./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- 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-2329fc7 [2022-12-14 12:45:25,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:45:25,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:45:25,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:45:25,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:45:25,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:45:25,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:45:25,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:45:25,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:45:25,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:45:25,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:45:25,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:45:25,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:45:25,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:45:25,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:45:25,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:45:25,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:45:25,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:45:25,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:45:25,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:45:25,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:45:25,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:45:25,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:45:25,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:45:25,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:45:25,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:45:25,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:45:25,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:45:25,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:45:25,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:45:25,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:45:25,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:45:25,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:45:25,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:45:25,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:45:25,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:45:25,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:45:25,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:45:25,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:45:25,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:45:25,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:45:25,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:45:25,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:45:25,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:45:25,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:45:25,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:45:25,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:45:25,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:45:25,976 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:45:25,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:45:25,976 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:45:25,976 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:45:25,976 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:45:25,976 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:45:25,976 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:45:25,976 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:45:25,977 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:45:25,977 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:45:25,977 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:45:25,977 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:45:25,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:45:25,978 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:45:25,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:45:25,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:45:25,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:45:25,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:45:25,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:45:25,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:45:25,979 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:45:25,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:45:25,979 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:45:25,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:45:25,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:45:25,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:45:25,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:45:25,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:45:25,980 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:45:25,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:45:25,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:45:25,981 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:45:25,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:45:25,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:45:25,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:45:25,981 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_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-12-14 12:45:26,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:45:26,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:45:26,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:45:26,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:45:26,173 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:45:26,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-12-14 12:45:28,673 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:45:28,814 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:45:28,814 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-12-14 12:45:28,819 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/data/9d27b794a/a2117203c7754d2fb787e6a36ecfe5ad/FLAGa76bd792c [2022-12-14 12:45:29,227 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/data/9d27b794a/a2117203c7754d2fb787e6a36ecfe5ad [2022-12-14 12:45:29,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:45:29,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:45:29,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:45:29,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:45:29,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:45:29,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1efb9ddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29, skipping insertion in model container [2022-12-14 12:45:29,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:45:29,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:45:29,365 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_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-12-14 12:45:29,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:45:29,404 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:45:29,411 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_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-12-14 12:45:29,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:45:29,440 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:45:29,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29 WrapperNode [2022-12-14 12:45:29,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:45:29,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:45:29,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:45:29,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:45:29,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,464 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-12-14 12:45:29,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:45:29,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:45:29,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:45:29,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:45:29,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,485 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:45:29,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:45:29,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:45:29,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:45:29,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (1/1) ... [2022-12-14 12:45:29,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:45:29,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:29,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:45:29,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:45:29,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:45:29,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:45:29,548 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-12-14 12:45:29,548 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-12-14 12:45:29,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:45:29,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:45:29,548 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-12-14 12:45:29,549 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-12-14 12:45:29,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:45:29,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:45:29,616 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:45:29,618 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:45:29,883 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:45:30,011 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:45:30,011 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:45:30,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:45:30 BoogieIcfgContainer [2022-12-14 12:45:30,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:45:30,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:45:30,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:45:30,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:45:30,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:45:29" (1/3) ... [2022-12-14 12:45:30,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b0bfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:45:30, skipping insertion in model container [2022-12-14 12:45:30,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:29" (2/3) ... [2022-12-14 12:45:30,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b0bfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:45:30, skipping insertion in model container [2022-12-14 12:45:30,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:45:30" (3/3) ... [2022-12-14 12:45:30,021 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-12-14 12:45:30,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:45:30,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:45:30,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:45:30,074 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;@14647dff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:45:30,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:45:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 12:45:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 12:45:30,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:30,084 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:30,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:30,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash 942932108, now seen corresponding path program 1 times [2022-12-14 12:45:30,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:30,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926673736] [2022-12-14 12:45:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:30,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:45:30,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926673736] [2022-12-14 12:45:30,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926673736] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:30,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:30,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 12:45:30,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642387338] [2022-12-14 12:45:30,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:30,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:45:30,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:30,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:45:30,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:45:30,563 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 12:45:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:30,748 INFO L93 Difference]: Finished difference Result 108 states and 164 transitions. [2022-12-14 12:45:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:45:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-12-14 12:45:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:30,756 INFO L225 Difference]: With dead ends: 108 [2022-12-14 12:45:30,756 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 12:45:30,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:45:30,761 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:30,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 322 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:45:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 12:45:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-12-14 12:45:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-12-14 12:45:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2022-12-14 12:45:30,794 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 26 [2022-12-14 12:45:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:30,794 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2022-12-14 12:45:30,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 12:45:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2022-12-14 12:45:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:45:30,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:30,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:30,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:45:30,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:30,798 INFO L85 PathProgramCache]: Analyzing trace with hash -596552451, now seen corresponding path program 1 times [2022-12-14 12:45:30,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:30,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783416780] [2022-12-14 12:45:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:45:31,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:31,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783416780] [2022-12-14 12:45:31,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783416780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:45:31,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653503408] [2022-12-14 12:45:31,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:31,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:31,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:45:31,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:45:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:31,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:45:31,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:45:31,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:45:31,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653503408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:31,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374038175] [2022-12-14 12:45:31,591 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 12:45:31,592 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:45:31,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:45:31,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:45:31,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:45:31,770 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 36 for LOIs [2022-12-14 12:45:32,144 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2022-12-14 12:45:32,202 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-12-14 12:45:32,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:45:35,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '477#(and (= (select |#length| 3) 12) (= (select |#length| 2) 24) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:45:35,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:45:35,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:45:35,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 15 [2022-12-14 12:45:35,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59381653] [2022-12-14 12:45:35,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:45:35,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:45:35,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:45:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:45:35,528 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:45:35,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:35,811 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2022-12-14 12:45:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 12:45:35,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-12-14 12:45:35,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:35,812 INFO L225 Difference]: With dead ends: 134 [2022-12-14 12:45:35,812 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 12:45:35,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 12:45:35,814 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:35,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 382 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:45:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 12:45:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2022-12-14 12:45:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-12-14 12:45:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-12-14 12:45:35,823 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 30 [2022-12-14 12:45:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:35,823 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-12-14 12:45:35,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:45:35,824 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-12-14 12:45:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:45:35,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:35,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:35,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:45:36,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:36,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1762653251, now seen corresponding path program 2 times [2022-12-14 12:45:36,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:36,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248566831] [2022-12-14 12:45:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:36,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:45:36,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:36,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248566831] [2022-12-14 12:45:36,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248566831] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:36,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:36,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:45:36,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862759204] [2022-12-14 12:45:36,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:36,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:45:36,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:36,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:45:36,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:45:36,190 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:45:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:36,259 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2022-12-14 12:45:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:45:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-12-14 12:45:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:36,260 INFO L225 Difference]: With dead ends: 98 [2022-12-14 12:45:36,260 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 12:45:36,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:45:36,261 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:36,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 296 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:45:36,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 12:45:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-12-14 12:45:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-12-14 12:45:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-12-14 12:45:36,268 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 30 [2022-12-14 12:45:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:36,269 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-12-14 12:45:36,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:45:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-12-14 12:45:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 12:45:36,271 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:36,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:36,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:45:36,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash 764788470, now seen corresponding path program 1 times [2022-12-14 12:45:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:36,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202570984] [2022-12-14 12:45:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:36,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:36,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202570984] [2022-12-14 12:45:36,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202570984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:36,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:36,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-14 12:45:36,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966459190] [2022-12-14 12:45:36,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:36,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:45:36,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:45:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:45:36,688 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 12:45:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:36,917 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2022-12-14 12:45:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 12:45:36,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2022-12-14 12:45:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:36,919 INFO L225 Difference]: With dead ends: 83 [2022-12-14 12:45:36,919 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 12:45:36,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-12-14 12:45:36,920 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:36,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 517 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:45:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 12:45:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-12-14 12:45:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 40 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-12-14 12:45:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-12-14 12:45:36,925 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 35 [2022-12-14 12:45:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:36,926 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-12-14 12:45:36,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 12:45:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-12-14 12:45:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 12:45:36,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:36,926 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:36,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:45:36,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash 451043246, now seen corresponding path program 3 times [2022-12-14 12:45:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:36,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673969993] [2022-12-14 12:45:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:36,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:45:36,966 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:45:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:45:37,040 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:45:37,040 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:45:37,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 12:45:37,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:45:37,045 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-12-14 12:45:37,047 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 12:45:37,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 12:45:37 BoogieIcfgContainer [2022-12-14 12:45:37,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 12:45:37,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 12:45:37,065 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 12:45:37,066 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 12:45:37,066 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:45:30" (3/4) ... [2022-12-14 12:45:37,068 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 12:45:37,068 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 12:45:37,068 INFO L158 Benchmark]: Toolchain (without parser) took 7838.48ms. Allocated memory was 201.3MB in the beginning and 243.3MB in the end (delta: 41.9MB). Free memory was 130.5MB in the beginning and 205.1MB in the end (delta: -74.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:45:37,069 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory was 171.0MB in the beginning and 170.8MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:45:37,069 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.84ms. Allocated memory is still 201.3MB. Free memory was 130.2MB in the beginning and 166.3MB in the end (delta: -36.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 12:45:37,069 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.60ms. Allocated memory is still 201.3MB. Free memory was 166.3MB in the beginning and 164.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:45:37,069 INFO L158 Benchmark]: Boogie Preprocessor took 22.65ms. Allocated memory is still 201.3MB. Free memory was 164.2MB in the beginning and 163.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:45:37,070 INFO L158 Benchmark]: RCFGBuilder took 525.56ms. Allocated memory is still 201.3MB. Free memory was 163.0MB in the beginning and 122.3MB in the end (delta: 40.7MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-12-14 12:45:37,070 INFO L158 Benchmark]: TraceAbstraction took 7049.39ms. Allocated memory was 201.3MB in the beginning and 243.3MB in the end (delta: 41.9MB). Free memory was 121.9MB in the beginning and 206.2MB in the end (delta: -84.3MB). Peak memory consumption was 89.7MB. Max. memory is 16.1GB. [2022-12-14 12:45:37,070 INFO L158 Benchmark]: Witness Printer took 2.76ms. Allocated memory is still 243.3MB. Free memory was 206.2MB in the beginning and 205.