./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bor1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bor1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur --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 dc029b09d1398b404e1aee83359480f2bc7a4040f694547fb82d365d81b9786a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:34:31,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:34:31,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:34:31,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:34:31,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:34:31,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:34:31,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:34:31,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:34:31,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:34:31,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:34:31,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:34:31,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:34:31,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:34:31,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:34:31,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:34:31,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:34:31,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:34:31,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:34:31,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:34:31,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:34:31,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:34:31,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:34:31,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:34:31,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:34:32,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:34:32,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:34:32,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:34:32,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:34:32,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:34:32,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:34:32,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:34:32,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:34:32,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:34:32,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:34:32,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:34:32,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:34:32,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:34:32,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:34:32,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:34:32,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:34:32,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:34:32,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:34:32,036 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:34:32,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:34:32,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:34:32,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:34:32,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:34:32,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:34:32,038 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:34:32,038 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:34:32,038 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:34:32,039 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:34:32,039 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:34:32,039 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:34:32,039 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:34:32,040 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:34:32,040 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:34:32,040 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:34:32,040 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:34:32,041 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:34:32,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:34:32,042 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:34:32,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:34:32,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:34:32,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:34:32,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:34:32,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:34:32,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:34:32,043 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:34:32,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:34:32,044 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:34:32,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:34:32,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:34:32,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:34:32,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:34:32,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:34:32,045 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:34:32,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:34:32,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:34:32,046 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:34:32,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:34:32,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:34:32,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:34:32,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc029b09d1398b404e1aee83359480f2bc7a4040f694547fb82d365d81b9786a [2022-11-25 22:34:32,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:34:32,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:34:32,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:34:32,340 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:34:32,340 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:34:32,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-crafted/bor1.i [2022-11-25 22:34:35,345 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:34:35,537 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:34:35,538 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/sv-benchmarks/c/array-crafted/bor1.i [2022-11-25 22:34:35,543 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/data/3d1107cfa/9763fcc2d2b542549e40650d4c7aabcc/FLAG10ea94b22 [2022-11-25 22:34:35,558 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/data/3d1107cfa/9763fcc2d2b542549e40650d4c7aabcc [2022-11-25 22:34:35,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:34:35,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:34:35,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:34:35,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:34:35,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:34:35,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ef59d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35, skipping insertion in model container [2022-11-25 22:34:35,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:34:35,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:34:35,778 WARN L237 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_fd369e6e-6f9d-4e41-828e-0625040be765/sv-benchmarks/c/array-crafted/bor1.i[1285,1298] [2022-11-25 22:34:35,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:34:35,793 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:34:35,821 WARN L237 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_fd369e6e-6f9d-4e41-828e-0625040be765/sv-benchmarks/c/array-crafted/bor1.i[1285,1298] [2022-11-25 22:34:35,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:34:35,837 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:34:35,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35 WrapperNode [2022-11-25 22:34:35,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:34:35,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:34:35,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:34:35,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:34:35,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,914 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-11-25 22:34:35,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:34:35,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:34:35,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:34:35,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:34:35,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,941 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:34:35,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:34:35,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:34:35,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:34:35,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (1/1) ... [2022-11-25 22:34:35,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:34:35,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:36,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:34:36,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:34:36,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:34:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-11-25 22:34:36,045 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-11-25 22:34:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:34:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:34:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:34:36,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:34:36,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:34:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:34:36,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:34:36,116 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:34:36,119 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:34:36,277 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:34:36,342 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:34:36,350 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 22:34:36,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:34:36 BoogieIcfgContainer [2022-11-25 22:34:36,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:34:36,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:34:36,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:34:36,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:34:36,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:34:35" (1/3) ... [2022-11-25 22:34:36,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23332d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:34:36, skipping insertion in model container [2022-11-25 22:34:36,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:34:35" (2/3) ... [2022-11-25 22:34:36,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23332d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:34:36, skipping insertion in model container [2022-11-25 22:34:36,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:34:36" (3/3) ... [2022-11-25 22:34:36,363 INFO L112 eAbstractionObserver]: Analyzing ICFG bor1.i [2022-11-25 22:34:36,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:34:36,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:34:36,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:34:36,450 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@277f3e57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:34:36,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:34:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:34:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 22:34:36,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:36,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:36,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:36,473 INFO L85 PathProgramCache]: Analyzing trace with hash 100807982, now seen corresponding path program 1 times [2022-11-25 22:34:36,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:36,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283632169] [2022-11-25 22:34:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:36,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:34:36,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283632169] [2022-11-25 22:34:36,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283632169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:34:36,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:34:36,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:34:36,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454858152] [2022-11-25 22:34:36,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:34:36,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:34:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:36,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:34:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:34:36,946 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:34:37,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:37,052 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-25 22:34:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:34:37,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-25 22:34:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:37,065 INFO L225 Difference]: With dead ends: 33 [2022-11-25 22:34:37,065 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 22:34:37,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:34:37,072 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:37,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:34:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 22:34:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 22:34:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:34:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-25 22:34:37,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-25 22:34:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:37,133 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-25 22:34:37,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:34:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-25 