:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:36,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-20 23:46:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:36,642 INFO L225 Difference]: With dead ends: 815 [2021-11-20 23:46:36,643 INFO L226 Difference]: Without dead ends: 427 [2021-11-20 23:46:36,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:36,644 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 31 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:36,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 307 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 23:46:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-20 23:46:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 391. [2021-11-20 23:46:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.458974358974359) internal successors, (569), 390 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 569 transitions. [2021-11-20 23:46:36,665 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 569 transitions. Word has length 91 [2021-11-20 23:46:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:36,666 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 569 transitions. [2021-11-20 23:46:36,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 569 transitions. [2021-11-20 23:46:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 23:46:36,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:36,668 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:36,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:46:36,669 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1010501980, now seen corresponding path program 1 times [2021-11-20 23:46:36,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:36,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546805295] [2021-11-20 23:46:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:36,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:36,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:36,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546805295] [2021-11-20 23:46:36,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546805295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:36,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:36,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:36,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783812730] [2021-11-20 23:46:36,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:36,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:36,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:36,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:36,780 INFO L87 Difference]: Start difference. First operand 391 states and 569 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:38,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:39,610 INFO L93 Difference]: Finished difference Result 801 states and 1159 transitions. [2021-11-20 23:46:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:39,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-20 23:46:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:39,614 INFO L225 Difference]: With dead ends: 801 [2021-11-20 23:46:39,615 INFO L226 Difference]: Without dead ends: 413 [2021-11-20 23:46:39,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:39,616 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 29 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:39,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 297 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:46:39,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-20 23:46:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 391. [2021-11-20 23:46:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4538461538461538) internal successors, (567), 390 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 567 transitions. [2021-11-20 23:46:39,637 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 567 transitions. Word has length 92 [2021-11-20 23:46:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:39,638 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 567 transitions. [2021-11-20 23:46:39,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 567 transitions. [2021-11-20 23:46:39,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 23:46:39,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:39,641 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:39,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:46:39,641 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:39,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:39,642 INFO L85 PathProgramCache]: Analyzing trace with hash -395692331, now seen corresponding path program 1 times [2021-11-20 23:46:39,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:39,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086153603] [2021-11-20 23:46:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:39,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:39,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:39,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086153603] [2021-11-20 23:46:39,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086153603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:39,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:39,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:39,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935923699] [2021-11-20 23:46:39,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:39,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:39,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:39,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:39,757 INFO L87 Difference]: Start difference. First operand 391 states and 567 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:41,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:42,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:42,634 INFO L93 Difference]: Finished difference Result 797 states and 1151 transitions. [2021-11-20 23:46:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-20 23:46:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:42,639 INFO L225 Difference]: With dead ends: 797 [2021-11-20 23:46:42,639 INFO L226 Difference]: Without dead ends: 409 [2021-11-20 23:46:42,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:42,641 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 23 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:42,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 295 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:46:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-20 23:46:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 391. [2021-11-20 23:46:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4487179487179487) internal successors, (565), 390 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 565 transitions. [2021-11-20 23:46:42,682 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 565 transitions. Word has length 92 [2021-11-20 23:46:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:42,683 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 565 transitions. [2021-11-20 23:46:42,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 565 transitions. [2021-11-20 23:46:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 23:46:42,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:42,686 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:42,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 23:46:42,686 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:42,687 INFO L85 PathProgramCache]: Analyzing trace with hash 252640029, now seen corresponding path program 1 times [2021-11-20 23:46:42,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:42,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104192207] [2021-11-20 23:46:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:42,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:42,789 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:42,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104192207] [2021-11-20 23:46:42,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104192207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:42,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:42,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:42,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057150756] [2021-11-20 23:46:42,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:42,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:42,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:42,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:42,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:42,793 