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:45:37,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory was 171.0MB in the beginning and 170.8MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.84ms. Allocated memory is still 201.3MB. Free memory was 130.2MB in the beginning and 166.3MB in the end (delta: -36.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.60ms. Allocated memory is still 201.3MB. Free memory was 166.3MB in the beginning and 164.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.65ms. Allocated memory is still 201.3MB. Free memory was 164.2MB in the beginning and 163.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 525.56ms. Allocated memory is still 201.3MB. Free memory was 163.0MB in the beginning and 122.3MB in the end (delta: 40.7MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * TraceAbstraction took 7049.39ms. Allocated memory was 201.3MB in the beginning and 243.3MB in the end (delta: 41.9MB). Free memory was 121.9MB in the beginning and 206.2MB in the end (delta: -84.3MB). Peak memory consumption was 89.7MB. Max. memory is 16.1GB. * Witness Printer took 2.76ms. Allocated memory is still 243.3MB. Free memory was 206.2MB in the beginning and 205.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 109, overapproximation of bitwiseComplement at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=-126, eb=127] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); [L242] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-126, eb=127] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-126, \old(m)=16777216] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L30] COND FALSE !(! m) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L58] COND TRUE 1 VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=-126, \old(m)=16777216, __retres4=33554432, e=-126, m=0, res=33554432] [L81] return (__retres4); [L243] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=33554432, ea=-126, eb=127, ma=16777216, zero=0] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554431] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=127, \old(m)=33554431, __retres4=16777214, e=127, m=33554430, res=16777214] [L81] return (__retres4); [L244] RET, EXPR base2flt(mb, eb) VAL [a=33554432, base2flt(mb, eb)=4311744510, ea=-126, eb=127, ma=16777216, mb=33554431, zero=0] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=33554432, \old(b)=16777214] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; [L95] COND FALSE !(a < b) VAL [\old(a)=33554432, \old(b)=16777214, a=33554432, b=16777214, tmp=33554432] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 [L114] mb = mb | (1U << 24U) VAL [\old(a)=33554432, \old(b)=16777214, a=33554432, b=16777214, ea=-126, eb=128, ma=16777216, mb=16777216, tmp=33554432] [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.0s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 111 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 92 mSDsluCounter, 1517 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1339 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 932 IncrementalHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 178 mSDtfsCounter, 932 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=2, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 42 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 410 SizeOfPredicates, 8 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 64/76 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 12:45:37,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- 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-2329fc7 [2022-12-14 12:45:38,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:45:38,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:45:38,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:45:38,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:45:38,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:45:38,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:45:38,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:45:38,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:45:38,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:45:38,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:45:38,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:45:38,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:45:38,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:45:38,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:45:38,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:45:38,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:45:38,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:45:38,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:45:38,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:45:38,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:45:38,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:45:38,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:45:38,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:45:38,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:45:38,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:45:38,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:45:38,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:45:38,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:45:38,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:45:38,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:45:38,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:45:38,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:45:38,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:45:38,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:45:38,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:45:38,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:45:38,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:45:38,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:45:38,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:45:38,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:45:38,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 12:45:38,692 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:45:38,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:45:38,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:45:38,692 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:45:38,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:45:38,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:45:38,693 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:45:38,693 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:45:38,693 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:45:38,693 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:45:38,693 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:45:38,694 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:45:38,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:45:38,694 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:45:38,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:45:38,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:45:38,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:45:38,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:45:38,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:45:38,695 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:45:38,695 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 12:45:38,695 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 12:45:38,695 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:45:38,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:45:38,695 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:45:38,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:45:38,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:45:38,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 12:45:38,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:45:38,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:45:38,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:45:38,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:45:38,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:45:38,697 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 12:45:38,697 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 12:45:38,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:45:38,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:45:38,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 12:45:38,697 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-12-14 12:45:38,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:45:38,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:45:38,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:45:38,921 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:45:38,921 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:45:38,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-12-14 12:45:41,392 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:45:41,549 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:45:41,549 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-12-14 12:45:41,556 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/data/9efbc8a70/773ec78e4dba4f7ba0e755d018365abc/FLAG7af07efe8 [2022-12-14 12:45:41,951 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/data/9efbc8a70/773ec78e4dba4f7ba0e755d018365abc [2022-12-14 12:45:41,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:45:41,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:45:41,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:45:41,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:45:41,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:45:41,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:45:41" (1/1) ... [2022-12-14 12:45:41,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21804cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:41, skipping insertion in model container [2022-12-14 12:45:41,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:45:41" (1/1) ... [2022-12-14 12:45:41,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:45:41,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:45:42,082 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_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-12-14 12:45:42,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:45:42,121 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:45:42,130 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_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-12-14 12:45:42,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:45:42,156 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:45:42,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42 WrapperNode [2022-12-14 12:45:42,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:45:42,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:45:42,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:45:42,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:45:42,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,181 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-12-14 12:45:42,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:45:42,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:45:42,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:45:42,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:45:42,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,200 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:45:42,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:45:42,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:45:42,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:45:42,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (1/1) ... [2022-12-14 12:45:42,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:45:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:42,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:45:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:45:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:45:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 12:45:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-12-14 12:45:42,266 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-12-14 12:45:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:45:42,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:45:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-12-14 12:45:42,266 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-12-14 12:45:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:45:42,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:45:42,325 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:45:42,327 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:45:42,504 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:45:42,508 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:45:42,509 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:45:42,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:45:42 BoogieIcfgContainer [2022-12-14 12:45:42,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:45:42,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:45:42,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:45:42,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:45:42,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:45:41" (1/3) ... [2022-12-14 12:45:42,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5511c8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:45:42, skipping insertion in model container [2022-12-14 12:45:42,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:42" (2/3) ... [2022-12-14 12:45:42,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5511c8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:45:42, skipping insertion in model container [2022-12-14 12:45:42,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:45:42" (3/3) ... [2022-12-14 12:45:42,516 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-12-14 12:45:42,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:45:42,530 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:45:42,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:45:42,571 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;@643abd58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:45:42,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:45:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 12:45:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 12:45:42,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:42,581 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:42,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:42,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2022-12-14 12:45:42,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:42,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024937348] [2022-12-14 12:45:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:42,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:42,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:42,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:42,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 12:45:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:42,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:45:42,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:42,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:45:42,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:42,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024937348] [2022-12-14 12:45:42,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024937348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:42,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:42,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:45:42,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206680442] [2022-12-14 12:45:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:42,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:45:42,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:42,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:45:42,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:45:42,842 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:45:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:42,963 INFO L93 Difference]: Finished difference Result 130 states and 195 transitions. [2022-12-14 12:45:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:45:42,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-12-14 12:45:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:42,971 INFO L225 Difference]: With dead ends: 130 [2022-12-14 12:45:42,971 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 12:45:42,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:45:42,976 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 23 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:42,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 452 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:45:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 12:45:43,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-12-14 12:45:43,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 48 states have internal predecessors, (60), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 12:45:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2022-12-14 12:45:43,006 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 31 [2022-12-14 12:45:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:43,007 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2022-12-14 12:45:43,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:45:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2022-12-14 12:45:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 12:45:43,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:43,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:43,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:45:43,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:43,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:43,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1468368814, now seen corresponding path program 1 times [2022-12-14 12:45:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:43,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963581461] [2022-12-14 12:45:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:43,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:43,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:43,220 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:43,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 12:45:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:43,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:45:43,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:43,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:43,523 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:43,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963581461] [2022-12-14 12:45:43,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963581461] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:43,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488242239] [2022-12-14 12:45:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:43,524 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:45:43,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:45:43,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:45:43,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-12-14 12:45:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:45:43,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:43,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:43,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1488242239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:43,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891246823] [2022-12-14 12:45:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:43,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:43,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:43,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:45:43,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:45:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:43,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:45:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:43,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:43,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891246823] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:43,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:45:43,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2022-12-14 12:45:43,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589868404] [2022-12-14 12:45:43,775 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:45:43,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:45:43,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:45:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:45:43,777 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 12:45:43,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:43,889 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2022-12-14 12:45:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:45:43,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-12-14 12:45:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:43,890 INFO L225 Difference]: With dead ends: 121 [2022-12-14 12:45:43,890 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 12:45:43,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:45:43,892 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 27 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:43,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 484 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:45:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 12:45:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-12-14 12:45:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-12-14 12:45:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-12-14 12:45:43,900 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2022-12-14 12:45:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:43,901 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-12-14 12:45:43,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 12:45:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-12-14 12:45:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 12:45:43,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:43,902 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:43,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 12:45:44,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2022-12-14 12:45:44,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:45:44,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:44,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:44,507 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2022-12-14 12:45:44,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:44,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530462488] [2022-12-14 12:45:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:44,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:44,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:44,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:44,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 12:45:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:44,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:45:44,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:44,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:44,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530462488] [2022-12-14 12:45:44,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530462488] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1467764594] [2022-12-14 12:45:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:44,706 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:45:44,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:45:44,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:45:44,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 12:45:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:44,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:45:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:45:44,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:45:44,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1467764594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:44,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:45:44,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 12 [2022-12-14 12:45:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886292166] [2022-12-14 12:45:44,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:44,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:45:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:45:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:45:44,824 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 12:45:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:44,941 INFO L93 Difference]: Finished difference Result 114 states and 148 transitions. [2022-12-14 12:45:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:45:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-12-14 12:45:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:44,943 INFO L225 Difference]: With dead ends: 114 [2022-12-14 12:45:44,943 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 12:45:44,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:45:44,945 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 20 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:44,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 508 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:45:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 12:45:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2022-12-14 12:45:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-12-14 12:45:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-12-14 12:45:44,956 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2022-12-14 12:45:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:44,957 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-12-14 12:45:44,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 12:45:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-12-14 12:45:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 12:45:44,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:44,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:44,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 12:45:45,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-14 