22:34:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 22:34:37,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:37,138 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:37,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:34:37,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -757343262, now seen corresponding path program 1 times [2022-11-25 22:34:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:37,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650298914] [2022-11-25 22:34:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:34:37,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:37,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650298914] [2022-11-25 22:34:37,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650298914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:37,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138076447] [2022-11-25 22:34:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:37,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:37,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:37,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:37,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:34:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:37,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:34:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:34:37,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:34:37,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138076447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:34:37,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:34:37,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-25 22:34:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344853543] [2022-11-25 22:34:37,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:34:37,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:34:37,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:34:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:34:37,548 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:34:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:37,587 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-25 22:34:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:34:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-25 22:34:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:37,593 INFO L225 Difference]: With dead ends: 29 [2022-11-25 22:34:37,593 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 22:34:37,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:34:37,595 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:37,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:34:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 22:34:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 22:34:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:34:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-25 22:34:37,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-25 22:34:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:37,601 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-25 22:34:37,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:34:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-25 22:34:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 22:34:37,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:37,602 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:37,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:37,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 22:34:37,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1111287051, now seen corresponding path program 1 times [2022-11-25 22:34:37,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:37,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080208556] [2022-11-25 22:34:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:37,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:34:38,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080208556] [2022-11-25 22:34:38,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080208556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:38,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648303433] [2022-11-25 22:34:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:38,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:38,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:38,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:38,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:34:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:34:38,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:34:38,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:34:38,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648303433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:34:38,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:34:38,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-25 22:34:38,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670428111] [2022-11-25 22:34:38,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:34:38,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:34:38,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:38,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:34:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:34:38,155 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:34:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:38,177 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-25 22:34:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:34:38,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-25 22:34:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:38,179 INFO L225 Difference]: With dead ends: 27 [2022-11-25 22:34:38,179 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 22:34:38,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:34:38,181 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:38,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:34:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 22:34:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 22:34:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:34:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-25 22:34:38,187 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-25 22:34:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:38,188 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-25 22:34:38,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:34:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-25 22:34:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 22:34:38,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:38,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:38,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:38,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:38,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:38,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1287279236, now seen corresponding path program 1 times [2022-11-25 22:34:38,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:38,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324839372] [2022-11-25 22:34:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:38,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:34:38,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324839372] [2022-11-25 22:34:38,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324839372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:38,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671228403] [2022-11-25 22:34:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:38,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:38,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:38,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:38,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:34:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:38,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:34:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:34:38,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:34:38,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671228403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:38,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178007117] [2022-11-25 22:34:38,763 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:34:38,763 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:38,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:38,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:38,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:38,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:38,969 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:34:38,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:34:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:39,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:34:39,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:39,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-25 22:34:39,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:39,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:39,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:39,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:39,357 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-25 22:34:39,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-25 22:34:39,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:34:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:39,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:34:39,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:39,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 22:34:40,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:40,035 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-25 22:34:40,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-25 22:34:40,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:34:40,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:34:40,266 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:34:40,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:47,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-25 22:34:47,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:47,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:34:47,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-25 22:34:47,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651685975] [2022-11-25 22:34:47,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:47,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:34:47,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:34:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-11-25 22:34:47,516 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:34:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:47,560 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-25 22:34:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:34:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-25 22:34:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:47,561 INFO L225 Difference]: With dead ends: 36 [2022-11-25 22:34:47,561 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 22:34:47,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-11-25 22:34:47,563 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:47,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:34:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 22:34:47,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-25 22:34:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:34:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-25 22:34:47,573 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-25 22:34:47,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:47,573 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-25 22:34:47,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:34:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-25 22:34:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 22:34:47,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:47,576 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:47,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:47,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:47,782 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash -897184312, now seen corresponding path program 2 times [2022-11-25 22:34:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:47,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144413328] [2022-11-25 22:34:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:47,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:34:47,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:47,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144413328] [2022-11-25 22:34:47,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144413328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:47,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865560671] [2022-11-25 22:34:47,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:34:47,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:47,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:47,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:47,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:34:48,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:34:48,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:34:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:34:48,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:34:48,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:34:48,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865560671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:48,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1193680814] [2022-11-25 22:34:48,084 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:34:48,084 