./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/kundu.cil.c --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_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/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_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/kundu.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/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_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/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 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb --- 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 00:02:06,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:02:06,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:02:06,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:02:06,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:02:06,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:02:06,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:02:06,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:02:06,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:02:06,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:02:06,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:02:06,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:02:06,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:02:06,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:02:06,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:02:06,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:02:06,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:02:06,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:02:06,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:02:06,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:02:06,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:02:06,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:02:06,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:02:06,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:02:06,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:02:06,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:02:06,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:02:06,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:02:06,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:02:06,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:02:06,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:02:06,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:02:06,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:02:06,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:02:06,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:02:06,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:02:06,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:02:06,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:02:06,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:02:06,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:02:06,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:02:06,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:02:07,017 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:02:07,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:02:07,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:02:07,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:02:07,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:02:07,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:02:07,020 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:02:07,021 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:02:07,021 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:02:07,021 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:02:07,022 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:02:07,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:02:07,023 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:02:07,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:02:07,023 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:02:07,024 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:02:07,024 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:02:07,024 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:02:07,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:02:07,025 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:02:07,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:02:07,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:02:07,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:02:07,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:02:07,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:02:07,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:02:07,027 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:02:07,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:02:07,027 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:02:07,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:02:07,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:02:07,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:02:07,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:02:07,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:02:07,029 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:02:07,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:02:07,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:02:07,030 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:02:07,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:02:07,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:02:07,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:02:07,031 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_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb [2022-11-26 00:02:07,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:02:07,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:02:07,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:02:07,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:02:07,316 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:02:07,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/systemc/kundu.cil.c [2022-11-26 00:02:10,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:02:10,652 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:02:10,653 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/sv-benchmarks/c/systemc/kundu.cil.c [2022-11-26 00:02:10,662 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/data/85660bf53/3017f48c351342f283872a9681536c4e/FLAGc459557d0 [2022-11-26 00:02:10,677 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/data/85660bf53/3017f48c351342f283872a9681536c4e [2022-11-26 00:02:10,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:02:10,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:02:10,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:02:10,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:02:10,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:02:10,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:10,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bfad4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10, skipping insertion in model container [2022-11-26 00:02:10,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:10,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:02:10,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:02:10,859 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_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2022-11-26 00:02:10,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:02:10,932 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:02:10,941 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_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2022-11-26 00:02:10,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:02:10,989 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:02:10,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10 WrapperNode [2022-11-26 00:02:10,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:02:10,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:02:10,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:02:10,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:02:10,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,037 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 315 [2022-11-26 00:02:11,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:02:11,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:02:11,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:02:11,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:02:11,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,064 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:02:11,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:02:11,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:02:11,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:02:11,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (1/1) ... [2022-11-26 00:02:11,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:02:11,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:11,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:02:11,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b54f4a1c-80dc-4dbb-aaf5-95055a36dfea/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:02:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:02:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2022-11-26 00:02:11,167 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2022-11-26 