12:45:45,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:45,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:45,362 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2022-12-14 12:45:45,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:45,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645481590] [2022-12-14 12:45:45,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:45:45,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:45,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:45,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 12:45:45,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 12:45:45,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:45:45,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:45:45,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 12:45:45,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:45:45,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:45,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645481590] [2022-12-14 12:45:45,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645481590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:45,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:45,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:45:45,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911840220] [2022-12-14 12:45:45,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:45,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:45:45,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:45,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:45:45,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:45:45,506 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:45:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:46,615 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2022-12-14 12:45:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:45:46,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-12-14 12:45:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:46,617 INFO L225 Difference]: With dead ends: 109 [2022-12-14 12:45:46,617 INFO L226 Difference]: Without dead ends: 107 [2022-12-14 12:45:46,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:45:46,619 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 30 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:46,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 330 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 12:45:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-14 12:45:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2022-12-14 12:45:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 66 states have internal predecessors, (80), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-12-14 12:45:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2022-12-14 12:45:46,632 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 39 [2022-12-14 12:45:46,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:46,632 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2022-12-14 12:45:46,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:45:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2022-12-14 12:45:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 12:45:46,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:46,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:46,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 12:45:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:46,836 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash 518419771, now seen corresponding path program 1 times [2022-12-14 12:45:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:46,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724282290] [2022-12-14 12:45:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:46,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:46,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:46,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:46,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 12:45:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:46,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:45:46,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 12:45:46,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:45:46,988 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:46,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724282290] [2022-12-14 12:45:46,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724282290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:46,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:46,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:45:46,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560346192] [2022-12-14 12:45:46,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:46,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:45:46,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:46,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:45:46,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:45:46,990 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:45:49,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:45:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:49,137 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-12-14 12:45:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:45:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-12-14 12:45:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:49,138 INFO L225 Difference]: With dead ends: 96 [2022-12-14 12:45:49,139 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 12:45:49,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:45:49,140 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 31 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:49,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 290 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 12:45:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 12:45:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2022-12-14 12:45:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-12-14 12:45:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-12-14 12:45:49,153 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2022-12-14 12:45:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:49,153 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-12-14 12:45:49,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:45:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-12-14 12:45:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 12:45:49,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:49,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:49,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 12:45:49,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:49,357 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1863687100, now seen corresponding path program 1 times [2022-12-14 12:45:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:49,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5370355] [2022-12-14 12:45:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:49,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:49,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:49,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:49,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 12:45:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:45:49,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:49,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:49,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:49,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5370355] [2022-12-14 12:45:49,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5370355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:49,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1233983800] [2022-12-14 12:45:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:49,556 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:45:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:45:49,557 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:45:49,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-12-14 12:45:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:49,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:45:49,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:49,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:49,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1233983800] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:49,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899387263] [2022-12-14 12:45:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:49,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:49,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:49,700 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:45:49,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:45:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:45:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:49,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:49,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899387263] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:49,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:45:49,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2022-12-14 12:45:49,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264088299] [2022-12-14 12:45:49,823 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:45:49,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:45:49,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:49,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:45:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:45:49,825 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:45:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:49,943 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2022-12-14 12:45:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:45:49,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-12-14 12:45:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:49,944 INFO L225 Difference]: With dead ends: 129 [2022-12-14 12:45:49,944 INFO L226 Difference]: Without dead ends: 118 [2022-12-14 12:45:49,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:45:49,945 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 50 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:49,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 439 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:45:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-14 12:45:49,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2022-12-14 12:45:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2022-12-14 12:45:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2022-12-14 12:45:49,957 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 44 [2022-12-14 12:45:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:49,957 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2022-12-14 12:45:49,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:45:49,957 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2022-12-14 12:45:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 12:45:49,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:49,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:49,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:45:50,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 12:45:50,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2022-12-14 12:45:50,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:45:50,561 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2022-12-14 12:45:50,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:50,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983707521] [2022-12-14 12:45:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:50,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:50,567 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:50,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 12:45:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:50,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 12:45:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:50,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:45:50,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:50,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983707521] [2022-12-14 12:45:50,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983707521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:50,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:50,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 12:45:50,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001327268] [2022-12-14 12:45:50,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:50,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:45:50,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:50,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:45:50,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:45:50,721 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:45:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:50,930 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2022-12-14 12:45:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:45:50,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-12-14 12:45:50,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:50,932 INFO L225 Difference]: With dead ends: 133 [2022-12-14 12:45:50,932 INFO L226 Difference]: Without dead ends: 126 [2022-12-14 12:45:50,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:45:50,934 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 35 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:50,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 643 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:45:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-14 12:45:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2022-12-14 12:45:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 76 states have internal predecessors, (90), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-12-14 12:45:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-12-14 12:45:50,956 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 44 [2022-12-14 12:45:50,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:50,956 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-12-14 12:45:50,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:45:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-12-14 12:45:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 12:45:50,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:50,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:50,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 12:45:51,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:51,159 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2022-12-14 12:45:51,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:51,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132119571] [2022-12-14 12:45:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:51,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:51,162 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:51,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 12:45:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 12:45:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:51,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:51,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132119571] [2022-12-14 12:45:51,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132119571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [828749538] [2022-12-14 12:45:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:51,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:45:51,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:45:51,490 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:45:51,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 12:45:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:51,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:45:51,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:51,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:51,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [828749538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:51,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940805658] [2022-12-14 12:45:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:51,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:51,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:51,784 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:45:51,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:45:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:51,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 12:45:51,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:51,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:45:51,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940805658] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:51,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:45:51,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 21 [2022-12-14 12:45:51,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874493622] [2022-12-14 12:45:51,938 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:45:51,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 12:45:51,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:51,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 12:45:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:45:51,940 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 12:45:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:52,398 INFO L93 Difference]: Finished difference Result 177 states and 229 transitions. [2022-12-14 12:45:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 12:45:52,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 46 [2022-12-14 12:45:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:52,400 INFO L225 Difference]: With dead ends: 177 [2022-12-14 12:45:52,400 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 12:45:52,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-12-14 12:45:52,402 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 98 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:52,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 968 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:45:52,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 12:45:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 123. [2022-12-14 12:45:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 94 states have internal predecessors, (111), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 19 states have call predecessors, (29), 17 states have call successors, (29) [2022-12-14 12:45:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2022-12-14 12:45:52,413 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 46 [2022-12-14 12:45:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:52,414 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2022-12-14 12:45:52,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 12:45:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2022-12-14 12:45:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 12:45:52,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:52,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:52,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 12:45:52,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 12:45:52,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 12:45:53,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:53,018 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:53,019 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2022-12-14 12:45:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:53,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468004747] [2022-12-14 12:45:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:53,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:53,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:53,024 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:53,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 12:45:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:53,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:45:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 12:45:53,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:45:53,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468004747] [2022-12-14 12:45:53,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468004747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:53,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:53,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:45:53,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701826676] [2022-12-14 12:45:53,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:53,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:45:53,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:53,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:45:53,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:45:53,090 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 12:45:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:53,126 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2022-12-14 12:45:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:45:53,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-12-14 12:45:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:53,127 INFO L225 Difference]: With dead ends: 131 [2022-12-14 12:45:53,127 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 12:45:53,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:45:53,129 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:53,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 309 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:45:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 12:45:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-12-14 12:45:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 85 states have internal predecessors, (98), 16 states have call successors, (16), 8 states have call predecessors, (16), 11 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2022-12-14 12:45:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2022-12-14 12:45:53,138 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 46 [2022-12-14 12:45:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:53,138 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2022-12-14 12:45:53,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 12:45:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2022-12-14 12:45:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 12:45:53,138 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:53,139 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:53,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 12:45:53,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:53,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2022-12-14 12:45:53,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:53,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731421208] [2022-12-14 12:45:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:53,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:53,343 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:53,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 12:45:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:53,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:45:53,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:53,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:53,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:53,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731421208] [2022-12-14 12:45:53,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731421208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:53,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [875297751] [2022-12-14 12:45:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:53,860 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:45:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:45:53,861 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:45:53,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 12:45:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:53,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:45:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:53,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:53,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [875297751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:53,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221377158] [2022-12-14 12:45:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:53,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:53,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:53,998 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:45:53,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:45:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:54,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:45:54,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:54,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:54,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221377158] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:54,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:45:54,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2022-12-14 12:45:54,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030556325] [2022-12-14 12:45:54,156 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:45:54,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 12:45:54,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 12:45:54,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:45:54,158 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:45:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:55,089 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2022-12-14 12:45:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:45:55,090 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-12-14 12:45:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:55,090 INFO L225 Difference]: With dead ends: 156 [2022-12-14 12:45:55,090 INFO L226 Difference]: Without dead ends: 122 [2022-12-14 12:45:55,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 12:45:55,092 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 143 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:55,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1137 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:45:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-14 12:45:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2022-12-14 12:45:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 