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:48,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:48,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:48,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,118 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:34:48,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 22:34:48,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,148 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:34:48,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:34:48,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-25 22:34:48,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,321 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-25 22:34:48,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-25 22:34:48,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:34:48,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:34:48,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:48,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:34:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,667 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:34:48,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:34:48,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:34:48,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:34:48,825 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:34:48,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:53,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_12 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_12 4294967296) (+ (- 4294967296) (mod v_bor_~res~0_BEFORE_RETURN_12 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:34:53,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:53,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:34:53,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 22:34:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581472494] [2022-11-25 22:34:53,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:53,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:34:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:34:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:34:53,939 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:34:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:53,979 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-25 22:34:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:34:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-25 22:34:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:53,985 INFO L225 Difference]: With dead ends: 38 [2022-11-25 22:34:53,985 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 22:34:53,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:34:53,986 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:53,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:34:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 22:34:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 22:34:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:34:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-25 22:34:53,991 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-25 22:34:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:53,991 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-25 22:34:53,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:34:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-25 22:34:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:34:53,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:53,993 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:54,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:54,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:54,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:54,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:54,194 INFO L85 PathProgramCache]: Analyzing trace with hash -776270593, now seen corresponding path program 3 times [2022-11-25 22:34:54,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:54,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846668743] [2022-11-25 22:34:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:54,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-25 22:34:54,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:54,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846668743] [2022-11-25 22:34:54,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846668743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:54,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499225225] [2022-11-25 22:34:54,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:34:54,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:54,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:54,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:34:54,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:34:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:34:54,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:34:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 22:34:54,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 22:34:54,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499225225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:54,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634318221] [2022-11-25 22:34:54,545 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:34:54,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:54,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:54,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:54,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,588 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:34:54,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 22:34:54,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,621 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:34:54,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:34:54,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-25 22:34:54,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:54,774 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-25 22:34:54,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-25 22:34:54,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:34:54,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:34:55,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:55,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:55,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:34:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:55,108 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:34:55,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:34:55,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:34:55,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:34:55,246 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:34:55,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:35:00,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:35:00,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:35:00,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:35:00,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-11-25 22:35:00,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256034348] [2022-11-25 22:35:00,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:35:00,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 22:35:00,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 22:35:00,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-25 22:35:00,539 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:35:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:00,601 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-25 22:35:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:35:00,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-11-25 22:35:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:00,603 INFO L225 Difference]: With dead ends: 49 [2022-11-25 22:35:00,603 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 22:35:00,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-25 22:35:00,604 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:00,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:35:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 22:35:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 22:35:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:35:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-25 22:35:00,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-25 22:35:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:00,610 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-25 22:35:00,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:35:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-25 22:35:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 22:35:00,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:00,611 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:00,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:00,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 22:35:00,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:00,819 INFO L85 PathProgramCache]: Analyzing trace with hash -896043506, now seen corresponding path program 4 times [2022-11-25 22:35:00,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:00,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309148726] [2022-11-25 22:35:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:00,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-25 22:35:01,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:01,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309148726] [2022-11-25 22:35:01,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309148726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:01,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707238933] [2022-11-25 22:35:01,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:35:01,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:01,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:01,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:35:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:01,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:35:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-25 22:35:01,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:35:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-25 22:35:01,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707238933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:35:01,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360254136] [2022-11-25 22:35:01,578 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:35:01,578 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:35:01,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:35:01,578 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:35:01,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:35:01,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,614 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:35:01,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:35:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:35:01,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-25 22:35:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,761 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-25 22:35:01,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-25 22:35:01,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:35:01,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:35:01,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:01,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:01,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:35:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:02,022 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:35:02,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:35:02,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:35:02,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:35:02,165 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:35:02,232 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:35:03,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:35:03,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:35:03,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:35:03,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-11-25 22:35:03,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343982458] [2022-11-25 22:35:03,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:35:03,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 22:35:03,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:03,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 22:35:03,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 22:35:03,265 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:35:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:03,318 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-25 22:35:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 22:35:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-25 22:35:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:03,320 INFO L225 Difference]: With dead ends: 62 [2022-11-25 22:35:03,320 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 22:35:03,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 22:35:03,322 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:03,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:35:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 22:35:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-25 22:35:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:35:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-25 22:35:03,328 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-11-25 22:35:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:03,328 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-25 22:35:03,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:35:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-25 