00:02:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-26 00:02:11,167 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-26 00:02:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-26 00:02:11,167 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-26 00:02:11,167 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-26 00:02:11,168 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-26 00:02:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-26 00:02:11,168 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-26 00:02:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-26 00:02:11,168 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-26 00:02:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:02:11,169 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-26 00:02:11,169 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-26 00:02:11,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:02:11,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:02:11,257 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:02:11,259 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:02:11,683 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:02:11,899 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:02:11,900 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-26 00:02:11,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:11 BoogieIcfgContainer [2022-11-26 00:02:11,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:02:11,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:02:11,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:02:11,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:02:11,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:02:10" (1/3) ... [2022-11-26 00:02:11,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bb7640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:11, skipping insertion in model container [2022-11-26 00:02:11,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:10" (2/3) ... [2022-11-26 00:02:11,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bb7640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:11, skipping insertion in model container [2022-11-26 00:02:11,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:11" (3/3) ... [2022-11-26 00:02:11,932 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2022-11-26 00:02:11,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:02:11,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:02:12,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:02:12,076 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;@5e3927a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:02:12,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:02:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:02:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:02:12,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:12,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:12,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash 515396759, now seen corresponding path program 1 times [2022-11-26 00:02:12,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:12,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499290126] [2022-11-26 00:02:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:12,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:12,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:12,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499290126] [2022-11-26 00:02:12,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499290126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:12,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:12,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:02:12,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704497633] [2022-11-26 00:02:12,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:12,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:02:12,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:02:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:02:12,510 INFO L87 Difference]: Start difference. First operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:02:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:12,891 INFO L93 Difference]: Finished difference Result 263 states and 391 transitions. [2022-11-26 00:02:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:02:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-11-26 00:02:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:12,905 INFO L225 Difference]: With dead ends: 263 [2022-11-26 00:02:12,905 INFO L226 Difference]: Without dead ends: 171 [2022-11-26 00:02:12,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:02:12,913 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 225 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:12,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 348 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:02:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-26 00:02:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2022-11-26 00:02:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.4308943089430894) internal successors, (176), 127 states have internal predecessors, (176), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-26 00:02:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 231 transitions. [2022-11-26 00:02:12,978 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 231 transitions. Word has length 39 [2022-11-26 00:02:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:12,979 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 231 transitions. [2022-11-26 00:02:12,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:02:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 231 transitions. [2022-11-26 00:02:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:02:12,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:12,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:12,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:02:12,983 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:12,984 INFO L85 PathProgramCache]: Analyzing trace with hash -456277928, now seen corresponding path program 1 times [2022-11-26 00:02:12,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:12,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101918723] [2022-11-26 00:02:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:12,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:13,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:13,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101918723] [2022-11-26 00:02:13,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101918723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:13,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:13,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:02:13,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775965909] [2022-11-26 00:02:13,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:13,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:02:13,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:02:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:02:13,118 INFO L87 Difference]: Start difference. First operand 165 states and 231 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:02:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:13,640 INFO L93 Difference]: Finished difference Result 693 states and 969 transitions. [2022-11-26 00:02:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:02:13,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-11-26 00:02:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:13,647 INFO L225 Difference]: With dead ends: 693 [2022-11-26 00:02:13,648 INFO L226 Difference]: Without dead ends: 508 [2022-11-26 00:02:13,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:02:13,651 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 474 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:13,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 533 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:02:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-26 00:02:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 389. [2022-11-26 00:02:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 298 states have (on average 1.4261744966442953) internal successors, (425), 303 states have internal predecessors, (425), 60 states have call successors, (60), 30 states have call predecessors, (60), 30 states have return successors, (60), 56 states have call predecessors, (60), 57 states have call successors, (60) [2022-11-26 00:02:13,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 545 transitions. [2022-11-26 00:02:13,725 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 545 transitions. Word has length 39 [2022-11-26 00:02:13,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:13,726 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 545 transitions. [2022-11-26 00:02:13,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:02:13,727 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 545 transitions. [2022-11-26 00:02:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:02:13,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:13,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:13,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:02:13,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:13,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2056247895, now seen corresponding path program 1 times [2022-11-26 00:02:13,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:13,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379166360] [2022-11-26 00:02:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:13,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:13,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:13,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379166360] [2022-11-26 00:02:13,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379166360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:13,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:13,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:02:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054311721] [2022-11-26 00:02:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:13,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:02:13,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:02:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:02:13,910 INFO L87 Difference]: Start difference. First operand 389 states and 545 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:02:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:14,092 INFO L93 Difference]: Finished difference Result 1011 states and 1419 transitions. [2022-11-26 00:02:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:02:14,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2022-11-26 00:02:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:14,103 INFO L225 Difference]: With dead ends: 1011 [2022-11-26 00:02:14,103 INFO L226 Difference]: Without dead ends: 628 [2022-11-26 00:02:14,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:02:14,115 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 90 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:14,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 445 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-26 00:02:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 607. [2022-11-26 00:02:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 463 states have (on average 1.4168466522678185) internal successors, (656), 476 states have internal predecessors, (656), 93 states have call successors, (93), 50 states have call predecessors, (93), 50 states have return successors, (93), 81 states have call predecessors, (93), 90 states have call successors, (93) [2022-11-26 00:02:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 842 transitions. [2022-11-26 00:02:14,198 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 842 transitions. Word has length 40 [2022-11-26 00:02:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:14,198 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 842 transitions. [2022-11-26 00:02:14,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:02:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 842 transitions. [2022-11-26 00:02:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:02:14,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:14,201 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:14,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:02:14,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:14,202 INFO L85 PathProgramCache]: Analyzing trace with hash -422160077, now seen corresponding path program 1 times [2022-11-26 00:02:14,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:14,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414131451] [2022-11-26 00:02:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:14,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:14,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:14,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414131451] [2022-11-26 00:02:14,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414131451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:14,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:14,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:14,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946400366] [2022-11-26 00:02:14,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:14,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:14,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:14,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:14,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:14,413 INFO L87 Difference]: Start difference. First operand 607 states and 842 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:02:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:14,804 INFO L93 Difference]: Finished difference Result 1710 states and 2394 transitions. [2022-11-26 00:02:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:02:14,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2022-11-26 00:02:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:14,812 INFO L225 Difference]: With dead ends: 1710 [2022-11-26 00:02:14,812 INFO L226 Difference]: Without dead ends: 1171 [2022-11-26 00:02:14,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:02:14,824 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 197 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:14,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 778 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-26 00:02:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1135. [2022-11-26 00:02:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 872 states have (on average 1.4094036697247707) internal successors, (1229), 895 states have internal predecessors, (1229), 168 states have call successors, (168), 93 states have call predecessors, (168), 94 states have return successors, (170), 147 states have call predecessors, (170), 165 states have call successors, (170) [2022-11-26 00:02:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1567 transitions. [2022-11-26 00:02:14,954 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1567 transitions. Word has length 50 [2022-11-26 00:02:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:14,956 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1567 transitions. [2022-11-26 00:02:14,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:02:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1567 transitions. [2022-11-26 00:02:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:02:14,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:14,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:14,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:02:14,966 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:14,967 INFO L85 PathProgramCache]: Analyzing trace with hash 705776509, now seen corresponding path program 1 times [2022-11-26 00:02:14,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:14,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026872926] [2022-11-26 00:02:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:14,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:15,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:15,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026872926] [2022-11-26 00:02:15,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026872926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:15,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:15,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:15,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664208309] [2022-11-26 00:02:15,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:15,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:15,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:15,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:15,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:15,204 INFO L87 Difference]: Start difference. First operand 1135 states and 1567 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:02:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:15,694 INFO L93 Difference]: Finished difference Result 3491 states and 4846 transitions. [2022-11-26 00:02:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:02:15,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2022-11-26 00:02:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:15,715 INFO L225 Difference]: With dead ends: 3491 [2022-11-26 00:02:15,716 INFO L226 Difference]: Without dead ends: 2362 [2022-11-26 00:02:15,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:02:15,721 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 336 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:15,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 251 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-11-26 00:02:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2065. [2022-11-26 00:02:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 1597 states have (on average 1.3994990607388853) internal successors, (2235), 1621 states have internal predecessors, (2235), 291 states have call successors, (291), 173 states have call predecessors, (291), 176 states have return successors, (297), 271 states have call predecessors, (297), 288 states have call successors, (297) [2022-11-26 00:02:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2823 transitions. [2022-11-26 00:02:15,931 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2823 transitions. Word has length 53 [2022-11-26 00:02:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:15,932 INFO L495 AbstractCegarLoop]: Abstraction has 2065 states and 2823 transitions. [2022-11-26 00:02:15,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:02:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2823 