INFO L87 Difference]: Start difference. First operand 391 states and 565 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:44,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:45,495 INFO L93 Difference]: Finished difference Result 797 states and 1147 transitions. [2021-11-20 23:46:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:45,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-20 23:46:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:45,500 INFO L225 Difference]: With dead ends: 797 [2021-11-20 23:46:45,500 INFO L226 Difference]: Without dead ends: 409 [2021-11-20 23:46:45,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:45,502 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 21 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:45,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 293 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:46:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-20 23:46:45,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 391. [2021-11-20 23:46:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4435897435897436) internal successors, (563), 390 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 563 transitions. [2021-11-20 23:46:45,524 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 563 transitions. Word has length 94 [2021-11-20 23:46:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:45,524 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 563 transitions. [2021-11-20 23:46:45,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 563 transitions. [2021-11-20 23:46:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 23:46:45,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:45,527 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:45,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 23:46:45,528 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:45,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:45,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1381800234, now seen corresponding path program 1 times [2021-11-20 23:46:45,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:45,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535942201] [2021-11-20 23:46:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:45,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 23:46:45,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535942201] [2021-11-20 23:46:45,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535942201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:45,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:45,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:45,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102939407] [2021-11-20 23:46:45,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:45,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:45,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:45,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:45,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:45,649 INFO L87 Difference]: Start difference. First operand 391 states and 563 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:47,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:48,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:48,345 INFO L93 Difference]: Finished difference Result 789 states and 1133 transitions. [2021-11-20 23:46:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:48,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-20 23:46:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:48,350 INFO L225 Difference]: With dead ends: 789 [2021-11-20 23:46:48,351 INFO L226 Difference]: Without dead ends: 401 [2021-11-20 23:46:48,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:48,353 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 15 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:48,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 287 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:46:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-20 23:46:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 391. [2021-11-20 23:46:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4384615384615385) internal successors, (561), 390 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 561 transitions. [2021-11-20 23:46:48,375 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 561 transitions. Word has length 95 [2021-11-20 23:46:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:48,375 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 561 transitions. [2021-11-20 23:46:48,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 561 transitions. [2021-11-20 23:46:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 23:46:48,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:48,378 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:48,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 23:46:48,379 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1292070603, now seen corresponding path program 1 times [2021-11-20 23:46:48,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:48,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011810914] [2021-11-20 23:46:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:48,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 23:46:48,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:48,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011810914] [2021-11-20 23:46:48,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011810914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:46:48,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862579860] [2021-11-20 23:46:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:48,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:48,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:48,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:48,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:46:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:46:48,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 23:46:49,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 23:46:49,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862579860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:49,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [882339498] [2021-11-20 23:46:49,852 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2021-11-20 23:46:49,852 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:49,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:49,867 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:49,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:53,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:53,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:53,171 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:46:53,175 INFO L158 Benchmark]: Toolchain (without parser) took 74688.00ms. Allocated memory was 96.5MB in the beginning and 205.5MB in the end (delta: 109.1MB). Free memory was 56.9MB in the beginning and 89.2MB in the end (delta: -32.2MB). Peak memory consumption was 118.3MB. Max. memory is 16.1GB. [2021-11-20 23:46:53,176 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 96.5MB. Free memory is still 75.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:46:53,176 INFO L158 Benchmark]: CACSL2BoogieTranslator took 837.22ms. Allocated memory is still 96.5MB. Free memory was 56.7MB in the beginning and 51.4MB in the end (delta: 5.3MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2021-11-20 23:46:53,176 INFO L158 Benchmark]: Boogie Procedure Inliner took 175.08ms. Allocated memory is still 96.5MB. Free memory was 51.4MB in the beginning and 46.8MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:46:53,177 INFO L158 Benchmark]: Boogie Preprocessor took 155.91ms. Allocated memory is still 96.5MB. Free memory was 46.8MB in the beginning and 40.1MB in the end (delta: 6.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 23:46:53,177 INFO L158 Benchmark]: RCFGBuilder took 4164.86ms. Allocated memory was 96.5MB in the beginning and 140.5MB in the end (delta: 44.0MB). Free memory was 40.1MB in the beginning and 53.0MB in the end (delta: -12.9MB). Peak memory consumption was 34.5MB. Max. memory is 16.1GB. [2021-11-20 23:46:53,185 INFO L158 Benchmark]: TraceAbstraction took 69345.03ms. Allocated memory was 140.5MB in the beginning and 205.5MB in the end (delta: 65.0MB). Free memory was 53.0MB in the beginning and 89.2MB in the end (delta: -36.2MB). Peak memory consumption was 67.2MB. Max. memory is 16.1GB. [2021-11-20 23:46:53,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 96.5MB. Free memory is still 75.