./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg10-2.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_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/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_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/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_06ce0375-49cf-49e7-bada-afa88462d3c7/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 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 --- 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 23:22:59,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:22:59,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:22:59,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:22:59,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:22:59,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:22:59,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:22:59,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:22:59,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:22:59,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:22:59,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:22:59,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:22:59,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:22:59,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:23:00,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:23:00,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:23:00,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:23:00,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:23:00,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:23:00,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:23:00,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:23:00,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:23:00,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:23:00,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:23:00,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:23:00,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:23:00,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:23:00,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:23:00,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:23:00,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:23:00,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:23:00,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:23:00,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:23:00,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:23:00,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:23:00,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:23:00,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:23:00,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:23:00,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:23:00,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:23:00,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:23:00,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:23:00,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:23:00,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:23:00,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:23:00,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:23:00,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:23:00,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:23:00,052 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:23:00,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:23:00,052 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:23:00,052 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:23:00,052 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:23:00,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:23:00,053 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:23:00,053 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:23:00,053 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:23:00,054 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:23:00,054 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:23:00,054 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:23:00,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:23:00,055 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:23:00,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:23:00,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:23:00,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:23:00,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:23:00,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:23:00,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:23:00,056 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:23:00,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:23:00,057 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:23:00,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:23:00,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:23:00,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:23:00,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:23:00,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:23:00,058 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:23:00,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:23:00,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:23:00,059 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:23:00,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:23:00,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:23:00,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:23:00,060 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_06ce0375-49cf-49e7-bada-afa88462d3c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 [2022-11-25 23:23:00,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:23:00,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:23:00,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:23:00,333 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:23:00,333 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:23:00,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/reducercommutativity/avg10-2.i [2022-11-25 23:23:03,483 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:23:03,695 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:23:03,696 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/sv-benchmarks/c/reducercommutativity/avg10-2.i [2022-11-25 23:23:03,704 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/data/3de45a73b/8381e84cef1e41f795c9ad88d2b52f11/FLAG01fb85a65 [2022-11-25 23:23:03,723 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/data/3de45a73b/8381e84cef1e41f795c9ad88d2b52f11 [2022-11-25 23:23:03,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:23:03,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:23:03,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:23:03,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:23:03,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:23:03,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:03,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b59d7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03, skipping insertion in model container [2022-11-25 23:23:03,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:03,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:23:03,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:23:03,933 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_06ce0375-49cf-49e7-bada-afa88462d3c7/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2022-11-25 23:23:03,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:23:03,946 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:23:03,974 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_06ce0375-49cf-49e7-bada-afa88462d3c7/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2022-11-25 23:23:03,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:23:03,989 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:23:03,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03 WrapperNode [2022-11-25 23:23:03,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:23:03,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:23:03,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:23:03,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:23:03,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,022 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-25 23:23:04,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:23:04,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:23:04,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:23:04,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:23:04,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,055 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:23:04,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:23:04,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:23:04,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:23:04,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (1/1) ... [2022-11-25 23:23:04,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:23:04,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:04,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:23:04,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:23:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:23:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:23:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:23:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:23:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-11-25 23:23:04,163 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-11-25 23:23:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:23:04,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:23:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:23:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:23:04,245 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:23:04,248 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:23:04,553 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:23:04,614 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:23:04,614 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 23:23:04,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:23:04 BoogieIcfgContainer [2022-11-25 23:23:04,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:23:04,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:23:04,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:23:04,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:23:04,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:23:03" (1/3) ... [2022-11-25 23:23:04,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e74aeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:23:04, skipping insertion in model container [2022-11-25 23:23:04,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:03" (2/3) ... [2022-11-25 23:23:04,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e74aeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:23:04, skipping insertion in model container [2022-11-25 23:23:04,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:23:04" (3/3) ... [2022-11-25 23:23:04,636 INFO L112 eAbstractionObserver]: Analyzing ICFG avg10-2.i [2022-11-25 23:23:04,666 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:23:04,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:23:04,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:23:04,724 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;@5e2f59f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:23:04,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:23:04,732 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 23:23:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 23:23:04,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:04,741 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:23:04,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:04,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1847977284, now seen corresponding path program 1 times [2022-11-25 