transitions. [2022-11-26 00:02:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:02:15,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:15,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:15,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:02:15,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:15,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2102794554, now seen corresponding path program 1 times [2022-11-26 00:02:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:15,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959344758] [2022-11-26 00:02:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:15,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:16,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:16,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959344758] [2022-11-26 00:02:16,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959344758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:16,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:16,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:02:16,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508213160] [2022-11-26 00:02:16,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:16,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:02:16,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:16,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:02:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:02:16,048 INFO L87 Difference]: Start difference. First operand 2065 states and 2823 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:02:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:16,380 INFO L93 Difference]: Finished difference Result 4741 states and 6485 transitions. [2022-11-26 00:02:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:02:16,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 54 [2022-11-26 00:02:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:16,394 INFO L225 Difference]: With dead ends: 4741 [2022-11-26 00:02:16,394 INFO L226 Difference]: Without dead ends: 2681 [2022-11-26 00:02:16,401 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 00:02:16,403 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 93 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:16,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 212 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2022-11-26 00:02:16,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2242. [2022-11-26 00:02:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1689 states have (on average 1.3457667258732977) internal successors, (2273), 1717 states have internal predecessors, (2273), 346 states have call successors, (346), 207 states have call predecessors, (346), 206 states have return successors, (343), 318 states have call predecessors, (343), 343 states have call successors, (343) [2022-11-26 00:02:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 2962 transitions. [2022-11-26 00:02:16,630 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 2962 transitions. Word has length 54 [2022-11-26 00:02:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:16,632 INFO L495 AbstractCegarLoop]: Abstraction has 2242 states and 2962 transitions. [2022-11-26 00:02:16,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:02:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 2962 transitions. [2022-11-26 00:02:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 00:02:16,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:16,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:16,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:02:16,635 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:16,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:16,635 INFO L85 PathProgramCache]: Analyzing trace with hash 493560610, now seen corresponding path program 1 times [2022-11-26 00:02:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:16,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003097991] [2022-11-26 00:02:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:16,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:16,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:16,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003097991] [2022-11-26 00:02:16,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003097991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:16,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:16,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:16,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415979024] [2022-11-26 00:02:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:16,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:16,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:16,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:16,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:16,816 INFO L87 Difference]: Start difference. First operand 2242 states and 2962 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:02:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:17,586 INFO L93 Difference]: Finished difference Result 6180 states and 8394 transitions. [2022-11-26 00:02:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:02:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-11-26 00:02:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:17,608 INFO L225 Difference]: With dead ends: 6180 [2022-11-26 00:02:17,608 INFO L226 Difference]: Without dead ends: 4169 [2022-11-26 00:02:17,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:02:17,615 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 400 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:17,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 623 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:02:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2022-11-26 00:02:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3198. [2022-11-26 00:02:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 2417 states have (on average 1.3475382705833678) internal successors, (3257), 2447 states have internal predecessors, (3257), 488 states have call successors, (488), 293 states have call predecessors, (488), 292 states have return successors, (485), 458 states have call predecessors, (485), 485 states have call successors, (485) [2022-11-26 00:02:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4230 transitions. [2022-11-26 00:02:18,001 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4230 transitions. Word has length 55 [2022-11-26 00:02:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:18,001 INFO L495 AbstractCegarLoop]: Abstraction has 3198 states and 4230 transitions. [2022-11-26 00:02:18,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:02:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4230 transitions. [2022-11-26 00:02:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:02:18,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:18,004 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:18,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:02:18,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:18,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 432913418, now seen corresponding path program 1 times [2022-11-26 00:02:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:18,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953379946] [2022-11-26 00:02:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:18,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:02:18,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:18,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953379946] [2022-11-26 00:02:18,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953379946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:18,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:18,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829520625] [2022-11-26 00:02:18,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:18,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:18,195 INFO L87 Difference]: Start difference. First operand 3198 states and 4230 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:02:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:19,191 INFO L93 Difference]: Finished difference Result 9896 states and 13111 transitions. [2022-11-26 00:02:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:02:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2022-11-26 00:02:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:19,228 INFO L225 Difference]: With dead ends: 9896 [2022-11-26 00:02:19,228 INFO L226 Difference]: Without dead ends: 6704 [2022-11-26 00:02:19,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:02:19,240 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 362 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:19,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 261 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2022-11-26 00:02:19,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 6126. [2022-11-26 00:02:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6126 states, 4617 states have (on average 1.327485380116959) internal successors, (6129), 4655 states have internal predecessors, (6129), 936 states have call successors, (936), 573 states have call predecessors, (936), 572 states have return successors, (933), 898 states have call predecessors, (933), 933 states have call successors, (933) [2022-11-26 