./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/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_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/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_87bb7933-7158-4040-9de0-ceda2cfd0f7d/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 ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 --- 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 [2022-11-26 00:33:59,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:33:59,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:33:59,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:33:59,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:33:59,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:33:59,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:33:59,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:33:59,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:33:59,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:33:59,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:33:59,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:33:59,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:33:59,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:33:59,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:33:59,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:33:59,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:33:59,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:33:59,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:33:59,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:34:00,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:34:00,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:34:00,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:34:00,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:34:00,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:34:00,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:34:00,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:34:00,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:34:00,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:34:00,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:34:00,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:34:00,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:34:00,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:34:00,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:34:00,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:34:00,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:34:00,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:34:00,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:34:00,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:34:00,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:34:00,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:34:00,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:34:00,065 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:34:00,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:34:00,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:34:00,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:34:00,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:34:00,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:34:00,068 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:34:00,068 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:34:00,068 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:34:00,068 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:34:00,069 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:34:00,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:34:00,070 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:34:00,070 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:34:00,070 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:34:00,070 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:34:00,071 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:34:00,071 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:34:00,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:34:00,072 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:34:00,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:34:00,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:34:00,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:34:00,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:34:00,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:34:00,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:34:00,074 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:34:00,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:34:00,075 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:34:00,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:34:00,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:34:00,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:34:00,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:34:00,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:34:00,076 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:34:00,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:34:00,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:34:00,077 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:34:00,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:34:00,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:34:00,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:34:00,078 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_87bb7933-7158-4040-9de0-ceda2cfd0f7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 [2022-11-26 00:34:00,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:34:00,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:34:00,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:34:00,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:34:00,406 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:34:00,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-crafted/bAnd1.i [2022-11-26 00:34:03,462 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:34:03,660 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:34:03,661 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/sv-benchmarks/c/array-crafted/bAnd1.i [2022-11-26 00:34:03,667 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/data/e712e70c8/50db4124f8454bb5be7dc7d07691723a/FLAG4a4c85397 [2022-11-26 00:34:03,680 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/data/e712e70c8/50db4124f8454bb5be7dc7d07691723a [2022-11-26 00:34:03,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:34:03,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:34:03,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:34:03,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:34:03,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:34:03,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:34:03" (1/1) ... [2022-11-26 00:34:03,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1517c65f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:03, skipping insertion in model container [2022-11-26 00:34:03,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:34:03" (1/1) ... [2022-11-26 00:34:03,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:34:03,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:34:03,948 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_87bb7933-7158-4040-9de0-ceda2cfd0f7d/sv-benchmarks/c/array-crafted/bAnd1.i[1290,1303] [2022-11-26 00:34:03,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:34:03,963 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:34:04,012 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_87bb7933-7158-4040-9de0-ceda2cfd0f7d/sv-benchmarks/c/array-crafted/bAnd1.i[1290,1303] [2022-11-26 00:34:04,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:34:04,032 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:34:04,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04 WrapperNode [2022-11-26 00:34:04,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:34:04,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:34:04,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:34:04,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:34:04,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,075 INFO L138 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2022-11-26 00:34:04,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:34:04,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:34:04,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:34:04,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:34:04,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:34:04,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:34:04,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:34:04,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:34:04,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (1/1) ... [2022-11-26 00:34:04,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:34:04,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:04,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:34:04,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:34:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:34:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:34:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:34:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:34:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-11-26 00:34:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-11-26 00:34:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:34:04,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:34:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:34:04,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:34:04,292 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:34:04,294 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:34:04,491 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:34:04,561 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:34:04,562 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:34:04,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:34:04 BoogieIcfgContainer [2022-11-26 00:34:04,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:34:04,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:34:04,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:34:04,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:34:04,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:34:03" (1/3) ... [2022-11-26 00:34:04,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4985f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:34:04, skipping insertion in model container [2022-11-26 00:34:04,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:34:04" (2/3) ... [2022-11-26 00:34:04,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4985f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:34:04, skipping insertion in model container [2022-11-26 00:34:04,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:34:04" (3/3) ... [2022-11-26 00:34:04,573 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2022-11-26 00:34:04,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:34:04,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:34:04,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:34:04,660 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;@89ecc81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:34:04,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:34:04,670 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) [2022-11-26 00:34:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:34:04,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:04,679 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:04,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:04,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2101917932, now seen corresponding path program 1 times [2022-11-26 00:34:04,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:04,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789380025] [2022-11-26 00:34:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:04,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:34:05,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:05,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789380025] [2022-11-26 00:34:05,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789380025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:05,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:05,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:34:05,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040120153] [2022-11-26 00:34:05,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:05,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:05,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:05,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:05,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:05,104 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) [2022-11-26 00:34:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:05,159 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-26 00:34:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:05,162 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 [2022-11-26 00:34:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:05,170 INFO L225 Difference]: With dead ends: 33 [2022-11-26 00:34:05,170 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:34:05,173 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 [2022-11-26 00:34:05,177 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:05,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:34:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:34:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-26 00:34:05,206 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) [2022-11-26 00:34:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-26 00:34:05,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-26 00:34:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:05,208 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-26 00:34:05,209 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) [2022-11-26 00:34:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-26 00:34:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:34:05,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:05,210 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:05,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:34:05,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2075292739, now seen corresponding path