22:35:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 22:35:03,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:03,330 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:03,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:03,536 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1269752562, now seen corresponding path program 5 times [2022-11-25 22:35:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:03,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204707306] [2022-11-25 22:35:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:03,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-25 22:35:04,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:04,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204707306] [2022-11-25 22:35:04,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204707306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:04,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555216706] [2022-11-25 22:35:04,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:35:04,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:04,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:04,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:35:04,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:35:04,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:35:04,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:35:04,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-25 22:35:04,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:35:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-25 22:35:04,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555216706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:35:04,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1846382486] [2022-11-25 22:35:04,859 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:35:04,860 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:35:04,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:35:04,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:35:04,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:35:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:04,889 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:35:04,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 22:35:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:04,932 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:35:04,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:35:04,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:04,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-25 22:35:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,062 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-25 22:35:05,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-25 22:35:05,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:35:05,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:35:05,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 22:35:05,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:05,363 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-25 22:35:05,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-25 22:35:05,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:35:05,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:35:05,525 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:35:05,626 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:35:06,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_29 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_29 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_29 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_29 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:35:06,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:35:06,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:35:06,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-11-25 22:35:06,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916709305] [2022-11-25 22:35:06,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:35:06,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 22:35:06,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:06,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 22:35:06,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 22:35:06,931 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:35:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:07,050 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-25 22:35:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 22:35:07,055 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-11-25 22:35:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:07,056 INFO L225 Difference]: With dead ends: 69 [2022-11-25 22:35:07,056 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 22:35:07,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 22:35:07,058 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:07,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:35:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 22:35:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-25 22:35:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:35:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-25 22:35:07,066 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-11-25 22:35:07,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:07,066 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-25 22:35:07,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:35:07,066 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-25 22:35:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 22:35:07,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:07,071 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:07,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:07,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 22:35:07,272 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash -210336222, now seen corresponding path program 6 times [2022-11-25 22:35:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196769727] [2022-11-25 22:35:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 22:35:08,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:08,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196769727] [2022-11-25 22:35:08,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196769727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:08,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411752352] [2022-11-25 22:35:08,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:35:08,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:08,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:08,426 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:08,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:35:08,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:35:08,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:35:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:35:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 22:35:08,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:35:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 22:35:09,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411752352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:35:09,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080915273] [2022-11-25 22:35:09,617 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:35:09,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:35:09,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:35:09,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:35:09,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:35:09,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,650 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:35:09,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:35:09,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:35:09,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-25 22:35:09,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,787 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-25 22:35:09,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-25 22:35:09,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:35:09,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:09,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:35:10,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:10,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 22:35:10,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:10,084 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-25 22:35:10,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-25 22:35:10,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:35:10,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:35:10,230 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:35:10,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:35:15,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:35:15,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:35:15,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:35:15,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-11-25 22:35:15,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625059223] [2022-11-25 22:35:15,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:35:15,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 22:35:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 22:35:15,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 22:35:15,551 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:35:15,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:15,663 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-11-25 22:35:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 22:35:15,664 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-11-25 22:35:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:15,664 INFO L225 Difference]: With dead ends: 100 [2022-11-25 22:35:15,665 INFO L226 Difference]: Without dead ends: 75 [2022-11-25 22:35:15,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 22:35:15,667 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:15,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:35:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-25 22:35:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-25 22:35:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:35:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-25 22:35:15,676 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2022-11-25 22:35:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:15,676 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-25 22:35:15,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:35:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-25 22:35:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-25 22:35:15,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:15,678 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:15,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:15,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:15,887 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:15,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1390752494, now seen corresponding path program 7 times [2022-11-25 22:35:15,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:15,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046753531] [2022-11-25 22:35:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:15,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 22:35:18,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046753531] [2022-11-25 22:35:18,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046753531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498035997] [2022-11-25 22:35:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:35:18,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:18,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:18,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:18,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:35:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:19,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 22:35:19,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 22:35:19,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:35:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 22:35:22,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498035997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:35:22,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901222651] [2022-11-25 22:35:22,451 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:35:22,452 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:35:22,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:35:22,452 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:35:22,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:35:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,489 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:35:22,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:35:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:35:22,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-25 22:35:22,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:22,632 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-25 22:35:22,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-25 22:35:22,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:35:22,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:35:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:22,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:35:22,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:22,912 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:35:22,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:35:22,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:35:22,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:35:23,056 