78 states have internal predecessors, (88), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-12-14 12:45:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2022-12-14 12:45:55,107 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 48 [2022-12-14 12:45:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:55,107 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2022-12-14 12:45:55,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:45:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2022-12-14 12:45:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 12:45:55,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:55,108 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:55,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 12:45:55,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 12:45:55,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 12:45:55,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:55,710 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2022-12-14 12:45:55,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:55,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127178589] [2022-12-14 12:45:55,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:45:55,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:55,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:55,716 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:55,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 12:45:55,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:45:55,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:45:55,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:45:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:55,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:56,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:56,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127178589] [2022-12-14 12:45:56,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127178589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:56,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [604527832] [2022-12-14 12:45:56,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:45:56,164 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:45:56,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:45:56,164 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:45:56,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 12:45:56,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:45:56,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:45:56,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:45:56,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:56,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:56,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [604527832] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:56,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947360290] [2022-12-14 12:45:56,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:45:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:56,313 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:45:56,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 12:45:56,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:45:56,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:45:56,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:45:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:56,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:45:56,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947360290] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:56,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:45:56,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2022-12-14 12:45:56,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646462040] [2022-12-14 12:45:56,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:45:56,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 12:45:56,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 12:45:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:45:56,484 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:45:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:57,500 INFO L93 Difference]: Finished difference Result 137 states and 186 transitions. [2022-12-14 12:45:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:45:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-12-14 12:45:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:57,501 INFO L225 Difference]: With dead ends: 137 [2022-12-14 12:45:57,501 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 12:45:57,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 12:45:57,503 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 120 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:57,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1327 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:45:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 12:45:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2022-12-14 12:45:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 66 states have internal predecessors, (76), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-12-14 12:45:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2022-12-14 12:45:57,515 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 48 [2022-12-14 12:45:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:57,516 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2022-12-14 12:45:57,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:45:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2022-12-14 12:45:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 12:45:57,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:57,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-14 12:45:57,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 12:45:57,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 12:45:57,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 12:45:58,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:58,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2022-12-14 12:45:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:58,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096610514] [2022-12-14 12:45:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:58,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:58,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:58,123 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:58,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 12:45:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:58,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:45:58,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 12:45:58,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:45:58,991 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:45:58,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096610514] [2022-12-14 12:45:58,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096610514] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:58,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:58,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:45:58,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017343086] [2022-12-14 12:45:58,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:58,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:45:58,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:45:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:45:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:45:58,992 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 12:45:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:59,117 INFO L93 Difference]: Finished difference Result 94 states and 130 transitions. [2022-12-14 12:45:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:45:59,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-12-14 12:45:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:59,119 INFO L225 Difference]: With dead ends: 94 [2022-12-14 12:45:59,119 INFO L226 Difference]: Without dead ends: 92 [2022-12-14 12:45:59,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:45:59,120 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 18 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:59,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 298 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:45:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-14 12:45:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-12-14 12:45:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.234375) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-12-14 12:45:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-12-14 12:45:59,131 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 49 [2022-12-14 12:45:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:59,131 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-12-14 12:45:59,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 12:45:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-12-14 12:45:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 12:45:59,132 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:59,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-14 12:45:59,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-12-14 12:45:59,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:59,333 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975685, now seen corresponding path program 1 times [2022-12-14 12:45:59,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:45:59,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164067710] [2022-12-14 12:45:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:59,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:45:59,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:45:59,339 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:45:59,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 12:45:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:59,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:45:59,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 12:46:04,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:46:04,351 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:04,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164067710] [2022-12-14 12:46:04,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164067710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:04,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:04,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:46:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542658343] [2022-12-14 12:46:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:46:04,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:46:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2022-12-14 12:46:04,352 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 12:46:07,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:46:09,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:46:11,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:46:13,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:46:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:13,743 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-12-14 12:46:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:46:13,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-12-14 12:46:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:13,745 INFO L225 Difference]: With dead ends: 98 [2022-12-14 12:46:13,745 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 12:46:13,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2022-12-14 12:46:13,745 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 18 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:13,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 297 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 4 Unknown, 0 Unchecked, 9.4s Time] [2022-12-14 12:46:13,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 12:46:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-12-14 12:46:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-12-14 12:46:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2022-12-14 12:46:13,758 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 50 [2022-12-14 12:46:13,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:13,759 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2022-12-14 12:46:13,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 12:46:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2022-12-14 12:46:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:46:13,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:13,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:13,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 12:46:13,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:13,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1592416888, now seen corresponding path program 1 times [2022-12-14 12:46:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:13,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078038089] [2022-12-14 12:46:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:13,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:13,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:13,962 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:13,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 12:46:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:14,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:14,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:14,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:14,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078038089] [2022-12-14 12:46:14,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078038089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:14,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1212251822] [2022-12-14 12:46:14,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:14,186 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:14,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:46:14,186 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:46:14,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-12-14 12:46:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:14,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:46:14,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:14,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:46:14,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1212251822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:14,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:46:14,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-12-14 12:46:14,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810518864] [2022-12-14 12:46:14,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:14,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:46:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:14,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:46:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:46:14,316 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:46:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:14,403 INFO L93 Difference]: Finished difference Result 117 states and 175 transitions. [2022-12-14 12:46:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:46:14,404 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-12-14 12:46:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:14,404 INFO L225 Difference]: With dead ends: 117 [2022-12-14 12:46:14,405 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 12:46:14,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:46:14,405 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 31 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:14,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 280 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 12:46:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2022-12-14 12:46:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 78 states have internal predecessors, (88), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (44), 15 states have call predecessors, (44), 14 states have call successors, (44) [2022-12-14 12:46:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 147 transitions. [2022-12-14 12:46:14,413 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 147 transitions. Word has length 54 [2022-12-14 12:46:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:14,414 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 147 transitions. [2022-12-14 12:46:14,414 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:46:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 147 transitions. [2022-12-14 12:46:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 12:46:14,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:14,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:14,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-12-14 12:46:14,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-12-14 12:46:14,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:14,816 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:14,817 INFO L85 PathProgramCache]: Analyzing trace with hash 18588658, now seen corresponding path program 1 times [2022-12-14 12:46:14,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:14,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107957233] [2022-12-14 12:46:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:14,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:14,822 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:14,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 12:46:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:14,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:14,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:14,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:15,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:15,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107957233] [2022-12-14 12:46:15,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107957233] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:15,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1184492366] [2022-12-14 12:46:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:15,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:15,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:46:15,068 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:46:15,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 12:46:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:15,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:15,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:15,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1184492366] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:15,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611817952] [2022-12-14 12:46:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:15,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:15,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:15,255 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:15,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 12:46:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:15,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:15,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611817952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:15,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:46:15,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-12-14 12:46:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16561578] [2022-12-14 12:46:15,459 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:46:15,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:46:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:46:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:46:15,461 INFO L87 Difference]: Start difference. First operand 99 states and 147 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:46:15,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:15,666 INFO L93 Difference]: Finished difference Result 113 states and 165 transitions. [2022-12-14 12:46:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:46:15,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-12-14 12:46:15,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:15,668 INFO L225 Difference]: With dead ends: 113 [2022-12-14 12:46:15,668 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 12:46:15,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:46:15,669 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 84 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:15,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 481 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 12:46:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-12-14 12:46:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 81 states have internal predecessors, (90), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (46), 15 states have call predecessors, (46), 14 states have call successors, (46) [2022-12-14 12:46:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 151 transitions. [2022-12-14 12:46:15,679 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 151 transitions. Word has length 63 [2022-12-14 12:46:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:15,679 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 151 transitions. [2022-12-14 12:46:15,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:46:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 151 transitions. [2022-12-14 12:46:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 12:46:15,680 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:15,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:15,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-12-14 12:46:15,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-14 12:46:16,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-12-14 12:46:16,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:16,282 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 2 times [2022-12-14 12:46:16,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:16,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502622359] [2022-12-14 12:46:16,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:16,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:16,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:16,287 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:16,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 12:46:16,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:16,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:16,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:16,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502622359] [2022-12-14 12:46:16,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502622359] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774159085] [2022-12-14 12:46:16,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:16,511 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:46:16,511 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:46:16,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 12:46:16,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:16,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:46:16,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:16,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:16,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774159085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752193847] [2022-12-14 12:46:16,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:16,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:16,731 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:16,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 12:46:16,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:16,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:16,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:16,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:16,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:16,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752193847] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:16,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:46:16,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-12-14 12:46:16,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446254185] [2022-12-14 12:46:16,920 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:46:16,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:46:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:16,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:46:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:46:16,920 INFO L87 Difference]: Start difference. First operand 102 states and 151 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:46:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:17,154 INFO L93 Difference]: Finished difference Result 115 states and 169 transitions. [2022-12-14 12:46:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:46:17,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-12-14 12:46:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:17,156 INFO L225 Difference]: With dead ends: 115 [2022-12-14 12:46:17,156 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 12:46:17,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:46:17,157 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 83 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:17,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 495 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 12:46:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-12-14 12:46:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 81 states have internal predecessors, (90), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45) [2022-12-14 12:46:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 150 transitions. [2022-12-14 12:46:17,165 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 150 transitions. Word has length 63 [2022-12-14 12:46:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:17,166 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 150 transitions. [2022-12-14 12:46:17,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:46:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 150 transitions. [2022-12-14 12:46:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 12:46:17,167 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:17,167 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:17,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-14 12:46:17,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-12-14 12:46:17,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 