program 1 times [2022-11-26 00:34:05,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:05,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994564599] [2022-11-26 00:34:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:34:05,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:05,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994564599] [2022-11-26 00:34:05,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994564599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:05,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431620702] [2022-11-26 00:34:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:05,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:05,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:05,418 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:05,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:34:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:05,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:34:05,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:34:05,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:34:05,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431620702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:05,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:34:05,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 00:34:05,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417174133] [2022-11-26 00:34:05,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:05,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:05,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:34:05,614 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) [2022-11-26 00:34:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:05,638 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-26 00:34:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:05,639 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 [2022-11-26 00:34:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:05,640 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:34:05,640 INFO L226 Difference]: Without dead ends: 17 [2022-11-26 00:34:05,641 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 [2022-11-26 00:34:05,641 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 [2022-11-26 00:34:05,642 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] [2022-11-26 00:34:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-26 00:34:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-26 00:34:05,646 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) [2022-11-26 00:34:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-26 00:34:05,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-26 00:34:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:05,648 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-26 00:34:05,648 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) [2022-11-26 00:34:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-26 00:34:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:34:05,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:05,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:05,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:05,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:05,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash 345149304, now seen corresponding path program 1 times [2022-11-26 00:34:05,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:05,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276246474] [2022-11-26 00:34:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:05,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:34:05,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276246474] [2022-11-26 00:34:05,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276246474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955682224] [2022-11-26 00:34:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:05,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:05,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:05,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:05,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:34:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:06,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:34:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:34:06,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:34:06,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955682224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:06,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:34:06,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 00:34:06,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323076039] [2022-11-26 00:34:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:06,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:06,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:06,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:34:06,108 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) [2022-11-26 00:34:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:06,148 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-26 00:34:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:06,148 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 [2022-11-26 00:34:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:06,149 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:34:06,149 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:34:06,150 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 [2022-11-26 00:34:06,151 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 [2022-11-26 00:34:06,152 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] [2022-11-26 00:34:06,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:34:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-26 00:34:06,155 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) [2022-11-26 00:34:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-26 00:34:06,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-26 00:34:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:06,158 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-26 00:34:06,158 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) [2022-11-26 00:34:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-26 00:34:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:34:06,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:06,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:06,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:06,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:06,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:06,367 INFO L85 PathProgramCache]: Analyzing trace with hash 982315323, now seen corresponding path program 1 times [2022-11-26 00:34:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:06,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328946077] [2022-11-26 00:34:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:06,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:34:06,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:06,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328946077] [2022-11-26 00:34:06,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328946077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:06,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211435673] [2022-11-26 00:34:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:06,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:06,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:06,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:06,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:34:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:06,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:34:06,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:34:06,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:34:06,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211435673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:06,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489471556] [2022-11-26 00:34:06,748 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:34:06,749 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:06,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:06,758 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:06,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:06,896 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:34:06,897 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 [2022-11-26 00:34:06,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:06,922 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 [2022-11-26 00:34:06,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:06,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:34:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:07,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:07,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:07,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:07,256 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:34:07,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-11-26 00:34:07,462 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 [2022-11-26 00:34:07,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:07,685 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 [2022-11-26 00:34:07,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:07,815 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 [2022-11-26 00:34:07,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:07,879 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 00:34:07,880 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 [2022-11-26 00:34:07,929 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 [2022-11-26 00:34:07,942 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 [2022-11-26 00:34:08,092 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:34:08,197 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:11,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bAnd_~res~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_5 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_5 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_5 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:11,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:11,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:11,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-26 00:34:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837010691] [2022-11-26 00:34:11,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:11,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:34:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:11,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:34:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:34:11,307 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) [2022-11-26 00:34:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:11,351 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-26 00:34:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:34:11,351 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 [2022-11-26 00:34:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:11,353 INFO L225 Difference]: With dead ends: 36 [2022-11-26 00:34:11,353 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 00:34:11,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:34:11,356 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 [2022-11-26 00:34:11,357 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] [2022-11-26 00:34:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 00:34:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-26 00:34:11,365 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) [2022-11-26 00:34:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-26 00:34:11,368 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-26 00:34:11,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:11,369 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-26 00:34:11,369 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) [2022-11-26 00:34:11,369 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-26 00:34:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:34:11,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:11,371 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:11,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:11,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:11,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:11,577 INFO L85 PathProgramCache]: Analyzing trace with hash -362186972, now seen corresponding path program 2 times [2022-11-26 00:34:11,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:11,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794194496] [2022-11-26 00:34:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:11,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:34:11,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:11,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794194496] [2022-11-26 00:34:11,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794194496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:11,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669646670] [2022-11-26 00:34:11,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:34:11,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:11,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:11,667 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:11,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:34:11,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:34:11,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:11,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:34:11,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:34:11,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:34:11,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669646670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:11,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1961877664] [2022-11-26 00:34:11,813 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:34:11,813 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:11,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:11,814 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:11,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:11,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,861 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:34:11,861 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 [2022-11-26 