23:23:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986514717] [2022-11-25 23:23:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:04,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:05,116 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 23:23:05,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:05,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986514717] [2022-11-25 23:23:05,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986514717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:05,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:23:05,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:23:05,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144039281] [2022-11-25 23:23:05,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:05,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:23:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:23:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:23:05,158 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 23:23:05,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:05,236 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-25 23:23:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:23:05,239 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 23:23:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:05,246 INFO L225 Difference]: With dead ends: 33 [2022-11-25 23:23:05,246 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 23:23:05,249 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 23:23:05,256 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 23:23:05,258 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 23:23:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 23:23:05,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 23:23:05,301 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 23:23:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-25 23:23:05,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-25 23:23:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:05,307 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-25 23:23:05,307 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 23:23:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-25 23:23:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:23:05,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:05,311 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 23:23:05,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:23:05,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:05,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:05,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1923649121, now seen corresponding path program 1 times [2022-11-25 23:23:05,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:05,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551657295] [2022-11-25 23:23:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:05,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:05,460 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 23:23:05,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551657295] [2022-11-25 23:23:05,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551657295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:05,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931146276] [2022-11-25 23:23:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:05,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:05,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:05,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:05,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:23:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:23:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:05,603 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 23:23:05,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:23:05,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931146276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:05,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:23:05,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-25 23:23:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854552017] [2022-11-25 23:23:05,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:05,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:23:05,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:05,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:23:05,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:23:05,608 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 23:23:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:05,630 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-25 23:23:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:23:05,631 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 23:23:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:05,632 INFO L225 Difference]: With dead ends: 29 [2022-11-25 23:23:05,632 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 23:23:05,633 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 23:23:05,634 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 23:23:05,635 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 23:23:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 23:23:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 23:23:05,639 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 23:23:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-25 23:23:05,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-25 23:23:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:05,641 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-25 23:23:05,641 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 23:23:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-25 23:23:05,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:23:05,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:05,642 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 23:23:05,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:05,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:05,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash -55252021, now seen corresponding path program 1 times [2022-11-25 23:23:05,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:05,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602842395] [2022-11-25 23:23:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:05,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:06,068 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 23:23:06,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:06,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602842395] [2022-11-25 23:23:06,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602842395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:06,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253855860] [2022-11-25 23:23:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:06,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:06,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:06,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:06,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:23:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:23:06,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:06,222 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 23:23:06,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:23:06,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253855860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:06,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:23:06,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-25 23:23:06,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816098204] [2022-11-25 23:23:06,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:06,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:23:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:23:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:23:06,240 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 23:23:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:06,260 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-25 23:23:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:23:06,261 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 23:23:06,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:06,262 INFO L225 Difference]: With dead ends: 27 [2022-11-25 23:23:06,262 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 23:23:06,263 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 23:23:06,264 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 23:23:06,264 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 23:23:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 23:23:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 23:23:06,268 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 23:23:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-25 23:23:06,269 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-25 23:23:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:06,271 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-25 23:23:06,271 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 23:23:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-25 23:23:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:23:06,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:06,273 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 23:23:06,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:06,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:06,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1228256621, now seen corresponding path program 1 times [2022-11-25 23:23:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:06,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007034136] [2022-11-25 23:23:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:06,566 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 23:23:06,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:06,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007034136] [2022-11-25 23:23:06,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007034136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:06,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176199534] [2022-11-25 23:23:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:06,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:06,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:06,569 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:06,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:23:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:06,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:23:06,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:06,720 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 23:23:06,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:06,777 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 23:23:06,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176199534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:06,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597580039] [2022-11-25 23:23:06,801 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:23:06,801 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:23:06,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:23:06,819 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:23:06,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:23:06,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:06,949 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:23:06,953 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 23:23:06,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:07,002 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:23:07,002 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 23:23:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:07,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 28 [2022-11-25 23:23:07,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:07,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:23:07,217 