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:35:23,147 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:35:28,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_41 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_41 4294967296) (+ (- 4294967296) (mod v_bor_~res~0_BEFORE_RETURN_41 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:35:28,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:35:28,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:35:28,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2022-11-25 22:35:28,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36156996] [2022-11-25 22:35:28,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:35:28,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-25 22:35:28,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:28,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-25 22:35:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-25 22:35:28,701 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:35:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:28,906 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2022-11-25 22:35:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-25 22:35:28,907 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2022-11-25 22:35:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:28,908 INFO L225 Difference]: With dead ends: 150 [2022-11-25 22:35:28,908 INFO L226 Difference]: Without dead ends: 125 [2022-11-25 22:35:28,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-25 22:35:28,912 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:28,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:35:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-25 22:35:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-25 22:35:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:35:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-11-25 22:35:28,924 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2022-11-25 22:35:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:28,924 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-11-25 22:35:28,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:35:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-11-25 22:35:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-25 22:35:28,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:28,927 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:28,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:29,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:35:29,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1157257874, now seen corresponding path program 8 times [2022-11-25 22:35:29,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:29,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074126806] [2022-11-25 22:35:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:29,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 22:35:37,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:37,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074126806] [2022-11-25 22:35:37,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074126806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:37,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442526336] [2022-11-25 22:35:37,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:35:37,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:37,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:37,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:37,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:35:37,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:35:37,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:35:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:35:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2022-11-25 22:35:38,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:35:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2022-11-25 22:35:38,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442526336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:35:38,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404275555] [2022-11-25 22:35:38,228 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:35:38,228 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:35:38,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:35:38,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:35:38,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:35:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,257 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:35:38,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 22:35:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,285 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:35:38,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:35:38,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-25 22:35:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,419 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-25 22:35:38,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-25 22:35:38,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:35:38,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:35:38,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:38,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:35:38,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:38,712 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:35:38,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:35:38,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:35:38,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:35:38,848 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:35:38,914 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:35:45,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-25 22:35:45,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:35:45,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:35:45,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2022-11-25 22:35:45,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611264585] [2022-11-25 22:35:45,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:35:45,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-25 22:35:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-25 22:35:45,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5136, Invalid=9143, Unknown=1, NotChecked=0, Total=14280 [2022-11-25 22:35:45,588 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:35:45,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:45,788 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-11-25 22:35:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-25 22:35:45,789 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-25 22:35:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:45,790 INFO L225 Difference]: With dead ends: 155 [2022-11-25 22:35:45,790 INFO L226 Difference]: Without dead ends: 130 [2022-11-25 22:35:45,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=5136, Invalid=9143, Unknown=1, NotChecked=0, Total=14280 [2022-11-25 22:35:45,794 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:45,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:35:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-25 22:35:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-25 22:35:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:35:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-11-25 22:35:45,805 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2022-11-25 22:35:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:45,806 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-11-25 22:35:45,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:35:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-11-25 22:35:45,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-25 22:35:45,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:45,809 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:45,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:46,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:46,014 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1881747810, now seen corresponding path program 9 times [2022-11-25 22:35:46,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:46,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123055533] [2022-11-25 22:35:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:46,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-25 22:35:53,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123055533] [2022-11-25 22:35:53,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123055533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729951889] [2022-11-25 22:35:53,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:35:53,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:53,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:53,730 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:53,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:35:54,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:35:54,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:35:54,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-25 22:35:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-25 22:35:54,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:35:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-25 22:35:59,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729951889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:35:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1865304005] [2022-11-25 22:35:59,160 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:35:59,160 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:35:59,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:35:59,161 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:35:59,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:35:59,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,192 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:35:59,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:35:59,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:35:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-25 22:35:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,326 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-25 22:35:59,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-25 22:35:59,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:35:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:35:59,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:59,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:35:59,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:59,576 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:35:59,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:35:59,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:35:59,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:35:59,736 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:35:59,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:05,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7025#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:05,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:05,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:05,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 103 [2022-11-25 22:36:05,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892032087] [2022-11-25 22:36:05,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:05,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-25 22:36:05,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-25 22:36:05,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5312, Invalid=8027, Unknown=1, NotChecked=0, Total=13340 [2022-11-25 22:36:05,950 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:36:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:06,095 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-11-25 22:36:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-25 22:36:06,099 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2022-11-25 22:36:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:06,100 INFO L225 Difference]: With dead ends: 160 [2022-11-25 22:36:06,101 INFO L226 Difference]: Without dead ends: 131 [2022-11-25 22:36:06,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 100 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6788 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=5312, Invalid=8027, Unknown=1, NotChecked=0, Total=13340 [2022-11-25 22:36:06,103 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:06,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-25 22:36:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-25 22:36:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:36:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-11-25 22:36:06,113 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 155 [2022-11-25 22:36:06,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:06,114 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-11-25 22:36:06,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:36:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-11-25 22:36:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-25 22:36:06,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:06,117 INFO L195 NwaCegarLoop]: trace histogram [100, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:06,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:06,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 22:36:06,325 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash -563898322, now seen corresponding path program 10 times [2022-11-25 22:36:06,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:06,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335754095] [2022-11-25 22:36:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:06,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-25 