00:34:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,875 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 [2022-11-26 00:34:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:34:11,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:11,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:12,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:12,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:12,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:12,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:12,046 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:34:12,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-11-26 00:34:12,125 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 [2022-11-26 00:34:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:12,257 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 [2022-11-26 00:34:12,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:12,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:12,369 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 [2022-11-26 00:34:12,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:12,413 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:34:12,413 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 [2022-11-26 00:34:12,441 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 [2022-11-26 00:34:12,453 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 [2022-11-26 00:34:12,596 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:34:12,677 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:19,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bAnd_~res~0_BEFORE_RETURN_11 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_11 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_11 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_11 4294967296) (- 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-26 00:34:19,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:19,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:19,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 00:34:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675883578] [2022-11-26 00:34:19,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:19,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:34:19,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:34:19,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:34:19,694 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) [2022-11-26 00:34:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:19,725 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-26 00:34:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:34:19,725 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 [2022-11-26 00:34:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:19,726 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:34:19,726 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:34:19,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:34:19,727 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 [2022-11-26 00:34:19,727 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] [2022-11-26 00:34:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:34:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-26 00:34:19,731 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) [2022-11-26 00:34:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-26 00:34:19,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-26 00:34:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:19,733 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-26 00:34:19,733 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) [2022-11-26 00:34:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-26 00:34:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:34:19,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:19,734 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:19,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:19,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1830383229, now seen corresponding path program 3 times [2022-11-26 00:34:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:19,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342213336] [2022-11-26 00:34:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-26 00:34:20,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:20,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342213336] [2022-11-26 00:34:20,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342213336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:20,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163148725] [2022-11-26 00:34:20,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:34:20,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:20,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:20,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:20,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:34:20,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:34:20,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:20,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:34:20,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-26 00:34:20,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-26 00:34:20,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163148725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788360465] [2022-11-26 00:34:20,374 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:34:20,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:20,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:20,375 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:20,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:20,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,407 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:34:20,408 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 [2022-11-26 00:34:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,439 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:34:20,440 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 [2022-11-26 00:34:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:34:20,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:20,589 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:34:20,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-11-26 00:34:20,684 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 [2022-11-26 00:34:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,812 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 [2022-11-26 00:34:20,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:20,911 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 [2022-11-26 00:34:20,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:20,949 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:34:20,950 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 [2022-11-26 00:34:20,978 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 [2022-11-26 00:34:20,988 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 [2022-11-26 00:34:21,095 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:34:21,197 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:26,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bAnd_~res~0_BEFORE_RETURN_17 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_17 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_17 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_17 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:26,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:26,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:26,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-11-26 00:34:26,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607730121] [2022-11-26 00:34:26,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:26,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:34:26,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:26,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:34:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:34:26,240 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:34:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:26,298 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-26 00:34:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:34:26,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-11-26 00:34:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:26,299 INFO L225 Difference]: With dead ends: 49 [2022-11-26 00:34:26,299 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 00:34:26,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:34:26,301 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:26,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:34:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 00:34:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-26 00:34:26,305 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) [2022-11-26 00:34:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-26 00:34:26,306 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-26 00:34:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:26,306 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-26 00:34:26,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:34:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-26 00:34:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 00:34:26,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:26,308 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:26,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:26,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:34:26,514 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1982544532, now seen corresponding path program 4 times [2022-11-26 00:34:26,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:26,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502840151] [2022-11-26 00:34:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:26,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:34:26,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502840151] [2022-11-26 00:34:26,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502840151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:26,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600325134] [2022-11-26 00:34:26,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:34:26,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:26,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:26,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:34:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:27,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:34:27,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:34:27,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:34:27,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600325134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:27,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824543415] [2022-11-26 00:34:27,367 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:34:27,367 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:27,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:27,368 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:27,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,405 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:34:27,405 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 [2022-11-26 00:34:27,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,421 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 [2022-11-26 00:34:27,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:34:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,570 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:34:27,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-11-26 00:34:27,654 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 [2022-11-26 00:34:27,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,755 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 [2022-11-26 00:34:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:27,848 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 [2022-11-26 00:34:27,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:27,895 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:34:27,895 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 [2022-11-26 00:34:27,919 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 [2022-11-26 00:34:27,933 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 [2022-11-26 00:34:28,038 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:34:28,181 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:35,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:35,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:35,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:35,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-11-26 00:34:35,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350099832] [2022-11-26 00:34:35,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:35,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:34:35,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:34:35,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-11-26 00:34:35,224 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:34:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:35,293 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-26 00:34:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:34:35,293 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-26 00:34:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:35,294 INFO L225 Difference]: With dead ends: 62 [2022-11-26 00:34:35,294 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 00:34:35,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-11-26 00:34:35,296 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:35,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:34:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 00:34:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-26 00:34:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:34:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-26 00:34:35,302 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-11-26 00:34:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:35,302 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-26 00:34:35,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:34:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-26 00:34:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-26 00:34:35,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:35,304 