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:23:07,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-25 23:23:07,422 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 23:23:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:07,563 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 23:23:07,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:07,753 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 23:23:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:07,837 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-25 23:23:07,838 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 23:23:07,940 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 23:23:07,953 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 23:23:08,109 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-25 23:23:08,151 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:23:53,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_5 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 10)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_5 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 10)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_5 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_5 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_5 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_5 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:23:53,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:23:53,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:23:53,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-25 23:23:53,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27687728] [2022-11-25 23:23:53,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:23:53,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:23:53,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:23:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-25 23:23:53,494 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 23:23:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:53,533 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-25 23:23:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:23:53,533 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 23:23:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:53,534 INFO L225 Difference]: With dead ends: 36 [2022-11-25 23:23:53,534 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 23:23:53,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-25 23:23:53,536 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 23:23:53,536 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 23:23:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 23:23:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-25 23:23:53,540 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 23:23:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-25 23:23:53,540 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-25 23:23:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:53,541 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-25 23:23:53,541 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 23:23:53,541 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-25 23:23:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:23:53,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:53,542 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 23:23:53,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 23:23:53,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:53,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2048081288, now seen corresponding path program 2 times [2022-11-25 23:23:53,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:53,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327421297] [2022-11-25 23:23:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:53,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:53,877 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 23:23:53,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:53,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327421297] [2022-11-25 23:23:53,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327421297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:53,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615438821] [2022-11-25 23:23:53,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:23:53,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:53,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:53,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:53,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:23:53,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:23:53,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:23:53,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:23:53,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:53,991 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 23:23:53,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:54,023 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 23:23:54,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615438821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:54,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219323130] [2022-11-25 23:23:54,030 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:23:54,031 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:23:54,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:23:54,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:23:54,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:23:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:54,076 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:23:54,076 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 23:23:54,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:54,089 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 23:23:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:54,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 31 treesize of output 33 [2022-11-25 23:23:54,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:54,185 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:23:54,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:23:54,238 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 23:23:54,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:54,309 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 23:23:54,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:54,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:23:54,450 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 23:23:54,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:23:54,497 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:23:54,498 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 23:23:54,532 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 23:23:54,543 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 23:23:54,674 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-25 23:23:54,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:24:39,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 10)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 10)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_12 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_12 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_12 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_12 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:24:39,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:24:39,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:24:39,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 23:24:39,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276805777] [2022-11-25 23:24:39,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:24:39,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:24:39,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:24:39,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:24:39,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-25 23:24:39,937 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 23:24:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:24:39,974 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-25 23:24:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:24:39,974 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 23:24:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:24:39,975 INFO L225 Difference]: With dead ends: 38 [2022-11-25 23:24:39,975 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 23:24:39,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=81, Invalid=287, Unknown=12, NotChecked=0, Total=380 [2022-11-25 23:24:39,976 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 23:24:39,977 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 23:24:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 23:24:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 23:24:39,985 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 23:24:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-25 23:24:39,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-25 23:24:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:24:39,986 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-25 23:24:39,986 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 23:24:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-25 23:24:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 23:24:39,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:24:39,988 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 23:24:39,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:24:40,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:40,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:24:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:24:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash -174007092, now seen corresponding path program 3 times [2022-11-25 23:24:40,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:24:40,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992951947] [2022-11-25 23:24:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:24:40,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:24:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:24:40,275 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 23:24:40,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:24:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992951947] [2022-11-25 23:24:40,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992951947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:24:40,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214596460] [2022-11-25 23:24:40,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:24:40,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:24:40,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:24:40,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:24:40,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:24:40,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:24:40,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:24:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:24:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:24:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:24:40,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:24:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:24:40,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214596460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:24:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274921664] [2022-11-25 23:24:40,524 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:24:40,524 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:24:40,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:24:40,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:24:40,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:24:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:40,558 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:24:40,559 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 23:24:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:40,570 