12:46:17,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:17,770 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:17,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2022-12-14 12:46:17,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:17,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213797590] [2022-12-14 12:46:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:17,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:17,773 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:17,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 12:46:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:17,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:17,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:17,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:18,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:18,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213797590] [2022-12-14 12:46:18,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213797590] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:18,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829451345] [2022-12-14 12:46:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:18,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:18,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:46:18,044 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:46:18,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 12:46:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:18,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:18,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:18,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:18,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829451345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:18,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357699246] [2022-12-14 12:46:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:18,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:18,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:18,232 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:18,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 12:46:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:18,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:18,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:18,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357699246] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:18,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:46:18,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-12-14 12:46:18,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229957713] [2022-12-14 12:46:18,385 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:46:18,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:46:18,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:46:18,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:46:18,386 INFO L87 Difference]: Start difference. First operand 102 states and 150 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:46:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:18,569 INFO L93 Difference]: Finished difference Result 113 states and 161 transitions. [2022-12-14 12:46:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:46:18,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-12-14 12:46:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:18,570 INFO L225 Difference]: With dead ends: 113 [2022-12-14 12:46:18,570 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 12:46:18,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:46:18,571 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 75 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:18,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 583 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 12:46:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-12-14 12:46:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 78 states have internal predecessors, (87), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (41), 15 states have call predecessors, (41), 14 states have call successors, (41) [2022-12-14 12:46:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 143 transitions. [2022-12-14 12:46:18,579 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 143 transitions. Word has length 65 [2022-12-14 12:46:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:18,579 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 143 transitions. [2022-12-14 12:46:18,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:46:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 143 transitions. [2022-12-14 12:46:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 12:46:18,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:18,580 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:18,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 12:46:18,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-14 12:46:18,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 12:46:19,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:19,182 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1269391674, now seen corresponding path program 2 times [2022-12-14 12:46:19,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:19,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379929060] [2022-12-14 12:46:19,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:19,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:19,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:19,186 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:19,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 12:46:19,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:19,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:19,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:19,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:19,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:19,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379929060] [2022-12-14 12:46:19,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379929060] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [835049810] [2022-12-14 12:46:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:19,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:19,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:46:19,429 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:46:19,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 12:46:19,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:19,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:19,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [835049810] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925264948] [2022-12-14 12:46:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:19,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:19,630 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:19,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 12:46:19,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:19,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:19,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:46:19,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:19,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:19,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925264948] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:19,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:46:19,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-12-14 12:46:19,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818071263] [2022-12-14 12:46:19,803 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:46:19,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:46:19,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:46:19,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:46:19,803 INFO L87 Difference]: Start difference. First operand 99 states and 143 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:46:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:19,922 INFO L93 Difference]: Finished difference Result 110 states and 154 transitions. [2022-12-14 12:46:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:46:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-12-14 12:46:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:19,923 INFO L225 Difference]: With dead ends: 110 [2022-12-14 12:46:19,923 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 12:46:19,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:46:19,924 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 105 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:19,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 373 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 12:46:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-12-14 12:46:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 75 states have internal predecessors, (84), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2022-12-14 12:46:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2022-12-14 12:46:19,932 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 138 transitions. Word has length 65 [2022-12-14 12:46:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:19,932 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 138 transitions. [2022-12-14 12:46:19,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:46:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 138 transitions. [2022-12-14 12:46:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 12:46:19,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:19,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-12-14 12:46:19,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-12-14 12:46:20,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 12:46:20,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-12-14 12:46:20,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:20,535 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:20,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 1 times [2022-12-14 12:46:20,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:20,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761814733] [2022-12-14 12:46:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:20,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:20,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:20,539 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:20,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 12:46:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:20,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:20,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:21,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:23,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:23,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761814733] [2022-12-14 12:46:23,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761814733] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:23,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [793621483] [2022-12-14 12:46:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:23,603 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:23,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:46:23,603 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:46:23,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 12:46:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:23,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 12:46:23,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:24,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:25,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [793621483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:25,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584844804] [2022-12-14 12:46:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:25,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:25,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:25,237 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:25,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 12:46:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:25,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:25,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:25,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:26,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584844804] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:26,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:46:26,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 16, 15, 16] total 30 [2022-12-14 12:46:26,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802741291] [2022-12-14 12:46:26,347 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:46:26,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 12:46:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:26,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 12:46:26,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:46:26,348 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 12:46:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:31,958 INFO L93 Difference]: Finished difference Result 163 states and 228 transitions. [2022-12-14 12:46:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 12:46:31,960 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2022-12-14 12:46:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:31,961 INFO L225 Difference]: With dead ends: 163 [2022-12-14 12:46:31,961 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 12:46:31,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 393 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 12:46:31,962 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 195 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:31,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1102 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 12:46:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 12:46:31,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-12-14 12:46:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.180722891566265) internal successors, (98), 88 states have internal predecessors, (98), 18 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (51), 18 states have call predecessors, (51), 17 states have call successors, (51) [2022-12-14 12:46:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 167 transitions. [2022-12-14 12:46:31,972 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 167 transitions. Word has length 72 [2022-12-14 12:46:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:31,972 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 167 transitions. [2022-12-14 12:46:31,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 12:46:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 167 transitions. [2022-12-14 12:46:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 12:46:31,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:31,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-12-14 12:46:31,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-12-14 12:46:32,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 12:46:32,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-14 12:46:32,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:32,576 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:32,577 INFO L85 PathProgramCache]: Analyzing trace with hash -784876239, now seen corresponding path program 2 times [2022-12-14 12:46:32,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:32,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95328243] [2022-12-14 12:46:32,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:32,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:32,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:32,580 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:32,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 12:46:32,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:32,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:32,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:33,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:35,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:35,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95328243] [2022-12-14 12:46:35,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95328243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:35,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2061410015] [2022-12-14 12:46:35,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:35,657 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:35,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:46:35,658 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:46:35,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 12:46:35,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:35,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:35,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:35,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:36,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2061410015] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:36,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541880212] [2022-12-14 12:46:36,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:36,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:36,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:36,837 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:36,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 12:46:36,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:36,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:36,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:36,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:37,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:37,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541880212] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:37,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:46:37,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2022-12-14 12:46:37,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013177027] [2022-12-14 12:46:37,981 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:46:37,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 12:46:37,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:37,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 12:46:37,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-12-14 12:46:37,983 INFO L87 Difference]: Start difference. First operand 113 states and 167 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 12:46:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:43,704 INFO L93 Difference]: Finished difference Result 182 states and 254 transitions. [2022-12-14 12:46:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 12:46:43,706 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2022-12-14 12:46:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:43,706 INFO L225 Difference]: With dead ends: 182 [2022-12-14 12:46:43,706 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 12:46:43,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 394 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=484, Invalid=2168, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 12:46:43,707 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 222 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:43,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 978 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 12:46:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 12:46:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2022-12-14 12:46:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 95 states have (on average 1.168421052631579) internal successors, (111), 100 states have internal predecessors, (111), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (53), 20 states have call predecessors, (53), 19 states have call successors, (53) [2022-12-14 12:46:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 184 transitions. [2022-12-14 12:46:43,725 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 184 transitions. Word has length 72 [2022-12-14 12:46:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:43,725 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 184 transitions. [2022-12-14 12:46:43,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 12:46:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 184 transitions. [2022-12-14 12:46:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 12:46:43,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:43,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-12-14 12:46:43,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-12-14 12:46:43,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 12:46:44,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 12:46:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:44,328 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1250321149, now seen corresponding path program 1 times [2022-12-14 12:46:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503916566] [2022-12-14 12:46:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:44,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:44,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:44,334 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:44,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-12-14 12:46:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:45,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:47,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:47,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503916566] [2022-12-14 12:46:47,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503916566] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:47,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575391293] [2022-12-14 12:46:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:47,321 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:47,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:46:47,322 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:46:47,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 12:46:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:47,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:47,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:47,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:48,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575391293] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442232085] [2022-12-14 12:46:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:48,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:48,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:48,403 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:48,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 12:46:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:48,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:49,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442232085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:49,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:46:49,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2022-12-14 12:46:49,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136371422] [2022-12-14 12:46:49,335 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:46:49,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 12:46:49,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:49,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 12:46:49,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-12-14 12:46:49,336 INFO L87 Difference]: Start difference. First operand 128 states and 184 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 12:46:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:52,656 INFO L93 Difference]: Finished difference Result 160 states and 220 transitions. [2022-12-14 12:46:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:46:52,657 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2022-12-14 12:46:52,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:52,658 INFO L225 Difference]: With dead ends: 160 [2022-12-14 12:46:52,658 INFO L226 Difference]: Without dead ends: 140 [2022-12-14 12:46:52,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=381, Invalid=1511, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:46:52,660 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 163 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:52,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 840 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:46:52,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-14 12:46:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-12-14 12:46:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 101 states have internal predecessors, (113), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (48), 20 states have call predecessors, (48), 19 states have call successors, (48) [2022-12-14 12:46:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 181 transitions. [2022-12-14 12:46:52,675 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 181 transitions. Word has length 74 [2022-12-14 12:46:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:52,675 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 181 transitions. [2022-12-14 12:46:52,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 12:46:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 181 transitions. [2022-12-14 12:46:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 12:46:52,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:52,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:46:52,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-12-14 12:46:52,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 12:46:53,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-12-14 12:46:53,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:53,278 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash 359389810, now seen corresponding path program 1 times [2022-12-14 12:46:53,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:53,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404683996] [2022-12-14 12:46:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:53,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:53,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:53,281 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:53,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 12:46:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:46:53,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:46:53,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:46:53,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:53,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404683996] [2022-12-14 