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:35,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:35,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:35,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:35,521 INFO L85 PathProgramCache]: Analyzing trace with hash -374522196, now seen corresponding path program 5 times [2022-11-26 00:34:35,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:35,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530880569] [2022-11-26 00:34:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:35,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:34:36,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:36,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530880569] [2022-11-26 00:34:36,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530880569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:36,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475261825] [2022-11-26 00:34:36,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:34:36,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:36,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:36,404 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:36,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:34:36,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:34:36,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:34:36,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-26 00:34:36,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-26 00:34:36,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475261825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27111062] [2022-11-26 00:34:36,758 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:34:36,758 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:36,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:36,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:36,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:36,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,805 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:34:36,806 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 [2022-11-26 00:34:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,833 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:34:36,833 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 [2022-11-26 00:34:36,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:34:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:36,984 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:34:36,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-11-26 00:34:37,038 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 [2022-11-26 00:34:37,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:37,129 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 [2022-11-26 00:34:37,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:37,232 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 [2022-11-26 00:34:37,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:37,289 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-26 00:34:37,289 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 [2022-11-26 00:34:37,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:34:37,355 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 [2022-11-26 00:34:37,471 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:34:37,569 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:38,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bAnd_~res~0_BEFORE_RETURN_29 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_29 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_29 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_29 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:38,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:38,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:38,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-11-26 00:34:38,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922383250] [2022-11-26 00:34:38,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:38,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:34:38,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:38,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:34:38,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:34:38,837 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:34:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:38,961 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-26 00:34:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-26 00:34:38,964 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-11-26 00:34:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:38,964 INFO L225 Difference]: With dead ends: 69 [2022-11-26 00:34:38,965 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 00:34:38,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:34:38,966 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:38,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:34:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 00:34:38,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-26 00:34:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:34:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-26 00:34:38,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-11-26 00:34:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:38,982 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-26 00:34:38,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:34:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-26 00:34:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:34:38,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:38,984 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:38,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:39,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:39,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:39,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:39,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1171460189, now seen corresponding path program 6 times [2022-11-26 00:34:39,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:39,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624957112] [2022-11-26 00:34:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:39,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:34:40,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:40,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624957112] [2022-11-26 00:34:40,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624957112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:40,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355512732] [2022-11-26 00:34:40,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:34:40,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:40,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:40,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:40,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:34:40,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:34:40,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:40,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:34:40,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:34:40,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:34:41,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355512732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:41,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749638774] [2022-11-26 00:34:41,458 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:34:41,458 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:41,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:41,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:41,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,490 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:34:41,491 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 [2022-11-26 00:34:41,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,518 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:34:41,518 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 [2022-11-26 00:34:41,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:34:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,675 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:34:41,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-11-26 00:34:41,725 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 [2022-11-26 00:34:41,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,804 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 [2022-11-26 00:34:41,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,882 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 [2022-11-26 00:34:41,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:41,959 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 00:34:41,960 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 [2022-11-26 00:34:42,004 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 [2022-11-26 00:34:42,014 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 [2022-11-26 00:34:42,123 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:34:42,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:47,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:47,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:47,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:47,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-11-26 00:34:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309485336] [2022-11-26 00:34:47,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-26 00:34:47,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-26 00:34:47,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=2697, Unknown=1, NotChecked=0, Total=4032 [2022-11-26 00:34:47,402 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:34:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:47,514 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-11-26 00:34:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-26 00:34:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-11-26 00:34:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:47,516 INFO L225 Difference]: With dead ends: 100 [2022-11-26 00:34:47,516 INFO L226 Difference]: Without dead ends: 75 [2022-11-26 00:34:47,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1334, Invalid=2697, Unknown=1, NotChecked=0, Total=4032 [2022-11-26 00:34:47,518 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:47,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:34:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-26 00:34:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-26 00:34:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:34:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-26 00:34:47,526 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2022-11-26 00:34:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:47,527 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-26 00:34:47,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:34:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-26 00:34:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-26 00:34:47,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:47,529 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:47,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:47,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:34:47,736 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash 524161260, now seen corresponding path program 7 times [2022-11-26 00:34:47,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:47,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081043365] [2022-11-26 00:34:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:47,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:34:50,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:50,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081043365] [2022-11-26 00:34:50,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081043365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:50,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824243903] [2022-11-26 00:34:50,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:34:50,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:50,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:50,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:50,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:34:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:34:51,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:34:51,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:34:54,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824243903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:54,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1272181822] [2022-11-26 00:34:54,434 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:34:54,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:54,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:54,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:54,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,470 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:34:54,471 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 [2022-11-26 00:34:54,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,488 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 [2022-11-26 00:34:54,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:34:54,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:54,633 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:34:54,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-11-26 00:34:54,726 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 [2022-11-26 00:34:54,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,809 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 [2022-11-26 00:34:54,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:54,893 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 [2022-11-26 00:34:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:54,936 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:34:54,936 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 [2022-11-26 00:34:54,962 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 [2022-11-26 00:34:54,971 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 [2022-11-26 00:34:55,087 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:34:55,172 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:34:58,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (exists ((v_bAnd_~res~0_BEFORE_RETURN_42 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_42 