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 23:24:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:40,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 31 treesize of output 33 [2022-11-25 23:24:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:40,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:40,650 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:24:40,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:24:40,712 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 23:24:40,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:40,772 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 23:24:40,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:40,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:24:40,876 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 23:24:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:24:40,920 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:24:40,921 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 23:24:40,943 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 23:24:40,955 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 23:24:41,067 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-25 23:24:41,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:25:26,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_17 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_17 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_17 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_17 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_17 10)) 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:25:26,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:25:26,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:25:26,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-25 23:25:26,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269684244] [2022-11-25 23:25:26,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:25:26,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:25:26,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:25:26,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:25:26,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=559, Unknown=12, NotChecked=0, Total=702 [2022-11-25 23:25:26,270 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:25:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:25:26,323 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2022-11-25 23:25:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:25:26,324 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2022-11-25 23:25:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:25:26,325 INFO L225 Difference]: With dead ends: 48 [2022-11-25 23:25:26,325 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 23:25:26,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=131, Invalid=559, Unknown=12, NotChecked=0, Total=702 [2022-11-25 23:25:26,326 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:25:26,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:25:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 23:25:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 23:25:26,331 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 23:25:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-25 23:25:26,331 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-25 23:25:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:25:26,332 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-25 23:25:26,332 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:25:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-25 23:25:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 23:25:26,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:25:26,333 INFO L195 NwaCegarLoop]: trace histogram [30, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:25:26,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:25:26,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:26,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:25:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:25:26,535 INFO L85 PathProgramCache]: Analyzing trace with hash 333155708, now seen corresponding path program 4 times [2022-11-25 23:25:26,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:25:26,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066203056] [2022-11-25 23:25:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:25:26,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:25:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:25:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 23:25:26,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:25:26,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066203056] [2022-11-25 23:25:26,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066203056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:25:26,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704592748] [2022-11-25 23:25:26,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:25:26,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:26,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:25:26,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:25:26,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:25:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:25:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:25:26,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:25:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 23:25:26,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-25 23:25:27,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704592748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:27,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [41451833] [2022-11-25 23:25:27,010 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:25:27,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:25:27,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:25:27,011 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:25:27,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:25:27,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:27,036 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:25:27,037 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 23:25:27,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:27,064 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:25:27,065 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 23:25:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:27,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 31 treesize of output 33 [2022-11-25 23:25:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:27,136 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:25:27,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-25 23:25:27,171 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 23:25:27,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:27,220 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 23:25:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:27,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:27,305 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 23:25:27,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:27,360 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:25:27,361 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 23:25:27,386 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 23:25:27,398 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 23:25:27,502 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-25 23:25:27,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:26:12,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1632#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (exists ((v_avg_~ret~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_24 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_24 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_24 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_24 10)) 4294967296) 2147483647) (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_24 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_24 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_24 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_24 10)) 4294967296) (+ (mod (ite (and (< v_avg_~ret~0_BEFORE_RETURN_24 0) (not (= (mod v_avg_~ret~0_BEFORE_RETURN_24 10) 0))) (+ (div v_avg_~ret~0_BEFORE_RETURN_24 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_24 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 23:26:12,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:26:12,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:26:12,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-11-25 23:26:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548938553] [2022-11-25 23:26:12,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:26:12,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:26:12,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:26:12,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:26:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=500, Unknown=12, NotChecked=0, Total=650 [2022-11-25 23:26:12,758 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 23:26:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:26:12,814 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-11-25 23:26:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:26:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 56 [2022-11-25 23:26:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:26:12,816 INFO L225 Difference]: With dead ends: 62 [2022-11-25 23:26:12,816 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 23:26:12,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=138, Invalid=500, Unknown=12, NotChecked=0, Total=650 [2022-11-25 23:26:12,818 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:26:12,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:26:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 23:26:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-25 23:26:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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 23:26:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-25 23:26:12,824 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 56 [2022-11-25 23:26:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:26:12,824 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-25 23:26:12,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 23:26:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-25 23:26:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 23:26:12,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:26:12,826 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:26:12,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:26:13,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:26:13,031 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:26:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:26:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1095007396, now seen corresponding path program 5 times [2022-11-25 23:26:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:26:13,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817732757] [2022-11-25 23:26:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:26:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:26:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:26:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-25 23:26:13,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:26:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817732757] [2022-11-25 23:26:13,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817732757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:26:13,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398180772] [2022-11-25 