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 837.22ms. Allocated memory is still 96.5MB. Free memory was 56.7MB in the beginning and 51.4MB in the end (delta: 5.3MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 175.08ms. Allocated memory is still 96.5MB. Free memory was 51.4MB in the beginning and 46.8MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 155.91ms. Allocated memory is still 96.5MB. Free memory was 46.8MB in the beginning and 40.1MB in the end (delta: 6.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 4164.86ms. Allocated memory was 96.5MB in the beginning and 140.5MB in the end (delta: 44.0MB). Free memory was 40.1MB in the beginning and 53.0MB in the end (delta: -12.9MB). Peak memory consumption was 34.5MB. Max. memory is 16.1GB. * TraceAbstraction took 69345.03ms. Allocated memory was 140.5MB in the beginning and 205.5MB in the end (delta: 65.0MB). Free memory was 53.0MB in the beginning and 89.2MB in the end (delta: -36.2MB). Peak memory consumption was 67.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 23:46:53,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/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_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 781939b227b3ba0a20ad2d0323c2d13ae338349fb5c0bf292cccf74fd05cfb42 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:46:56,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:46:56,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:46:56,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:46:56,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:46:56,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:46:56,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:46:56,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:46:56,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:46:56,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:46:56,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:46:56,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:46:56,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:46:56,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:46:56,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:46:56,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:46:56,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:46:56,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:46:56,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:46:56,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:46:56,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:46:56,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:46:56,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:46:56,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:46:56,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:46:56,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:46:56,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:46:56,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:46:56,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:46:56,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:46:56,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:46:56,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:46:56,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:46:56,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:46:56,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:46:56,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:46:56,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:46:56,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:46:56,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:46:56,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:46:56,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:46:56,370 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-20 23:46:56,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:46:56,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:46:56,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:46:56,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:46:56,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:46:56,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:46:56,418 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:46:56,419 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:46:56,419 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:46:56,419 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:46:56,420 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:46:56,420 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:46:56,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:46:56,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:46:56,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:46:56,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:46:56,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:46:56,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:46:56,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:46:56,423 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:46:56,423 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:46:56,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:46:56,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:46:56,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:46:56,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:46:56,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:46:56,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:46:56,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:46:56,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:46:56,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:46:56,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:46:56,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:46:56,427 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:46:56,427 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:46:56,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:46:56,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:46:56,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:46:56,428 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_333c49d9-6260-4a89-a3b0-6ee825159858/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781939b227b3ba0a20ad2d0323c2d13ae338349fb5c0bf292cccf74fd05cfb42 [2021-11-20 23:46:56,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:46:56,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:46:56,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:46:56,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:46:56,957 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:46:56,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c [2021-11-20 23:46:57,050 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data/0428d6378/c181b2152c434cf68c8d1121e7d4aeff/FLAGa74ff6ef7 [2021-11-20 23:46:57,914 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:46:57,915 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c [2021-11-20 23:46:57,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data/0428d6378/c181b2152c434cf68c8d1121e7d4aeff/FLAGa74ff6ef7 [2021-11-20 23:46:58,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/data/0428d6378/c181b2152c434cf68c8d1121e7d4aeff [2021-11-20 23:46:58,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:46:58,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:46:58,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:46:58,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:46:58,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:46:58,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:58,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67df19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58, skipping insertion in model container [2021-11-20 23:46:58,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:58,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:46:58,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:46:58,728 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_333c49d9-6260-4a89-a3b0-6ee825159858/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c[65520,65533] [2021-11-20 23:46:58,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:46:58,765 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:46:58,931 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_333c49d9-6260-4a89-a3b0-6ee825159858/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-2.c[65520,65533] [2021-11-20 23:46:58,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:46:58,979 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:46:58,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58 