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_42 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_42 4294967296) (- 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:58,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:58,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:58,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2022-11-26 00:34:58,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704806426] [2022-11-26 00:34:58,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:58,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-26 00:34:58,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-26 00:34:58,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:34:58,629 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:34:58,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:58,846 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2022-11-26 00:34:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-26 00:34:58,847 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2022-11-26 00:34:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:58,851 INFO L225 Difference]: With dead ends: 150 [2022-11-26 00:34:58,851 INFO L226 Difference]: Without dead ends: 125 [2022-11-26 00:34:58,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:34:58,858 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:58,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:34:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-26 00:34:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-26 00:34:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:34:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-11-26 00:34:58,886 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2022-11-26 00:34:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:58,888 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-11-26 00:34:58,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:34:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-11-26 00:34:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-26 00:34:58,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:58,898 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:58,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:59,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:34:59,109 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1169219380, now seen corresponding path program 8 times [2022-11-26 00:34:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149707299] [2022-11-26 00:34:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:59,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:35:07,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:07,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149707299] [2022-11-26 00:35:07,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149707299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:07,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446689543] [2022-11-26 00:35:07,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:35:07,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:07,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:07,272 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:07,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:35:07,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:35:07,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:35:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:35:07,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2022-11-26 00:35:07,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2022-11-26 00:35:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446689543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:07,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692171666] [2022-11-26 00:35:07,826 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:35:07,826 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:07,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:07,827 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:07,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:07,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,853 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:35:07,854 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 [2022-11-26 00:35:07,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,881 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:35:07,881 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 [2022-11-26 00:35:07,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:35:07,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:08,019 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:35:08,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-11-26 00:35:08,076 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 [2022-11-26 00:35:08,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:08,167 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 [2022-11-26 00:35:08,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:08,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:08,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:35:08,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:08,290 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:35:08,291 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 [2022-11-26 00:35:08,311 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 [2022-11-26 00:35:08,322 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 [2022-11-26 00:35:08,419 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:35:08,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:12,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:12,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:12,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:12,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2022-11-26 00:35:12,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245733670] [2022-11-26 00:35:12,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:12,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-26 00:35:12,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-26 00:35:12,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2022-11-26 00:35:12,747 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:35:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:12,937 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-11-26 00:35:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-26 00:35:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-26 00:35:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:12,939 INFO L225 Difference]: With dead ends: 155 [2022-11-26 00:35:12,940 INFO L226 Difference]: Without dead ends: 130 [2022-11-26 00:35:12,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2022-11-26 00:35:12,944 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:12,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:35:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-26 00:35:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-26 00:35:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:35:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-11-26 00:35:12,957 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2022-11-26 00:35:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:12,958 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-11-26 00:35:12,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:35:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-11-26 00:35:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-26 00:35:12,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:12,961 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:12,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:13,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:13,171 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash 250932387, now seen corresponding path program 9 times [2022-11-26 00:35:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:13,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796109559] [2022-11-26 00:35:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 00:35:20,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:20,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796109559] [2022-11-26 00:35:20,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796109559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:20,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744260120] [2022-11-26 00:35:20,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:35:20,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:20,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:20,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:35:20,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:35:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:35:20,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-26 00:35:20,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 00:35:20,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 00:35:25,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744260120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460669642] [2022-11-26 00:35:25,606 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:35:25,606 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:25,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:25,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:25,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:25,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,635 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:35:25,635 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 [2022-11-26 00:35:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,644 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 [2022-11-26 00:35:25,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:35:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,783 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:35:25,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-11-26 00:35:25,832 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 [2022-11-26 00:35:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,909 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 [2022-11-26 00:35:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:25,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:25,988 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 [2022-11-26 00:35:26,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:26,021 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:35:26,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:35:26,042 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 [2022-11-26 00:35:26,052 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 [2022-11-26 00:35:26,151 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:35:26,212 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:30,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7025#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (exists ((v_bAnd_~res~0_BEFORE_RETURN_53 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_53 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_53 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_53 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:30,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:30,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:30,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 103 [2022-11-26 00:35:30,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904640792] [2022-11-26 00:35:30,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:30,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-26 00:35:30,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-26 00:35:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5313, Invalid=8027, Unknown=0, NotChecked=0, Total=13340 [2022-11-26 00:35:30,381 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:35:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:30,573 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-11-26 00:35:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-26 00:35:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2022-11-26 00:35:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:30,575 INFO L225 Difference]: With dead ends: 160 [2022-11-26 00:35:30,575 INFO L226 Difference]: Without dead ends: 131 [2022-11-26 00:35:30,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 100 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6788 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=5313, Invalid=8027, Unknown=0, NotChecked=0, Total=13340 [2022-11-26 00:35:30,578 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:30,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:35:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-26 00:35:30,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-26 00:35:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:35:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-11-26 00:35:30,589 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 155 [2022-11-26 00:35:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:30,590 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-11-26 00:35:30,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:35:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-11-26 00:35:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-26 00:35:30,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:30,593 INFO L195 NwaCegarLoop]: trace histogram [100, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:30,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:30,800 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -329023124, now seen corresponding path program 10 times [2022-11-26 00:35:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229328866] [2022-11-26 00:35:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:30,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-26 00:35:31,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229328866] [2022-11-26 00:35:31,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229328866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509916083] [2022-11-26 00:35:31,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:35:31,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:31,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:31,487 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:31,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:35:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:31,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:35:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-26 