22:36:06,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335754095] [2022-11-25 22:36:06,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335754095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251205298] [2022-11-25 22:36:06,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:36:06,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:06,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:06,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:06,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:36:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:36:07,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-25 22:36:07,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-25 22:36:07,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251205298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:07,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945643036] [2022-11-25 22:36:07,651 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:36:07,651 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:07,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:07,652 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:07,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:07,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:07,681 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:36:07,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 22:36:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:07,710 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:36:07,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:36:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:07,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-25 22:36:07,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:07,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:07,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:07,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:07,830 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-25 22:36:07,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-25 22:36:07,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:36:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:08,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:36:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:08,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:36:08,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:08,154 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:36:08,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:36:08,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:36:08,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:36:08,293 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:36:08,365 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:11,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8552#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:11,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:11,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:11,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-25 22:36:11,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883209231] [2022-11-25 22:36:11,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:11,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 22:36:11,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:11,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 22:36:11,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 22:36:11,414 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:36:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:11,456 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2022-11-25 22:36:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 22:36:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2022-11-25 22:36:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:11,458 INFO L225 Difference]: With dead ends: 171 [2022-11-25 22:36:11,458 INFO L226 Difference]: Without dead ends: 143 [2022-11-25 22:36:11,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 22:36:11,459 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:11,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:36:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-25 22:36:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-25 22:36:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:36:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-11-25 22:36:11,469 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 156 [2022-11-25 22:36:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:11,470 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-11-25 22:36:11,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:36:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-11-25 22:36:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-25 22:36:11,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:11,473 INFO L195 NwaCegarLoop]: trace histogram [100, 66, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:11,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:11,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 22:36:11,680 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:11,681 INFO L85 PathProgramCache]: Analyzing trace with hash 874271470, now seen corresponding path program 11 times [2022-11-25 22:36:11,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:11,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452555262] [2022-11-25 22:36:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:11,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 6110 trivial. 0 not checked. [2022-11-25 22:36:13,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:13,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452555262] [2022-11-25 22:36:13,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452555262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:13,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851176830] [2022-11-25 22:36:13,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:36:13,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:13,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:13,109 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:13,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:36:13,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:36:13,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:36:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:36:13,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 1062 proven. 21 refuted. 0 times theorem prover too weak. 6340 trivial. 0 not checked. [2022-11-25 22:36:13,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7402 trivial. 0 not checked. [2022-11-25 22:36:13,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851176830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328086887] [2022-11-25 22:36:13,949 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:36:13,949 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:13,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:13,950 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:13,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:13,983 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:36:13,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:36:13,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:13,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:36:14,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:14,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-25 22:36:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:14,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:14,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:14,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:14,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:14,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:14,119 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-25 22:36:14,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-25 22:36:14,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:36:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:14,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:36:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:14,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:14,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:36:14,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:14,388 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:36:14,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:36:14,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:36:14,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:36:14,506 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:36:14,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:19,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10355#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (exists ((v_bor_~res~0_BEFORE_RETURN_65 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_65 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_65 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_65 4294967296) (- 4294967296))))) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-25 22:36:19,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:19,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:19,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-11-25 22:36:19,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598852324] [2022-11-25 22:36:19,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:19,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 22:36:19,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:19,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 22:36:19,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 22:36:19,880 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:36:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:19,966 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2022-11-25 22:36:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 22:36:19,967 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 192 [2022-11-25 22:36:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:19,968 INFO L225 Difference]: With dead ends: 192 [2022-11-25 22:36:19,968 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 22:36:19,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 22:36:19,970 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:19,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 22:36:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-25 22:36:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:36:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-11-25 22:36:19,980 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 192 [2022-11-25 22:36:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:19,981 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-11-25 22:36:19,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:36:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-11-25 22:36:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-25 22:36:19,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:19,984 INFO L195 NwaCegarLoop]: trace histogram [100, 69, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:19,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:20,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:20,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:20,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1571786263, now seen corresponding path program 12 times [2022-11-25 22:36:20,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:20,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758015775] [2022-11-25 22:36:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:20,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-25 22:36:21,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:21,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758015775] [2022-11-25 22:36:21,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758015775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:21,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274214186] [2022-11-25 22:36:21,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:36:21,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:21,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:21,710 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:21,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:36:22,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:36:22,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:36:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:36:22,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 1154 proven. 