12:46:53,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404683996] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:53,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:53,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:46:53,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852588277] [2022-12-14 12:46:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:53,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:46:53,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:46:53,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:46:53,440 INFO L87 Difference]: Start difference. First operand 130 states and 181 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:46:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:53,533 INFO L93 Difference]: Finished difference Result 144 states and 196 transitions. [2022-12-14 12:46:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:46:53,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-12-14 12:46:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:53,534 INFO L225 Difference]: With dead ends: 144 [2022-12-14 12:46:53,534 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 12:46:53,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:46:53,535 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 7 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:53,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 349 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 12:46:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-12-14 12:46:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 101 states have internal predecessors, (113), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2022-12-14 12:46:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 178 transitions. [2022-12-14 12:46:53,552 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 178 transitions. Word has length 74 [2022-12-14 12:46:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:53,552 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 178 transitions. [2022-12-14 12:46:53,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:46:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 178 transitions. [2022-12-14 12:46:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 12:46:53,553 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:53,553 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-12-14 12:46:53,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-12-14 12:46:53,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:53,755 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1455113153, now seen corresponding path program 2 times [2022-12-14 12:46:53,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:46:53,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849436830] [2022-12-14 12:46:53,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:53,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:46:53,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:46:53,761 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:46:53,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-12-14 12:46:53,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:53,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:53,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:53,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:54,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:56,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:46:56,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849436830] [2022-12-14 12:46:56,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849436830] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:56,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1973296786] [2022-12-14 12:46:56,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:56,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:46:56,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:46:56,749 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:46:56,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-12-14 12:46:56,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:56,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:57,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:57,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1973296786] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:57,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685846497] [2022-12-14 12:46:57,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:46:57,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:57,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:57,941 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:57,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 12:46:57,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:46:57,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:46:58,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:46:58,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 12:46:58,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:46:59,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685846497] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:59,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:46:59,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2022-12-14 12:46:59,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381514106] [2022-12-14 12:46:59,020 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:46:59,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 12:46:59,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:46:59,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 12:46:59,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-12-14 12:46:59,021 INFO L87 Difference]: Start difference. First operand 130 states and 178 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 12:47:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:02,871 INFO L93 Difference]: Finished difference Result 162 states and 213 transitions. [2022-12-14 12:47:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:47:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2022-12-14 12:47:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:02,874 INFO L225 Difference]: With dead ends: 162 [2022-12-14 12:47:02,874 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 12:47:02,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:47:02,876 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 165 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:02,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 867 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:47:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 12:47:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2022-12-14 12:47:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 107 states have internal predecessors, (121), 21 states have call successors, (21), 9 states have call predecessors, (21), 12 states have return successors, (43), 21 states have call predecessors, (43), 20 states have call successors, (43) [2022-12-14 12:47:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 185 transitions. [2022-12-14 12:47:02,892 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 185 transitions. Word has length 74 [2022-12-14 12:47:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:02,892 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 185 transitions. [2022-12-14 12:47:02,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 12:47:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 185 transitions. [2022-12-14 12:47:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 12:47:02,893 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:02,893 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 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] [2022-12-14 12:47:02,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-12-14 12:47:03,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-12-14 12:47:03,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-12-14 12:47:03,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:47:03,496 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:03,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2068625504, now seen corresponding path program 1 times [2022-12-14 12:47:03,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:47:03,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011129277] [2022-12-14 12:47:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:03,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:47:03,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:47:03,501 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:47:03,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-12-14 12:47:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:03,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:47:03,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:47:04,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:47:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:47:06,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:47:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011129277] [2022-12-14 12:47:06,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011129277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:47:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [729221237] [2022-12-14 12:47:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:06,146 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:47:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:47:06,147 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:47:06,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-12-14 12:47:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:06,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:47:06,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:47:06,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:47:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:47:07,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [729221237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:47:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393273631] [2022-12-14 12:47:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:07,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:07,080 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:07,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-14 12:47:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 12:47:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:47:08,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:47:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 12:47:09,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393273631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:47:09,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:47:09,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 15, 18, 19] total 39 [2022-12-14 12:47:09,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127915841] [2022-12-14 12:47:09,861 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:47:09,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 12:47:09,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:47:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 12:47:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 12:47:09,863 INFO L87 Difference]: Start difference. First operand 138 states and 185 transitions. Second operand has 39 states, 37 states have (on average 2.135135135135135) internal successors, (79), 39 states have internal predecessors, (79), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-12-14 12:47:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:15,323 INFO L93 Difference]: Finished difference Result 159 states and 207 transitions. [2022-12-14 12:47:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 12:47:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.135135135135135) internal successors, (79), 39 states have internal predecessors, (79), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 78 [2022-12-14 12:47:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:15,325 INFO L225 Difference]: With dead ends: 159 [2022-12-14 12:47:15,325 INFO L226 Difference]: Without dead ends: 130 [2022-12-14 12:47:15,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=530, Invalid=3010, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 12:47:15,326 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 183 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:15,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 993 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 12:47:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-14 12:47:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2022-12-14 12:47:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 95 states have internal predecessors, (106), 19 states have call successors, (19), 8 states have call predecessors, (19), 11 states have return successors, (37), 19 states have call predecessors, (37), 18 states have call successors, (37) [2022-12-14 12:47:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2022-12-14 12:47:15,344 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 78 [2022-12-14 12:47:15,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:15,345 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2022-12-14 12:47:15,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.135135135135135) internal successors, (79), 39 states have internal predecessors, (79), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-12-14 12:47:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2022-12-14 12:47:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 12:47:15,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:15,346 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-12-14 12:47:15,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-12-14 12:47:15,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-12-14 12:47:15,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-12-14 12:47:15,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:47:15,947 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1678929915, now seen corresponding path program 1 times [2022-12-14 12:47:15,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:47:15,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553079754] [2022-12-14 12:47:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:15,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:47:15,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:47:15,950 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:47:15,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-12-14 12:47:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:16,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 12:47:16,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:47:18,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:47:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:47:27,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:47:27,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553079754] [2022-12-14 12:47:27,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553079754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:47:27,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1185419775] [2022-12-14 12:47:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:27,579 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:47:27,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:47:27,579 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:47:27,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-12-14 12:47:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:47:27,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:47:29,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:47:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:47:36,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1185419775] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:47:36,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084636852] [2022-12-14 12:47:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:36,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:36,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:36,247 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:36,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-14 12:47:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:36,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 12:47:36,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:47:37,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:47:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 12:47:42,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084636852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:47:42,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:47:42,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 18, 18, 24, 26] total 73 [2022-12-14 12:47:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510439494] [2022-12-14 12:47:42,775 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:47:42,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 12:47:42,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:47:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 12:47:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=4629, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 12:47:42,778 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 70 states have internal predecessors, (115), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 12:48:12,718 WARN L233 SmtUtils]: Spent 23.66s on a formula simplification. DAG size of input: 90 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:48:41,770 WARN L233 SmtUtils]: Spent 21.86s on a formula simplification. DAG size of input: 96 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:49:08,519 WARN L233 SmtUtils]: Spent 24.27s on a formula simplification. DAG size of input: 102 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:49:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:15,650 INFO L93 Difference]: Finished difference Result 156 states and 201 transitions. [2022-12-14 12:49:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 12:49:15,652 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 70 states have internal predecessors, (115), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) Word has length 81 [2022-12-14 12:49:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:15,652 INFO L225 Difference]: With dead ends: 156 [2022-12-14 12:49:15,652 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 12:49:15,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 407 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 106.1s TimeCoverageRelationStatistics Valid=1319, Invalid=8781, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 12:49:15,654 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 258 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:15,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1478 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-12-14 12:49:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 12:49:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 127. [2022-12-14 12:49:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 97 states have internal predecessors, (109), 20 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (36), 21 states have call predecessors, (36), 19 states have call successors, (36) [2022-12-14 12:49:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2022-12-14 12:49:15,675 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 81 [2022-12-14 12:49:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:15,675 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2022-12-14 12:49:15,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 70 states have internal predecessors, (115), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-12-14 12:49:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2022-12-14 12:49:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 12:49:15,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:15,676 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 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] [2022-12-14 12:49:15,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-12-14 12:49:15,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-14 12:49:16,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-12-14 12:49:16,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:49:16,278 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:16,280 INFO L85 PathProgramCache]: Analyzing trace with hash -823382364, now seen corresponding path program 2 times [2022-12-14 12:49:16,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:49:16,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30980093] [2022-12-14 12:49:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:49:16,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:49:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:49:16,282 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:49:16,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-12-14 12:49:16,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:49:16,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:49:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:49:16,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:49:17,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:49:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:49:18,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:49:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30980093] [2022-12-14 12:49:18,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30980093] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:49:18,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [371144067] [2022-12-14 12:49:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:49:18,792 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:49:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:49:18,793 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:49:18,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-12-14 12:49:18,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:49:18,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:49:18,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:49:18,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:49:19,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:49:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:49:19,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [371144067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:49:19,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936102240] [2022-12-14 12:49:19,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:49:19,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:19,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:19,793 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:19,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-14 12:49:19,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:49:19,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:49:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 12:49:19,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:49:20,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:49:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 12:49:22,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936102240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:49:22,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:49:22,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14, 15, 18, 19] total 41 [2022-12-14 12:49:22,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935705706] [2022-12-14 12:49:22,657 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:49:22,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 12:49:22,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:49:22,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 12:49:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 12:49:22,658 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 41 states have internal predecessors, (82), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-12-14 12:49:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:29,461 INFO L93 Difference]: Finished difference Result 150 states and 189 transitions. [2022-12-14 12:49:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 12:49:29,462 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 41 states have internal predecessors, (82), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 78 [2022-12-14 12:49:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:29,463 INFO L225 Difference]: With dead ends: 150 [2022-12-14 12:49:29,463 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 12:49:29,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=616, Invalid=3544, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 12:49:29,464 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 161 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:29,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1281 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 12:49:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 12:49:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2022-12-14 12:49:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 17 states have call successors, (17), 6 states have call predecessors, (17), 10 states have return successors, (32), 18 states have call predecessors, (32), 16 states have call successors, (32) [2022-12-14 12:49:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2022-12-14 12:49:29,479 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 78 [2022-12-14 12:49:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:29,480 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2022-12-14 12:49:29,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 41 states have internal predecessors, (82), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-12-14 12:49:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2022-12-14 12:49:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 12:49:29,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:29,481 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-12-14 12:49:29,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-12-14 12:49:29,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-14 12:49:29,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-12-14 12:49:30,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:49:30,082 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2063078729, now seen corresponding path program 2 times [2022-12-14 12:49:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:49:30,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963280098] [2022-12-14 