00:35:31,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-26 00:35:32,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509916083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:32,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [994543589] [2022-11-26 00:35:32,183 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:35:32,184 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:32,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:32,184 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:32,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:32,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,218 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:35:32,218 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 [2022-11-26 00:35:32,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,229 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 [2022-11-26 00:35:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:35:32,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:32,363 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:35:32,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-11-26 00:35:32,454 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 [2022-11-26 00:35:32,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,537 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 [2022-11-26 00:35:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:32,612 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 [2022-11-26 00:35:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:32,647 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:35:32,648 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 [2022-11-26 00:35:32,668 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 [2022-11-26 00:35:32,679 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 [2022-11-26 00:35:32,771 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:35:32,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:33,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8552#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (exists ((v_bAnd_~res~0_BEFORE_RETURN_59 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_59 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_59 4294967296) (+ (- 4294967296) (mod v_bAnd_~res~0_BEFORE_RETURN_59 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:33,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:33,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:33,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-26 00:35:33,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719401044] [2022-11-26 00:35:33,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:35:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:35:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:35:33,831 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:33,874 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2022-11-26 00:35:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:35:33,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2022-11-26 00:35:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:33,876 INFO L225 Difference]: With dead ends: 171 [2022-11-26 00:35:33,876 INFO L226 Difference]: Without dead ends: 143 [2022-11-26 00:35:33,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:35:33,877 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:33,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:35:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-26 00:35:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-26 00:35:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:35:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-11-26 00:35:33,887 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 156 [2022-11-26 00:35:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:33,888 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-11-26 00:35:33,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-11-26 00:35:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-26 00:35:33,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:33,891 INFO L195 NwaCegarLoop]: trace histogram [100, 66, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:33,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:34,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:35:34,099 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:34,100 INFO L85 PathProgramCache]: Analyzing trace with hash 577880876, now seen corresponding path program 11 times [2022-11-26 00:35:34,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:34,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261867329] [2022-11-26 00:35:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:34,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 6110 trivial. 0 not checked. [2022-11-26 00:35:35,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:35,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261867329] [2022-11-26 00:35:35,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261867329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:35,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882481670] [2022-11-26 00:35:35,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:35:35,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:35,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:35,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:35,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:35:36,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:35:36,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:35:36,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:35:36,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 1062 proven. 21 refuted. 0 times theorem prover too weak. 6340 trivial. 0 not checked. [2022-11-26 00:35:36,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7402 trivial. 0 not checked. [2022-11-26 00:35:36,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882481670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:36,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906699178] [2022-11-26 00:35:36,358 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:35:36,358 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:36,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:36,359 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:36,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:36,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,394 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:35:36,395 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 [2022-11-26 00:35:36,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,419 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:35:36,420 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 [2022-11-26 00:35:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:35:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:36,587 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:35:36,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-11-26 00:35:36,674 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 [2022-11-26 00:35:36,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,757 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 [2022-11-26 00:35:36,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:36,836 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 [2022-11-26 00:35:36,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:36,913 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:35:36,913 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 [2022-11-26 00:35:36,936 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 [2022-11-26 00:35:36,946 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 [2022-11-26 00:35:37,041 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:35:37,103 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:38,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10355#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (exists ((v_bAnd_~res~0_BEFORE_RETURN_66 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_66 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_66 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_66 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:38,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:38,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:38,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-11-26 00:35:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045795368] [2022-11-26 00:35:38,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:38,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 00:35:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:38,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 00:35:38,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:35:38,335 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:35:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:38,428 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2022-11-26 00:35:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-26 00:35:38,429 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 192 [2022-11-26 00:35:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:38,430 INFO L225 Difference]: With dead ends: 192 [2022-11-26 00:35:38,430 INFO L226 Difference]: Without dead ends: 152 [2022-11-26 00:35:38,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:35:38,432 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:38,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:35:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-26 00:35:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-26 00:35:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:35:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-11-26 00:35:38,443 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 192 [2022-11-26 00:35:38,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:38,443 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-11-26 00:35:38,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:35:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-11-26 00:35:38,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-26 00:35:38,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:38,447 INFO L195 NwaCegarLoop]: trace histogram [100, 69, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:38,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:38,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:35:38,659 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1467613167, now seen corresponding path program 12 times [2022-11-26 00:35:38,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:38,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584904209] [2022-11-26 00:35:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-26 00:35:40,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584904209] [2022-11-26 00:35:40,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584904209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487029123] [2022-11-26 00:35:40,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:35:40,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:40,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:40,089 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:40,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:35:40,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:35:40,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:35:40,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:35:40,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 1154 proven. 276 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-26 00:35:40,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-26 00:35:41,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487029123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:41,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396541570] [2022-11-26 00:35:41,577 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:35:41,577 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:41,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:41,577 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:41,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:41,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,610 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:35:41,611 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 [2022-11-26 00:35:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,623 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 [2022-11-26 00:35:41,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:35:41,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:41,776 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:35:41,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-11-26 00:35:41,863 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 [2022-11-26 00:35:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:41,946 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 [2022-11-26 00:35:42,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:42,021 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 [2022-11-26 00:35:42,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:42,072 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-26 00:35:42,072 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 [2022-11-26 00:35:42,122 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 [2022-11-26 00:35:42,132 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 [2022-11-26 00:35:42,223 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:35:42,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:45,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12296#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bAnd_~res~0_BEFORE_RETURN_72 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_72 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_72 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_72 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:45,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:45,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:35:45,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-11-26 00:35:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125606121] [2022-11-26 00:35:45,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:45,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-26 00:35:45,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-26 00:35:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:35:45,447 