WrapperNode [2021-11-20 23:46:58,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:46:58,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:46:58,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:46:58,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:46:58,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,145 INFO L137 Inliner]: procedures = 35, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 694 [2021-11-20 23:46:59,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:46:59,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:46:59,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:46:59,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:46:59,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:46:59,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:46:59,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:46:59,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:46:59,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (1/1) ... [2021-11-20 23:46:59,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:46:59,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:59,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:46:59,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:46:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:46:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:46:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:46:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:46:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:46:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:46:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:46:59,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:46:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:46:59,625 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:46:59,627 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:46:59,664 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:47:04,682 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-20 23:47:04,686 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-20 23:47:04,686 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:47:04,704 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:47:04,704 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:47:04,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:47:04 BoogieIcfgContainer [2021-11-20 23:47:04,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:47:04,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:47:04,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:47:04,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:47:04,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:46:58" (1/3) ... [2021-11-20 23:47:04,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f21b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:47:04, skipping insertion in model container [2021-11-20 23:47:04,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:58" (2/3) ... [2021-11-20 23:47:04,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f21b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:47:04, skipping insertion in model container [2021-11-20 23:47:04,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:47:04" (3/3) ... [2021-11-20 23:47:04,723 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.01.i.cil-2.c [2021-11-20 23:47:04,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:47:04,734 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:47:04,818 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:47:04,842 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:47:04,843 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:47:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:47:04,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:47:04,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:47:04,887 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:47:04,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:47:04,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1457703967, now seen corresponding path program 1 times [2021-11-20 23:47:04,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:47:04,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619459083] [2021-11-20 23:47:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:47:04,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:47:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:47:04,922 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:47:04,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:47:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:47:05,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:47:05,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:47:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:47:05,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:47:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:47:05,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:47:05,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619459083] [2021-11-20 23:47:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619459083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:47:05,951 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:47:05,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:47:05,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873264990] [2021-11-20 23:47:05,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:47:05,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:47:05,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:47:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:47:06,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:47:06,011 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 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 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:47:06,290 INFO L93 Difference]: Finished difference Result 375 states and 626 transitions. [2021-11-20 23:47:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:47:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 23:47:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:47:06,317 INFO L225 Difference]: With dead ends: 375 [2021-11-20 23:47:06,317 INFO L226 Difference]: Without dead ends: 217 [2021-11-20 23:47:06,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:47:06,336 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 363 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:47:06,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 397 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:47:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-20 23:47:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-11-20 23:47:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4814814814814814) internal successors, (320), 216 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 320 transitions. [2021-11-20 23:47:06,452 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 320 transitions. Word has length 24 [2021-11-20 23:47:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:47:06,453 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 320 transitions. [2021-11-20 23:47:06,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 320 transitions. [2021-11-20 23:47:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 23:47:06,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:47:06,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:47:06,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:47:06,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:47:06,658 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:47:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:47:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1495258694, now seen corresponding path program 1 times [2021-11-20 23:47:06,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:47:06,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228498771] [2021-11-20 23:47:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:47:06,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:47:06,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:47:06,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:47:06,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:47:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:47:06,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:47:06,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:47:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:47:07,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:47:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:47:07,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:47:07,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228498771] [2021-11-20 