00:02:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6126 states to 6126 states and 7998 transitions. [2022-11-26 00:02:20,021 INFO L78 Accepts]: Start accepts. Automaton has 6126 states and 7998 transitions. Word has length 57 [2022-11-26 00:02:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:20,021 INFO L495 AbstractCegarLoop]: Abstraction has 6126 states and 7998 transitions. [2022-11-26 00:02:20,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:02:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 6126 states and 7998 transitions. [2022-11-26 00:02:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-26 00:02:20,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:20,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:20,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:02:20,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2052776908, now seen corresponding path program 1 times [2022-11-26 00:02:20,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:20,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299406768] [2022-11-26 00:02:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:02:20,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299406768] [2022-11-26 00:02:20,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299406768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:20,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:20,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:02:20,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745145820] [2022-11-26 00:02:20,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:20,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:02:20,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:20,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:02:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:02:20,118 INFO L87 Difference]: Start difference. First operand 6126 states and 7998 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:02:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:21,966 INFO L93 Difference]: Finished difference Result 20396 states and 27116 transitions. [2022-11-26 00:02:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:02:21,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2022-11-26 00:02:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:22,059 INFO L225 Difference]: With dead ends: 20396 [2022-11-26 00:02:22,059 INFO L226 Difference]: Without dead ends: 14276 [2022-11-26 00:02:22,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:02:22,080 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 470 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:22,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 493 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14276 states. [2022-11-26 00:02:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14276 to 10725. [2022-11-26 00:02:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 8171 states have (on average 1.3402276343164852) internal successors, (10951), 8265 states have internal predecessors, (10951), 1543 states have call successors, (1543), 1011 states have call predecessors, (1543), 1010 states have return successors, (1632), 1449 states have call predecessors, (1632), 1540 states have call successors, (1632) [2022-11-26 00:02:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 14126 transitions. [2022-11-26 00:02:23,339 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 14126 transitions. Word has length 59 [2022-11-26 00:02:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:23,339 INFO L495 AbstractCegarLoop]: Abstraction has 10725 states and 14126 transitions. [2022-11-26 00:02:23,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:02:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 14126 transitions. [2022-11-26 00:02:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 00:02:23,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:23,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:23,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:02:23,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:23,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1805023809, now seen corresponding path program 1 times [2022-11-26 00:02:23,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:23,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453706549] [2022-11-26 00:02:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:23,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:02:23,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453706549] [2022-11-26 00:02:23,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453706549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:23,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:23,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:02:23,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669687331] [2022-11-26 00:02:23,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:23,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:02:23,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:02:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:02:23,436 INFO L87 Difference]: Start difference. First operand 10725 states and 14126 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:02:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:25,277 INFO L93 Difference]: Finished difference Result 25885 states and 34123 transitions. [2022-11-26 00:02:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:02:25,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2022-11-26 00:02:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:25,340 INFO L225 Difference]: With dead ends: 25885 [2022-11-26 00:02:25,340 INFO L226 Difference]: Without dead ends: 15708 [2022-11-26 00:02:25,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:02:25,366 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 284 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:25,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 576 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15708 states. [2022-11-26 00:02:27,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15708 to 15433. [2022-11-26 00:02:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15433 states, 11779 states have (on average 1.3395874013074114) internal successors, (15779), 11883 states have internal predecessors, (15779), 2209 states have call successors, (2209), 1445 states have call predecessors, (2209), 1444 states have return successors, (2334), 2105 states have call predecessors, (2334), 2206 states have call successors, (2334) [2022-11-26 00:02:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15433 states to 15433 states and 20322 transitions. [2022-11-26 00:02:27,102 INFO L78 Accepts]: Start accepts. Automaton has 15433 states and 20322 transitions. Word has length 63 [2022-11-26 00:02:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:27,104 INFO L495 AbstractCegarLoop]: Abstraction has 15433 states and 20322 transitions. [2022-11-26 00:02:27,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:02:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 15433 states and 20322 transitions. [2022-11-26 00:02:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:02:27,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:27,109 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:27,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:02:27,109 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash -505922541, now seen corresponding path program 1 times [2022-11-26 00:02:27,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:27,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547090904] [2022-11-26 00:02:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:27,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:02:27,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:27,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547090904] [2022-11-26 00:02:27,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547090904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:27,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:27,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:27,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747371897] [2022-11-26 00:02:27,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:27,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:27,266 INFO L87 Difference]: Start difference. First operand 15433 states and 20322 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:02:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:31,116 INFO L93 Difference]: Finished difference Result 48675 states and 66346 transitions. [2022-11-26 00:02:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:02:31,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-11-26 00:02:31,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:31,259 INFO L225 Difference]: With dead ends: 48675 [2022-11-26 00:02:31,259 INFO L226 Difference]: Without dead ends: 33790 [2022-11-26 00:02:31,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:02:31,295 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 453 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:31,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 1382 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:02:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33790 states. [2022-11-26 00:02:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33790 to 24281. [2022-11-26 