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:45,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:35:45,549 INFO L93 Difference]: Finished difference Result 226 states and 260 transitions. [2022-11-26 00:35:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-26 00:35:45,549 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 203 [2022-11-26 00:35:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:35:45,551 INFO L225 Difference]: With dead ends: 226 [2022-11-26 00:35:45,551 INFO L226 Difference]: Without dead ends: 177 [2022-11-26 00:35:45,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:35:45,553 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:35:45,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:35:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-26 00:35:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-26 00:35:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:35:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-11-26 00:35:45,564 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 203 [2022-11-26 00:35:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:35:45,564 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-11-26 00:35:45,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:35:45,565 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-11-26 00:35:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-26 00:35:45,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:35:45,569 INFO L195 NwaCegarLoop]: trace histogram [144, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:35:45,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:35:45,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:45,778 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:35:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:35:45,779 INFO L85 PathProgramCache]: Analyzing trace with hash 976618444, now seen corresponding path program 13 times [2022-11-26 00:35:45,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:35:45,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917241402] [2022-11-26 00:35:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:35:45,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:35:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-26 00:35:49,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:35:49,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917241402] [2022-11-26 00:35:49,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917241402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:35:49,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643786096] [2022-11-26 00:35:49,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:35:49,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:35:49,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:35:49,747 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:35:49,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:35:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:35:50,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:35:50,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:35:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 4804 proven. 1176 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-26 00:35:50,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-26 00:35:53,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643786096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:35:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426318451] [2022-11-26 00:35:53,861 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:35:53,861 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:35:53,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:35:53,861 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:35:53,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:35:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:53,894 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:35:53,894 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 [2022-11-26 00:35:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:53,905 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 [2022-11-26 00:35:53,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:53,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:35:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:53,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:53,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:53,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:54,036 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:35:54,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-11-26 00:35:54,115 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 [2022-11-26 00:35:54,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:54,191 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 [2022-11-26 00:35:54,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:54,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:35:54,264 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 [2022-11-26 00:35:54,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:35:54,308 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:35:54,309 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 [2022-11-26 00:35:54,330 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 [2022-11-26 00:35:54,340 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 [2022-11-26 00:35:54,448 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:35:54,557 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:36:00,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14855#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bAnd_~res~0_BEFORE_RETURN_78 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_78 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_78 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_78 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:36:00,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:36:00,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:36:00,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-11-26 00:36:00,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261415951] [2022-11-26 00:36:00,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:36:00,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-26 00:36:00,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:36:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-26 00:36:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:36:00,047 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:36:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:00,242 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2022-11-26 00:36:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-26 00:36:00,243 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 278 [2022-11-26 00:36:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:00,245 INFO L225 Difference]: With dead ends: 301 [2022-11-26 00:36:00,245 INFO L226 Difference]: Without dead ends: 227 [2022-11-26 00:36:00,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:36:00,247 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:00,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:36:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-26 00:36:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-11-26 00:36:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:36:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2022-11-26 00:36:00,260 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 278 [2022-11-26 00:36:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:00,261 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2022-11-26 00:36:00,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:36:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2022-11-26 00:36:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-11-26 00:36:00,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:00,265 INFO L195 NwaCegarLoop]: trace histogram [294, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:36:00,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:36:00,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:36:00,475 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:36:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1824101484, now seen corresponding path program 14 times [2022-11-26 00:36:00,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:36:00,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432132063] [2022-11-26 00:36:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:36:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:36:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 24455 refuted. 0 times theorem prover too weak. 24662 trivial. 0 not checked. [2022-11-26 00:36:13,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:36:13,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432132063] [2022-11-26 00:36:13,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432132063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:36:13,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797747531] [2022-11-26 00:36:13,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:36:13,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:36:13,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:36:13,637 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:36:13,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:36:15,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-26 00:36:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:36:15,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:36:15,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:36:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 19606 proven. 105 refuted. 0 times theorem prover too weak. 29406 trivial. 0 not checked. [2022-11-26 00:36:16,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:36:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 49012 trivial. 0 not checked. [2022-11-26 00:36:17,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797747531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:36:17,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529412505] [2022-11-26 00:36:17,870 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:36:17,871 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:36:17,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:36:17,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:36:17,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:36:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:17,900 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:36:17,900 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 [2022-11-26 00:36:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:17,929 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:36:17,929 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 [2022-11-26 00:36:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:17,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:36:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:18,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:18,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:18,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:18,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:36:18,070 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:36:18,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-11-26 00:36:18,151 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 [2022-11-26 00:36:18,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:18,230 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 [2022-11-26 00:36:18,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:18,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:36:18,303 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 [2022-11-26 00:36:18,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:18,337 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:36:18,337 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 [2022-11-26 00:36:18,359 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 [2022-11-26 00:36:18,370 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 [2022-11-26 00:36:18,467 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:36:18,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:36:23,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18594#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (exists ((v_bAnd_~res~0_BEFORE_RETURN_84 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_84 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_84 4294967296) (+ (- 4294967296) (mod v_bAnd_~res~0_BEFORE_RETURN_84 4294967296))))) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:36:23,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:36:23,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:36:23,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 17, 17] total 131 [2022-11-26 00:36:23,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816721364] [2022-11-26 00:36:23,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:36:23,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-26 00:36:23,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:36:23,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-26 00:36:23,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-11-26 00:36:23,013 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:36:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:23,288 INFO L93 Difference]: Finished difference Result 368 states and 394 transitions. [2022-11-26 00:36:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-26 00:36:23,289 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 428 [2022-11-26 00:36:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:23,291 INFO L225 Difference]: With dead ends: 368 [2022-11-26 00:36:23,291 INFO L226 Difference]: Without dead ends: 244 [2022-11-26 00:36:23,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1241 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4808 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-11-26 00:36:23,294 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:23,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:36:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-26 00:36:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-11-26 00:36:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:36:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 248 transitions. [2022-11-26 00:36:23,308 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 248 