276 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-25 22:36:22,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-25 22:36:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274214186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489443501] [2022-11-25 22:36:23,241 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:36:23,241 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:23,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:23,242 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:23,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:23,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,273 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:36:23,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:36:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:36:23,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-25 22:36:23,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:23,425 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-25 22:36:23,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-25 22:36:23,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:36:23,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:36:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 22:36:23,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:23,717 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-25 22:36:23,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-25 22:36:23,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:36:23,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:36:23,899 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:36:23,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:29,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12296#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_72 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:29,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:29,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:29,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-11-25 22:36:29,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146549195] [2022-11-25 22:36:29,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:29,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 22:36:29,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:29,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 22:36:29,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 22:36:29,122 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:36:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:29,220 INFO L93 Difference]: Finished difference Result 226 states and 260 transitions. [2022-11-25 22:36:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 22:36:29,220 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 203 [2022-11-25 22:36:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:29,222 INFO L225 Difference]: With dead ends: 226 [2022-11-25 22:36:29,222 INFO L226 Difference]: Without dead ends: 177 [2022-11-25 22:36:29,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 22:36:29,224 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:29,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-25 22:36:29,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-25 22:36:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:36:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-11-25 22:36:29,235 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 203 [2022-11-25 22:36:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:29,235 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-11-25 22:36:29,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:36:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-11-25 22:36:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-25 22:36:29,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:29,240 INFO L195 NwaCegarLoop]: trace histogram [144, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:29,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:29,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:36:29,448 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1382861838, now seen corresponding path program 13 times [2022-11-25 22:36:29,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:29,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538056431] [2022-11-25 22:36:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:29,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-25 22:36:33,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:33,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538056431] [2022-11-25 22:36:33,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538056431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:33,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600640113] [2022-11-25 22:36:33,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:36:33,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:33,319 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:33,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 22:36:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:33,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 22:36:33,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 4804 proven. 1176 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-25 22:36:34,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-25 22:36:37,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600640113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:37,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344370838] [2022-11-25 22:36:37,317 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:36:37,317 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:37,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:37,318 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:37,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,353 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:36:37,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:36:37,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:36:37,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-25 22:36:37,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:37,500 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-25 22:36:37,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-25 22:36:37,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:36:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:36:37,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:37,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:36:37,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:37,781 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:36:37,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:36:37,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:36:37,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:36:37,914 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:36:38,005 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:39,517 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14855#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_77 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_77 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_77 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_77 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:39,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:39,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:39,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-11-25 22:36:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252194732] [2022-11-25 22:36:39,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:39,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-25 22:36:39,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-25 22:36:39,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-25 22:36:39,529 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:36:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:39,711 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2022-11-25 22:36:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-25 22:36:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 278 [2022-11-25 22:36:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:39,714 INFO L225 Difference]: With dead ends: 301 [2022-11-25 22:36:39,714 INFO L226 Difference]: Without dead ends: 227 [2022-11-25 22:36:39,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-25 22:36:39,717 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:39,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-25 22:36:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-11-25 22:36:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:36:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2022-11-25 22:36:39,729 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 278 [2022-11-25 22:36:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:39,730 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2022-11-25 22:36:39,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:36:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2022-11-25 22:36:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-11-25 22:36:39,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:39,733 INFO L195 NwaCegarLoop]: trace histogram [294, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:39,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:39,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 22:36:39,943 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:39,943 INFO L85 PathProgramCache]: Analyzing trace with hash 504703534, now seen corresponding path program 14 times [2022-11-25 22:36:39,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:39,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104836599] [2022-11-25 22:36:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 24455 refuted. 0 times theorem prover too weak. 24662 trivial. 0 not checked. [2022-11-25 22:36:52,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:52,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104836599] [2022-11-25 22:36:52,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104836599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:52,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731723690] [2022-11-25 22:36:52,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:36:52,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:52,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:52,927 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:52,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 22:36:54,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 22:36:54,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:36:54,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:36:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 19606 proven. 105 refuted. 0 times theorem prover too weak. 29406 trivial. 0 not checked. [2022-11-25 22:36:55,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 49012 trivial. 0 not checked. [2022-11-25 22:36:56,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731723690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702100575] [2022-11-25 22:36:56,266 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:36:56,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:56,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:56,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:56,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,297 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:36:56,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 22:36:56,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,323 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:36:56,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:36:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-25 22:36:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:56,452 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-25 22:36:56,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-25 22:36:56,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:36:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:36:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:56,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:36:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:56,713 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:36:56,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:36:56,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:36:56,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:36:56,827 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:36:56,879 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:37:01,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18594#(and (exists ((v_bor_~res~0_BEFORE_RETURN_84 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_84 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_84 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_84 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:37:01,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:37:01,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:37:01,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 17, 17] total 131 [2022-11-25 22:37:01,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434438016] [2022-11-25 22:37:01,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:37:01,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-25 22:37:01,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-25 22:37:01,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-11-25 22:37:01,267 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:37:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:01,513 INFO L93 Difference]: Finished difference Result 368 states and 394 transitions. [2022-11-25 22:37:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-25 22:37:01,513 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 428 [2022-11-25 22:37:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:01,515 INFO L225 Difference]: With dead ends: 368 [2022-11-25 22:37:01,515 INFO L226 Difference]: Without dead ends: 244 [2022-11-25 22:37:01,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1241 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4808 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-11-25 22:37:01,518 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:01,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:37:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-25 22:37:01,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-11-25 22:37:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:37:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 248 transitions. [2022-11-25 22:37:01,532 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 248 transitions. Word has length 428 [2022-11-25 22:37:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:01,533 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 248 transitions. [2022-11-25 22:37:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 22:37:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 248 transitions. [2022-11-25 22:37:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-11-25 22:37:01,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:01,537 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:01,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 22:37:01,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 22:37:01,737 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1040970281, now seen corresponding path program 15 times [2022-11-25 22:37:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:01,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484805081] [2022-11-25 22:37:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:01,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-25 22:37:05,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:05,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484805081] [2022-11-25 22:37:05,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484805081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:37:05,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493780660] [2022-11-25 22:37:05,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:37:05,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:05,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:37:05,451 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:37:05,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 22:37:06,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:37:06,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:37:06,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 2436 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 22:37:06,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:37:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 20004 proven. 