00:02:33,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24281 states, 18575 states have (on average 1.3428263795423956) internal successors, (24943), 18697 states have internal predecessors, (24943), 3451 states have call successors, (3451), 2255 states have call predecessors, (3451), 2254 states have return successors, (3668), 3329 states have call predecessors, (3668), 3448 states have call successors, (3668) [2022-11-26 00:02:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24281 states to 24281 states and 32062 transitions. [2022-11-26 00:02:33,728 INFO L78 Accepts]: Start accepts. Automaton has 24281 states and 32062 transitions. Word has length 66 [2022-11-26 00:02:33,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:33,728 INFO L495 AbstractCegarLoop]: Abstraction has 24281 states and 32062 transitions. [2022-11-26 00:02:33,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:02:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 24281 states and 32062 transitions. [2022-11-26 00:02:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:02:33,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:33,733 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:33,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:02:33,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:33,734 INFO L85 PathProgramCache]: Analyzing trace with hash -349305876, now seen corresponding path program 1 times [2022-11-26 00:02:33,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:33,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032424883] [2022-11-26 00:02:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:33,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:02:33,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032424883] [2022-11-26 00:02:33,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032424883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:33,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:33,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073439206] [2022-11-26 00:02:33,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:33,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:33,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:33,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:33,875 INFO L87 Difference]: Start difference. First operand 24281 states and 32062 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:02:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:38,228 INFO L93 Difference]: Finished difference Result 66584 states and 88072 transitions. [2022-11-26 00:02:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:02:38,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 70 [2022-11-26 00:02:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:38,426 INFO L225 Difference]: With dead ends: 66584 [2022-11-26 00:02:38,427 INFO L226 Difference]: Without dead ends: 42309 [2022-11-26 00:02:38,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:02:38,483 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 252 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:38,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 300 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42309 states. [2022-11-26 00:02:43,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42309 to 41466. [2022-11-26 00:02:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41466 states, 31067 states have (on average 1.3103614768081888) internal successors, (40709), 31247 states have internal predecessors, (40709), 6364 states have call successors, (6364), 4035 states have call predecessors, (6364), 4034 states have return successors, (6801), 6184 states have call predecessors, (6801), 6361 states have call successors, (6801) [2022-11-26 00:02:43,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41466 states to 41466 states and 53874 transitions. [2022-11-26 00:02:43,217 INFO L78 Accepts]: Start accepts. Automaton has 41466 states and 53874 transitions. Word has length 70 [2022-11-26 00:02:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:43,218 INFO L495 AbstractCegarLoop]: Abstraction has 41466 states and 53874 transitions. [2022-11-26 00:02:43,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:02:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 41466 states and 53874 transitions. [2022-11-26 00:02:43,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-26 00:02:43,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:43,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:43,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:02:43,224 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash -693378895, now seen corresponding path program 1 times [2022-11-26 00:02:43,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:43,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530606119] [2022-11-26 00:02:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:43,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:02:43,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:43,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530606119] [2022-11-26 00:02:43,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530606119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:43,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:43,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:02:43,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901350575] [2022-11-26 00:02:43,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:43,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:02:43,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:02:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:02:43,307 INFO L87 Difference]: Start difference. First operand 41466 states and 53874 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-26 00:02:48,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:48,730 INFO L93 Difference]: Finished difference Result 90501 states and 116758 transitions. [2022-11-26 00:02:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:02:48,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-11-26 00:02:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:48,911 INFO L225 Difference]: With dead ends: 90501 [2022-11-26 00:02:48,911 INFO L226 Difference]: Without dead ends: 49041 [2022-11-26 00:02:48,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:02:48,993 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 477 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:48,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 501 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:02:49,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49041 states. [2022-11-26 00:02:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49041 to 43616. [2022-11-26 00:02:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43616 states, 32773 states have (on average 1.3043969120922712) internal successors, (42749), 32953 states have internal predecessors, (42749), 6586 states have call successors, (6586), 4257 states have call predecessors, (6586), 4256 states have return successors, (7023), 6406 states have call predecessors, (7023), 6583 states have call successors, (7023) [2022-11-26 00:02:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43616 states to 43616 states and 56358 transitions. [2022-11-26 00:02:53,648 INFO L78 Accepts]: Start accepts. Automaton has 43616 states and 56358 transitions. Word has length 69 [2022-11-26 00:02:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:53,648 INFO L495 AbstractCegarLoop]: Abstraction has 43616 states and 56358 transitions. [2022-11-26 00:02:53,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-26 00:02:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 43616 states and 56358 transitions. [2022-11-26 00:02:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:02:53,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:53,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:53,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:02:53,653 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:02:53,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:53,654 INFO L85 PathProgramCache]: Analyzing trace with hash -716216935, now seen corresponding path program 1 times [2022-11-26 00:02:53,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:02:53,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026213490] [2022-11-26 00:02:53,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:53,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:02:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:02:53,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:02:53,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026213490] [2022-11-26 00:02:53,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026213490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:53,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:53,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:02:53,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175892115] [2022-11-26 00:02:53,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:53,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:02:53,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:02:53,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:02:53,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:02:53,745 INFO L87 Difference]: Start difference. First operand 43616 states and 56358 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)