23:26:13,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:26:13,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:26:13,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:26:13,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:26:13,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:26:13,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:26:13,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:26:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:26:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:26:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-25 23:26:13,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:26:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-25 23:26:13,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398180772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:26:13,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710813724] [2022-11-25 23:26:13,342 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:26:13,342 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:26:13,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:26:13,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:26:13,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:26:13,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:26:13,366 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:26:13,367 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 23:26:13,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:26:13,389 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:26:13,389 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 23:26:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:26:13,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 28 [2022-11-25 23:26:13,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:26:13,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:26:13,510 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:26:13,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-25 23:26:13,577 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 23:26:13,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:26:13,640 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 23:26:13,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:26:13,731 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 23:26:13,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:26:13,788 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-25 23:26:13,789 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 23:26:13,837 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 23:26:13,848 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 23:26:13,978 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-25 23:26:14,009 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:26:59,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2195#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (exists ((v_avg_~ret~0_BEFORE_RETURN_30 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_30 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_30 0)) (+ 1 (div v_avg_~ret~0_BEFORE_RETURN_30 10)) (div v_avg_~ret~0_BEFORE_RETURN_30 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_30 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_30 0)) (+ 1 (div v_avg_~ret~0_BEFORE_RETURN_30 10)) (div v_avg_~ret~0_BEFORE_RETURN_30 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_30 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_30 0)) (+ 1 (div v_avg_~ret~0_BEFORE_RETURN_30 10)) (div v_avg_~ret~0_BEFORE_RETURN_30 10)) 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 23:26:59,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:26:59,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:26:59,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 23:26:59,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428863449] [2022-11-25 23:26:59,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:26:59,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:26:59,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:26:59,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:26:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=354, Unknown=12, NotChecked=0, Total=462 [2022-11-25 23:26:59,182 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 23:26:59,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:26:59,226 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-11-25 23:26:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:26:59,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 62 [2022-11-25 23:26:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:26:59,228 INFO L225 Difference]: With dead ends: 59 [2022-11-25 23:26:59,228 INFO L226 Difference]: Without dead ends: 41 [2022-11-25 23:26:59,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=96, Invalid=354, Unknown=12, NotChecked=0, Total=462 [2022-11-25 23:26:59,229 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:26:59,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:26:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-25 23:26:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-25 23:26:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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 23:26:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-25 23:26:59,251 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 62 [2022-11-25 23:26:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:26:59,252 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-25 23:26:59,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 23:26:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-25 23:26:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-25 23:26:59,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:26:59,254 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:26:59,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:26:59,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:26:59,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:26:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:26:59,460 INFO L85 PathProgramCache]: Analyzing trace with hash 967886684, now seen corresponding path program 6 times [2022-11-25 23:26:59,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:26:59,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677178106] [2022-11-25 23:26:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:26:59,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:26:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:26:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-25 23:26:59,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:26:59,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677178106] [2022-11-25 23:26:59,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677178106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:26:59,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347453577] [2022-11-25 23:26:59,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:26:59,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:26:59,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:26:59,735 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:26:59,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:26:59,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:26:59,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:26:59,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:26:59,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:26:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-25 23:26:59,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:27:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-25 23:27:00,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347453577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:27:00,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448953432] [2022-11-25 23:27:00,028 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:27:00,028 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:27:00,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:27:00,029 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:27:00,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:27:00,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:00,060 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:27:00,060 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 23:27:00,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:00,070 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 23:27:00,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:00,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 28 [2022-11-25 23:27:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:00,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:00,151 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:27:00,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-25 23:27:00,227 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 23:27:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:00,272 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 23:27:00,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:00,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:00,356 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 23:27:00,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:00,396 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-25 23:27:00,396 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 23:27:00,418 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 23:27:00,429 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 23:27:00,524 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-25 23:27:00,560 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:27:45,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2789#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_avg_~ret~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_36 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_36 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_36 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_36 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_36 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_36 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_36 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_36 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_36 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_36 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_36 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_36 10)) 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:27:45,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:27:45,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:27:45,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-11-25 23:27:45,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386724859] [2022-11-25 23:27:45,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:27:45,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:27:45,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:27:45,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:27:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=462, Unknown=12, NotChecked=0, Total=600 [2022-11-25 23:27:45,663 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 23:27:45,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:27:45,718 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-11-25 23:27:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:27:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 66 [2022-11-25 23:27:45,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:27:45,719 INFO L225 Difference]: With dead ends: 62 [2022-11-25 23:27:45,719 INFO L226 Difference]: Without dead ends: 44 [2022-11-25 23:27:45,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=126, Invalid=462, Unknown=12, NotChecked=0, Total=600 [2022-11-25 23:27:45,720 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:27:45,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:27:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-25 23:27:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-25 23:27:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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 23:27:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-25 23:27:45,727 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 66 [2022-11-25 23:27:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:27:45,727 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-25 23:27:45,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 23:27:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-25 23:27:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 23:27:45,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:27:45,730 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:27:45,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:27:45,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 23:27:45,936 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:27:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:27:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash 631878764, now seen corresponding path program 7 times [2022-11-25 23:27:45,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:27:45,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719167882] [2022-11-25 23:27:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:27:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:29:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 1 proven. 