23:47:07,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228498771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:47:07,614 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:47:07,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:47:07,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329216050] [2021-11-20 23:47:07,615 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:47:07,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:47:07,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:47:07,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:47:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:47:07,618 INFO L87 Difference]: Start difference. First operand 217 states and 320 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:09,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:47:10,000 INFO L93 Difference]: Finished difference Result 628 states and 933 transitions. [2021-11-20 23:47:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:47:10,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 23:47:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:47:10,006 INFO L225 Difference]: With dead ends: 628 [2021-11-20 23:47:10,007 INFO L226 Difference]: Without dead ends: 521 [2021-11-20 23:47:10,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:47:10,010 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 252 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:47:10,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 762 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:47:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-20 23:47:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 421. [2021-11-20 23:47:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.480952380952381) internal successors, (622), 420 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 622 transitions. [2021-11-20 23:47:10,095 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 622 transitions. Word has length 41 [2021-11-20 23:47:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:47:10,097 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 622 transitions. [2021-11-20 23:47:10,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:10,097 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 622 transitions. [2021-11-20 23:47:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 23:47:10,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:47:10,112 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:47:10,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:47:10,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:47:10,323 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:47:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:47:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash 924360661, now seen corresponding path program 1 times [2021-11-20 23:47:10,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:47:10,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513859053] [2021-11-20 23:47:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:47:10,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:47:10,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:47:10,330 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:47:10,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:47:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:47:10,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:47:10,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:47:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:47:11,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:47:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:47:11,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:47:11,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513859053] [2021-11-20 23:47:11,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513859053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:47:11,727 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:47:11,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:47:11,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489044570] [2021-11-20 23:47:11,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:47:11,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:47:11,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:47:11,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:47:11,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:47:11,735 INFO L87 Difference]: Start difference. First operand 421 states and 622 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:13,755 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:47:14,024 INFO L93 Difference]: Finished difference Result 939 states and 1394 transitions. [2021-11-20 23:47:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:47:14,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-20 23:47:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:47:14,031 INFO L225 Difference]: With dead ends: 939 [2021-11-20 23:47:14,031 INFO L226 Difference]: Without dead ends: 628 [2021-11-20 23:47:14,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:47:14,036 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 273 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:47:14,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 609 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 23:47:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-20 23:47:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2021-11-20 23:47:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.4784688995215312) internal successors, (927), 627 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 927 transitions. [2021-11-20 23:47:14,080 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 927 transitions. Word has length 80 [2021-11-20 23:47:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:47:14,081 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 927 transitions. [2021-11-20 23:47:14,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:47:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 927 transitions. [2021-11-20 23:47:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 23:47:14,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:47:14,085 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:47:14,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:47:14,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:47:14,299 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:47:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:47:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1855651051, now seen corresponding path program 1 times [2021-11-20 23:47:14,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:47:14,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281700954] [2021-11-20 23:47:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:47:14,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:47:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:47:14,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:47:14,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_333c49d9-6260-4a89-a3b0-6ee825159858/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:47:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:47:14,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:47:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:47:15,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:47:15,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 2058 treesize of output 1842 [2021-11-20 23:47:23,390 WARN L227 SmtUtils]: Spent 7.93s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:47:23,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:47:23,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2067 treesize of output 1935 [2021-11-20 23:52:31,484 WARN L227 SmtUtils]: Spent 5.13m on a formula simplification. DAG size of input: 319 DAG size of output: 206 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:52:31,488 INFO L354 Elim1Store]: treesize reduction 2124, result has 44.1 percent of original size [2021-11-20 23:52:31,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 1863 treesize of output 2169 [2021-11-20 23:52:31,711 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 2202 treesize of output 1980 [2021-11-20 23:52:31,832 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 1980 treesize of output 1758 [2021-11-20 23:55:50,076 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 8 treesize of output 4 [2021-11-20 23:58:34,192 WARN L227 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 14 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)