465 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-11-25 22:37:06,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:37:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-25 22:37:07,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493780660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:37:07,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619833071] [2022-11-25 22:37:07,794 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:37:07,794 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:37:07,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:37:07,794 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:37:07,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:37:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:07,826 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:37:07,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 22:37:07,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:07,851 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:37:07,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:37:07,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:07,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-25 22:37:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:07,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:07,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:07,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:07,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:07,976 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-25 22:37:07,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-25 22:37:08,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:37:08,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:08,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:37:08,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:08,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-25 22:37:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:08,300 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-25 22:37:08,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-25 22:37:08,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:37:08,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:37:08,433 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:37:08,499 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:37:11,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22549#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:37:11,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:37:11,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:37:11,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-11-25 22:37:11,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461846373] [2022-11-25 22:37:11,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:37:11,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-25 22:37:11,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-25 22:37:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-11-25 22:37:11,800 INFO L87 Difference]: Start difference. First operand 244 states and 248 transitions. Second operand has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:37:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:11,911 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2022-11-25 22:37:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-25 22:37:11,912 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 447 [2022-11-25 22:37:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:11,914 INFO L225 Difference]: With dead ends: 383 [2022-11-25 22:37:11,914 INFO L226 Difference]: Without dead ends: 276 [2022-11-25 22:37:11,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1372 GetRequests, 1296 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-11-25 22:37:11,916 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:11,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:37:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-25 22:37:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-25 22:37:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:37:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-11-25 22:37:11,931 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 447 [2022-11-25 22:37:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:11,931 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-11-25 22:37:11,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:37:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-11-25 22:37:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-25 22:37:11,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:11,936 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 62, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:11,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 22:37:12,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 22:37:12,137 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:12,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:12,137 INFO L85 PathProgramCache]: Analyzing trace with hash -130551767, now seen corresponding path program 16 times [2022-11-25 22:37:12,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:12,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725927030] [2022-11-25 22:37:12,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:12,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-25 22:37:19,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:19,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725927030] [2022-11-25 22:37:19,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725927030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:37:19,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74845334] [2022-11-25 22:37:19,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:37:19,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:19,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:37:19,919 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:37:19,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 22:37:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:20,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-25 22:37:20,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:37:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 20004 proven. 1953 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-11-25 22:37:21,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:37:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-25 22:37:24,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74845334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:37:24,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139581957] [2022-11-25 22:37:24,803 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:37:24,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:37:24,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:37:24,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:37:24,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:37:24,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,832 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:37:24,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-25 22:37:24,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,858 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:37:24,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:37:24,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-25 22:37:24,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,990 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-25 22:37:24,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-25 22:37:25,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:37:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:25,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-25 22:37:25,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:25,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:25,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-25 22:37:25,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:25,205 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 22:37:25,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-25 22:37:25,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-25 22:37:25,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:37:25,334 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-25 22:37:25,393 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:37:27,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26829#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_96 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_96 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_96 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_96 4294967296) (- 4294967296))))))' at error location [2022-11-25 22:37:27,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:37:27,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:37:27,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 102 [2022-11-25 22:37:27,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438267600] [2022-11-25 22:37:27,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:37:27,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-25 22:37:27,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:27,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-25 22:37:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-11-25 22:37:27,069 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:37:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:27,292 INFO L93 Difference]: Finished difference Result 420 states and 461 transitions. [2022-11-25 22:37:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-25 22:37:27,293 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 479 [2022-11-25 22:37:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:27,295 INFO L225 Difference]: With dead ends: 420 [2022-11-25 22:37:27,295 INFO L226 Difference]: Without dead ends: 313 [2022-11-25 22:37:27,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1360 SyntacticMatches, 27 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-11-25 22:37:27,298 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:27,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:37:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-25 22:37:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-11-25 22:37:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0097402597402598) internal successors, (311), 308 states have internal predecessors, (311), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:37:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 317 transitions. [2022-11-25 22:37:27,314 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 317 transitions. Word has length 479 [2022-11-25 22:37:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:27,315 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 317 transitions. [2022-11-25 22:37:27,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:37:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 317 transitions. [2022-11-25 22:37:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-11-25 22:37:27,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:27,320 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 99, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:27,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 22:37:27,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd369e6e-6f9d-4e41-828e-0625040be765/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:27,533 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:27,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1740799112, now seen corresponding path program 17 times [2022-11-25 22:37:27,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:27,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547109747] [2022-11-25 22:37:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:27,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:48:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 22:48:26,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.