618 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 23:29:08,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:29:08,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719167882] [2022-11-25 23:29:08,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719167882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:29:08,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095328495] [2022-11-25 23:29:08,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:29:08,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:29:08,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:29:08,474 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:29:08,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06ce0375-49cf-49e7-bada-afa88462d3c7/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:29:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:29:08,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 262 conjunts are in the unsatisfiable core [2022-11-25 23:29:08,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:29:10,650 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 23:29:18,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:18,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:18,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:18,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:18,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:18,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:18,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:29:18,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 2289 treesize of output 611 [2022-11-25 23:29:36,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:29:36,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:36,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:29:36,565 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 23:29:36,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 4556 treesize of output 1159 [2022-11-25 23:29:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:40,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:40,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:40,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:40,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:40,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:40,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:29:40,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4317 treesize of output 1136 [2022-11-25 23:29:47,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:47,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:47,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:47,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:29:47,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4199 treesize of output 1136 [2022-11-25 23:29:50,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:29:50,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:29:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:50,398 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 23:29:50,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 4204 treesize of output 1159 [2022-11-25 23:29:54,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:29:54,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:29:54,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:54,050 INFO L321 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2022-11-25 23:29:54,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 4207 treesize of output 1162 [2022-11-25 23:29:57,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:57,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:57,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:57,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:57,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:57,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:29:57,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:29:57,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4199 treesize of output 1136 [2022-11-25 23:30:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:30:02,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:02,099 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 23:30:02,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 4204 treesize of output 1159 [2022-11-25 23:30:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:07,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:07,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:07,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:07,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:07,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:07,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:07,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:30:07,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4199 treesize of output 1136 [2022-11-25 23:30:15,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:15,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:15,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:15,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:15,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:15,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:15,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:15,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:15,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:15,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:30:15,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4199 treesize of output 1136 [2022-11-25 23:30:25,783 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:30:25,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:25,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:25,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:25,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:25,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:25,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:25,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:25,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:30:25,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:30:25,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 4193 treesize of output 1136 [2022-11-25 23:30:33,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:30:33,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 5167 treesize of output 1567 [2022-11-25 23:30:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 23:30:37,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 23:31:39,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095328495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:39,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187576180] [2022-11-25 23:31:39,329 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:31:39,330 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:39,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:39,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:39,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:31:39,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:39,364 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:31:39,365 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 23:31:39,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:39,374 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 23:31:39,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:39,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 28 [2022-11-25 23:31:39,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:39,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:31:39,463 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:31:39,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-25 23:31:39,522 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 23:31:39,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:39,573 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 23:31:39,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:39,657 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 23:31:39,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:31:39,713 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-25 23:31:39,714 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 23:31:39,762 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 23:31:39,773 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 23:31:39,871 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 12 for LOIs [2022-11-25 23:31:39,893 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:32:32,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3520#(and (<= 9 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_avg_~ret~0_BEFORE_RETURN_42 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_42 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_42 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_42 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_42 10)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_42 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_42 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_42 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_42 10)) 4294967296) (+ (mod (ite (and (not (= (mod v_avg_~ret~0_BEFORE_RETURN_42 10) 0)) (< v_avg_~ret~0_BEFORE_RETURN_42 0)) (+ (div v_avg_~ret~0_BEFORE_RETURN_42 10) 1) (div v_avg_~ret~0_BEFORE_RETURN_42 10)) 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 36 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:32:32,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:32:32,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:32:32,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 41, 31] total 119 [2022-11-25 23:32:32,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756604444] [2022-11-25 23:32:32,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:32,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-25 23:32:32,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-25 23:32:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=16789, Unknown=13, NotChecked=0, Total=17292 [2022-11-25 23:32:32,234 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 119 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 110 states have internal predecessors, (120), 9 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 23:32:44,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:16,954 WARN L233 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 180 DAG size of output: 133 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:35:00,511 WARN L233 SmtUtils]: Spent 45.19s on a formula simplification. DAG size of input: 711 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:36:47,733 WARN L233 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 687 DAG size of output: 182 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)