transitions. Word has length 428 [2022-11-26 00:36:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:23,309 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 248 transitions. [2022-11-26 00:36:23,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:36:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 248 transitions. [2022-11-26 00:36:23,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-11-26 00:36:23,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:23,313 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:36:23,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-26 00:36:23,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:36:23,519 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:36:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:23,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1291712209, now seen corresponding path program 15 times [2022-11-26 00:36:23,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:36:23,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910862810] [2022-11-26 00:36:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:23,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:36:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:36:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-26 00:36:27,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:36:27,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910862810] [2022-11-26 00:36:27,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910862810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:36:27,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440282817] [2022-11-26 00:36:27,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:36:27,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:36:27,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:36:27,223 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:36:27,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:36:28,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:36:28,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:36:28,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 2438 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:36:28,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:36:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 20004 proven. 465 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-11-26 00:36:28,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:36:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-26 00:36:29,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440282817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:36:29,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850213330] [2022-11-26 00:36:29,613 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:36:29,613 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:36:29,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:36:29,614 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:36:29,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:36:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,645 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:36:29,645 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 [2022-11-26 00:36:29,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,676 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:36:29,677 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 [2022-11-26 00:36:29,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:36:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:36:29,814 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:36:29,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-11-26 00:36:29,895 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 [2022-11-26 00:36:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:29,966 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 [2022-11-26 00:36:30,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:30,038 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 [2022-11-26 00:36:30,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:30,092 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 00:36:30,092 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 [2022-11-26 00:36:30,140 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 [2022-11-26 00:36:30,150 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 [2022-11-26 00:36:30,237 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:36:30,361 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:36:31,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22549#(and (exists ((v_bAnd_~res~0_BEFORE_RETURN_89 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_89 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_89 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_89 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:36:31,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:36:31,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:36:31,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-11-26 00:36:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484338268] [2022-11-26 00:36:31,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:36:31,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-26 00:36:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:36:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-26 00:36:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-11-26 00:36:31,645 INFO L87 Difference]: Start difference. First operand 244 states and 248 transitions. Second operand has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:36:31,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:31,763 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2022-11-26 00:36:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-26 00:36:31,770 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 447 [2022-11-26 00:36:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:31,772 INFO L225 Difference]: With dead ends: 383 [2022-11-26 00:36:31,772 INFO L226 Difference]: Without dead ends: 276 [2022-11-26 00:36:31,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1372 GetRequests, 1296 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-11-26 00:36:31,774 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:31,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:36:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-26 00:36:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-26 00:36:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:36:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-11-26 00:36:31,788 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 447 [2022-11-26 00:36:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:31,789 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-11-26 00:36:31,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:36:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-11-26 00:36:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-26 00:36:31,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:31,793 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 62, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:36:31,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:36:31,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:36:31,999 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:36:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash 883995439, now seen corresponding path program 16 times [2022-11-26 00:36:32,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:36:32,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577080978] [2022-11-26 00:36:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:32,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:36:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:36:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-26 00:36:39,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:36:39,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577080978] [2022-11-26 00:36:39,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577080978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:36:39,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089335498] [2022-11-26 00:36:39,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:36:39,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:36:39,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:36:39,407 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:36:39,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:36:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:36:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-26 00:36:40,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:36:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 20004 proven. 1953 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-11-26 00:36:40,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:36:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-26 00:36:44,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089335498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:36:44,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [822551950] [2022-11-26 00:36:44,487 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:36:44,487 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:36:44,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:36:44,487 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:36:44,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:36:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,518 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:36:44,518 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 [2022-11-26 00:36:44,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,550 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:36:44,550 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 [2022-11-26 00:36:44,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:36:44,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,682 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:36:44,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-11-26 00:36:44,730 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 [2022-11-26 00:36:44,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,801 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 [2022-11-26 00:36:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:36:44,873 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 [2022-11-26 00:36:44,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:44,913 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:36:44,914 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 [2022-11-26 00:36:44,935 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 [2022-11-26 00:36:44,945 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 [2022-11-26 00:36:45,031 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-11-26 00:36:45,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:36:46,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26829#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (exists ((v_bAnd_~res~0_BEFORE_RETURN_95 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_95 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_95 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_95 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:36:46,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:36:46,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:36:46,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 102 [2022-11-26 00:36:46,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635166518] [2022-11-26 00:36:46,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:36:46,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-26 00:36:46,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:36:46,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-26 00:36:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-11-26 00:36:46,862 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:36:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:47,088 INFO L93 Difference]: Finished difference Result 420 states and 461 transitions. [2022-11-26 00:36:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-26 00:36:47,089 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 479 [2022-11-26 00:36:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:47,091 INFO L225 Difference]: With dead ends: 420 [2022-11-26 00:36:47,092 INFO L226 Difference]: Without dead ends: 313 [2022-11-26 00:36:47,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1360 SyntacticMatches, 27 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-11-26 00:36:47,094 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:47,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:36:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-26 00:36:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-11-26 00:36:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0097402597402598) internal successors, (311), 308 states have internal predecessors, (311), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:36:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 317 transitions. [2022-11-26 00:36:47,110 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 317 transitions. Word has length 479 [2022-11-26 00:36:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:47,112 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 317 transitions. [2022-11-26 00:36:47,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:36:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 317 transitions. [2022-11-26 00:36:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-11-26 00:36:47,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:47,116 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 99, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:36:47,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:36:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87bb7933-7158-4040-9de0-ceda2cfd0f7d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:36:47,331 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:36:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash 891116708, now seen corresponding path program 17 times [2022-11-26 00:36:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:36:47,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327070517] [2022-11-26 00:36:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:47,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:47:05,470 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.