12:49:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:49:30,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:49:30,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:49:30,088 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:49:30,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-12-14 12:49:30,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:49:30,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:49:30,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:49:30,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:49:31,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:49:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:49:36,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:49:36,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963280098] [2022-12-14 12:49:36,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963280098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:49:36,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313480445] [2022-12-14 12:49:36,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:49:36,009 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:49:36,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:49:36,010 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:49:36,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-12-14 12:49:36,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:49:36,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:49:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:49:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:49:36,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:49:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:49:37,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [313480445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:49:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464788552] [2022-12-14 12:49:37,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:49:37,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:37,725 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:37,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-14 12:49:37,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:49:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:49:37,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 12:49:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:49:40,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:49:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:49:52,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464788552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:49:52,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:49:52,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 22, 24] total 66 [2022-12-14 12:49:52,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300294408] [2022-12-14 12:49:52,022 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:49:52,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-14 12:49:52,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:49:52,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-14 12:49:52,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3727, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 12:49:52,024 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand has 66 states, 64 states have (on average 1.625) internal successors, (104), 63 states have internal predecessors, (104), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 12:50:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:15,045 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2022-12-14 12:50:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 12:50:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.625) internal successors, (104), 63 states have internal predecessors, (104), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 81 [2022-12-14 12:50:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:15,047 INFO L225 Difference]: With dead ends: 152 [2022-12-14 12:50:15,047 INFO L226 Difference]: Without dead ends: 131 [2022-12-14 12:50:15,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=1323, Invalid=7797, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 12:50:15,049 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 250 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:15,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1358 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-12-14 12:50:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-14 12:50:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2022-12-14 12:50:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 86 states have internal predecessors, (97), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (31), 19 states have call predecessors, (31), 17 states have call successors, (31) [2022-12-14 12:50:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-12-14 12:50:15,068 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 81 [2022-12-14 12:50:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:15,068 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-12-14 12:50:15,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.625) internal successors, (104), 63 states have internal predecessors, (104), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 12:50:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-12-14 12:50:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 12:50:15,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:15,069 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-12-14 12:50:15,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-12-14 12:50:15,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-14 12:50:15,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2022-12-14 12:50:15,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:50:15,671 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1451945505, now seen corresponding path program 1 times [2022-12-14 12:50:15,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:50:15,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165317651] [2022-12-14 12:50:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:15,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:50:15,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:50:15,678 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:50:15,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-12-14 12:50:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 12:50:15,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:50:17,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:50:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:24,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:50:24,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165317651] [2022-12-14 12:50:24,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165317651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:50:24,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2076766768] [2022-12-14 12:50:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:24,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:50:24,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:50:24,190 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:50:24,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-12-14 12:50:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:24,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 12:50:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:50:26,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:50:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:30,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2076766768] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:50:30,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661591056] [2022-12-14 12:50:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:30,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:30,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:30,539 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:30,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-14 12:50:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 12:50:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:50:31,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:50:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:34,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661591056] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:50:34,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:50:34,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 18, 17, 22, 24] total 63 [2022-12-14 12:50:34,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162558794] [2022-12-14 12:50:34,581 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:50:34,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-14 12:50:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:50:34,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-14 12:50:34,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3524, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 12:50:34,583 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2022-12-14 12:50:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:53,533 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2022-12-14 12:50:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 12:50:53,534 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) Word has length 79 [2022-12-14 12:50:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:53,535 INFO L225 Difference]: With dead ends: 156 [2022-12-14 12:50:53,535 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 12:50:53,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 404 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=1334, Invalid=8968, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 12:50:53,537 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 223 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:53,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1354 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-14 12:50:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 12:50:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2022-12-14 12:50:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 94 states have internal predecessors, (107), 19 states have call successors, (19), 8 states have call predecessors, (19), 10 states have return successors, (30), 20 states have call predecessors, (30), 18 states have call successors, (30) [2022-12-14 12:50:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-12-14 12:50:53,556 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 79 [2022-12-14 12:50:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:53,557 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-12-14 12:50:53,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2022-12-14 12:50:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-12-14 12:50:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 12:50:53,557 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:53,557 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-12-14 12:50:53,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-12-14 12:50:53,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-12-14 12:50:53,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-12-14 12:50:54,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:50:54,159 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash -476190709, now seen corresponding path program 1 times [2022-12-14 12:50:54,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:50:54,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528283872] [2022-12-14 12:50:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:54,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:50:54,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:50:54,165 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:50:54,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-12-14 12:50:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:54,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:50:54,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:54,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:50:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:54,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:50:54,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528283872] [2022-12-14 12:50:54,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528283872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:50:54,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [892964484] [2022-12-14 12:50:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:54,604 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:50:54,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:50:54,605 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:50:54,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-12-14 12:50:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:54,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:50:54,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:54,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:50:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:54,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [892964484] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:50:54,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759249264] [2022-12-14 12:50:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:54,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:54,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:54,897 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:54,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-14 12:50:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:50:54,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:55,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:50:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:50:55,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759249264] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:50:55,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:50:55,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2022-12-14 12:50:55,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284500104] [2022-12-14 12:50:55,170 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:50:55,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:50:55,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:50:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:50:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:50:55,170 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 12:50:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:55,609 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2022-12-14 12:50:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:50:55,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-12-14 12:50:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:55,611 INFO L225 Difference]: With dead ends: 132 [2022-12-14 12:50:55,611 INFO L226 Difference]: Without dead ends: 119 [2022-12-14 12:50:55,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:50:55,612 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 132 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:55,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 603 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:50:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-14 12:50:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-12-14 12:50:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (28), 19 states have call predecessors, (28), 17 states have call successors, (28) [2022-12-14 12:50:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2022-12-14 12:50:55,629 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 82 [2022-12-14 12:50:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:55,629 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2022-12-14 12:50:55,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 12:50:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2022-12-14 12:50:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 12:50:55,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:55,630 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-12-14 12:50:55,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-12-14 12:50:55,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-12-14 12:50:56,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-12-14 12:50:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:50:56,231 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1133603807, now seen corresponding path program 2 times [2022-12-14 12:50:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:50:56,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240652227] [2022-12-14 12:50:56,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:50:56,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:50:56,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:50:56,237 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:50:56,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-12-14 12:50:56,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:50:56,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:50:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:50:56,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:50:57,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:51:01,804 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:51:01,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240652227] [2022-12-14 12:51:01,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240652227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:01,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028970266] [2022-12-14 12:51:01,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:51:01,805 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:51:01,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:51:01,806 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:51:01,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-12-14 12:51:01,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:51:01,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:51:01,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:51:01,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:51:02,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:51:03,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1028970266] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:03,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069378206] [2022-12-14 12:51:03,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:51:03,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:03,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:03,328 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:03,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-14 12:51:03,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:51:03,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:51:03,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 12:51:03,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:51:06,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:51:11,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069378206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:11,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:51:11,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 22, 24] total 58 [2022-12-14 12:51:11,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727851474] [2022-12-14 12:51:11,965 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:51:11,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 12:51:11,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:51:11,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 12:51:11,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2974, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 12:51:11,967 INFO L87 Difference]: Start difference. First operand 119 states and 150 transitions. Second operand has 58 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 12:51:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:32,029 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2022-12-14 12:51:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 12:51:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 79 [2022-12-14 12:51:32,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:32,031 INFO L225 Difference]: With dead ends: 162 [2022-12-14 12:51:32,031 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 12:51:32,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=1220, Invalid=8286, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 12:51:32,032 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 205 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:32,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1506 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-14 12:51:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 12:51:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2022-12-14 12:51:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-12-14 12:51:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-12-14 12:51:32,051 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 79 [2022-12-14 12:51:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:32,051 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-12-14 12:51:32,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 12:51:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-12-14 12:51:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 12:51:32,052 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:32,052 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-12-14 12:51:32,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-12-14 12:51:32,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-12-14 12:51:32,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-12-14 12:51:32,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:51:32,654 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash -514341681, now seen corresponding path program 2 times [2022-12-14 12:51:32,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:51:32,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055572424] [2022-12-14 12:51:32,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:51:32,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:51:32,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:51:32,660 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:51:32,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-12-14 12:51:32,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:51:32,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:51:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:51:32,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:51:32,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:51:33,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:51:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055572424] [2022-12-14 12:51:33,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055572424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:33,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2043009694] [2022-12-14 12:51:33,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:51:33,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:51:33,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:51:33,174 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:51:33,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-12-14 12:51:33,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:51:33,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:51:33,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:51:33,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:51:33,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:51:33,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2043009694] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:33,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409926976] [2022-12-14 12:51:33,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:51:33,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:33,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:33,517 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:33,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-14 12:51:33,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:51:33,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:51:33,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:51:33,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:51:33,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:51:33,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409926976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:33,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:51:33,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2022-12-14 12:51:33,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405600525] [2022-12-14 12:51:33,836 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:51:33,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:51:33,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:51:33,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:51:33,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:51:33,837 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 12:51:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:34,333 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2022-12-14 12:51:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:51:34,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-12-14 12:51:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:34,334 INFO L225 Difference]: With dead ends: 125 [2022-12-14 12:51:34,334 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 12:51:34,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:51:34,335 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 111 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:34,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 615 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 12:51:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2022-12-14 12:51:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-12-14 12:51:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-12-14 12:51:34,351 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 82 [2022-12-14 12:51:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:34,351 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-12-14 12:51:34,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 12:51:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-12-14 12:51:34,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 12:51:34,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:34,352 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:51:34,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2022-12-14 12:51:34,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-12-14 12:51:34,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-12-14 12:51:34,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:51:34,954 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1357497146, now seen corresponding path program 1 times [2022-12-14 12:51:34,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:51:34,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257165380] [2022-12-14 12:51:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:34,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:51:34,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:51:34,959 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:51:34,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-12-14 12:51:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:35,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 12:51:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:51:38,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:51:47,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:51:47,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257165380] [2022-12-14 12:51:47,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257165380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:47,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209265864] [2022-12-14 12:51:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:47,916 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:51:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:51:47,917 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:51:47,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-12-14 12:51:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:48,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 12:51:48,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:51:48,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:51:50,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209265864] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002285343] [2022-12-14 12:51:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:50,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:50,786 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:50,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-12-14 12:51:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:51,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 12:51:51,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:51:52,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 12:51:57,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002285343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:51:57,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:51:57,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 26, 25] total 52 [2022-12-14 12:51:57,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270493660] [2022-12-14 12:51:57,589 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:51:57,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 12:51:57,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:51:57,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 12:51:57,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2405, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 12:51:57,591 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-12-14 12:52:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:52:25,672 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2022-12-14 12:52:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 12:52:25,675 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 84 [2022-12-14 12:52:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:52:25,675 INFO L225 Difference]: With dead ends: 111 [2022-12-14 12:52:25,675 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 12:52:25,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=710, Invalid=5770, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 12:52:25,677 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 176 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:52:25,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1206 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-12-14 12:52:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 12:52:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-12-14 12:52:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 12:52:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-12-14 12:52:25,694 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 84 [2022-12-14 12:52:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:52:25,694 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-12-14 12:52:25,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-12-14 12:52:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-12-14 12:52:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 12:52:25,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:52:25,695 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:52:25,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-12-14 12:52:25,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-12-14 12:52:26,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2022-12-14 12:52:26,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:52:26,297 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:52:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:52:26,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1014343994, now seen corresponding path program 2 times [2022-12-14 12:52:26,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:52:26,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440941170] [2022-12-14 12:52:26,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:52:26,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:52:26,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:52:26,302 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:52:26,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-12-14 12:52:26,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:52:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:52:26,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 12:52:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:52:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:52:29,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:52:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:52:40,242 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:52:40,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440941170] [2022-12-14 12:52:40,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440941170] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:52:40,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1089831554] [2022-12-14 12:52:40,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:52:40,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:52:40,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:52:40,243 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:52:40,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-12-14 12:52:40,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:52:40,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:52:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 12:52:40,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:52:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:52:41,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:52:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:52:43,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1089831554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:52:43,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482114674] [2022-12-14 12:52:43,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:52:43,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:43,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:52:43,232 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:52:43,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-12-14 12:52:43,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:52:43,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:52:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 12:52:43,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:52:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:52:44,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:52:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 12:52:49,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482114674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:52:49,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:52:49,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 26, 25] total 52 [2022-12-14 12:52:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969735913] [2022-12-14 12:52:49,987 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:52:49,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 12:52:49,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:52:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 12:52:49,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 12:52:49,989 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-12-14 12:53:08,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 12:53:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:17,904 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2022-12-14 12:53:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 12:53:17,906 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 84 [2022-12-14 12:53:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:17,906 INFO L225 Difference]: With dead ends: 108 [2022-12-14 12:53:17,906 INFO L226 Difference]: Without dead ends: 101 [2022-12-14 12:53:17,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=655, Invalid=5507, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 12:53:17,908 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 205 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:17,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1072 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-12-14 12:53:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-14 12:53:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-12-14 12:53:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2022-12-14 12:53:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2022-12-14 12:53:17,927 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 84 [2022-12-14 12:53:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:17,928 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2022-12-14 12:53:17,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-12-14 12:53:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2022-12-14 12:53:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 12:53:17,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:17,928 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:53:17,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-12-14 12:53:18,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-12-14 12:53:18,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (81)] Ended with exit code 0 [2022-12-14 12:53:18,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:53:18,531 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1930237036, now seen corresponding path program 1 times [2022-12-14 12:53:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:53:18,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725621796] [2022-12-14 12:53:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:18,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:53:18,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:53:18,535 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:53:18,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-12-14 12:53:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:53:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:53:19,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:53:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:53:23,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:53:23,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725621796] [2022-12-14 12:53:23,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725621796] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:53:23,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1595045635] [2022-12-14 12:53:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:23,233 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:53:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:53:23,234 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:53:23,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-12-14 12:53:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 12:53:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:53:23,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:53:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:53:25,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1595045635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:53:25,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592313045] [2022-12-14 12:53:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:25,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:25,892 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:53:25,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-12-14 12:53:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:26,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 12:53:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:53:29,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:53:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:53:31,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592313045] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:53:31,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:53:31,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 17, 22, 16] total 50 [2022-12-14 12:53:31,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926510852] [2022-12-14 12:53:31,056 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:53:31,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 12:53:31,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:53:31,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 12:53:31,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2171, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 12:53:31,058 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) [2022-12-14 12:53:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:40,316 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2022-12-14 12:53:40,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 12:53:40,318 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) Word has length 85 [2022-12-14 12:53:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:40,319 INFO L225 Difference]: With dead ends: 119 [2022-12-14 12:53:40,319 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 12:53:40,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=798, Invalid=5364, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 12:53:40,321 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 78 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:40,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 878 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 12:53:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 12:53:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-12-14 12:53:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 64 states have internal predecessors, (71), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-12-14 12:53:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2022-12-14 12:53:40,339 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 85 [2022-12-14 12:53:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:40,339 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2022-12-14 12:53:40,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) [2022-12-14 12:53:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2022-12-14 12:53:40,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 12:53:40,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:40,340 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:53:40,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-12-14 12:53:40,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-12-14 12:53:40,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-12-14 12:53:40,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:53:40,941 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:40,942 INFO L85 PathProgramCache]: Analyzing trace with hash 117576084, now seen corresponding path program 2 times [2022-12-14 12:53:40,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:53:40,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937116450] [2022-12-14 12:53:40,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:53:40,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:53:40,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:53:40,947 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:53:40,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-12-14 12:53:41,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:53:41,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:53:41,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:53:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:53:42,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:53:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:53:45,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:53:45,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937116450] [2022-12-14 12:53:45,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937116450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:53:45,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159578705] [2022-12-14 12:53:45,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:53:45,347 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:53:45,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:53:45,348 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:53:45,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-12-14 12:53:45,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:53:45,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:53:45,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 12:53:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:53:46,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:53:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:53:48,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1159578705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:53:48,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077950524] [2022-12-14 12:53:48,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:53:48,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:48,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:48,376 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:53:48,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-12-14 12:53:48,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:53:48,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:53:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 12:53:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:53:48,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:53:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:53:49,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077950524] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:53:49,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:53:49,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 17, 17, 16] total 35 [2022-12-14 12:53:49,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330641987] [2022-12-14 12:53:49,983 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:53:49,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 12:53:49,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:53:49,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 12:53:49,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 12:53:49,985 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2022-12-14 12:53:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:58,338 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2022-12-14 12:53:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 12:53:58,339 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 85 [2022-12-14 12:53:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:58,340 INFO L225 Difference]: With dead ends: 105 [2022-12-14 12:53:58,340 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 12:53:58,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=546, Invalid=2994, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 12:53:58,340 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 88 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:58,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1089 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 12:53:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 12:53:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-12-14 12:53:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-12-14 12:53:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2022-12-14 12:53:58,350 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 85 [2022-12-14 12:53:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:58,350 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2022-12-14 12:53:58,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2022-12-14 12:53:58,351 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2022-12-14 12:53:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 12:53:58,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:58,351 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:53:58,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-12-14 12:53:58,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-12-14 12:53:58,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-12-14 12:53:58,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:53:58,953 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash 608590994, now seen corresponding path program 1 times [2022-12-14 12:53:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:53:58,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612386771] [2022-12-14 12:53:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:58,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:53:58,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:53:58,956 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:53:58,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-12-14 12:53:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:59,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 12:53:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:54:02,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:54:13,882 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:54:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612386771] [2022-12-14 12:54:13,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612386771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:54:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [479514615] [2022-12-14 12:54:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:13,882 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:54:13,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:54:13,883 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:54:13,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-12-14 12:54:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:14,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 12:54:14,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:54:17,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:54:23,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [479514615] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:54:23,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580357115] [2022-12-14 12:54:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:23,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:23,457 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:23,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-12-14 12:54:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:24,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 12:54:24,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:54:26,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 12:54:43,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580357115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:54:43,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:54:43,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26, 25, 28, 28] total 91 [2022-12-14 12:54:43,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369831658] [2022-12-14 12:54:43,811 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:54:43,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 12:54:43,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:54:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 12:54:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=7722, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 12:54:43,813 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 91 states, 86 states have (on average 1.430232558139535) internal successors, (123), 83 states have internal predecessors, (123), 21 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) [2022-12-14 12:55:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:21,007 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-12-14 12:55:21,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 12:55:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 86 states have (on average 1.430232558139535) internal successors, (123), 83 states have internal predecessors, (123), 21 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) Word has length 86 [2022-12-14 12:55:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:21,009 INFO L225 Difference]: With dead ends: 86 [2022-12-14 12:55:21,009 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 12:55:21,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 420 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=1059, Invalid=12050, Unknown=1, NotChecked=0, Total=13110 [2022-12-14 12:55:21,011 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 156 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:21,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1795 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-12-14 12:55:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 12:55:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-12-14 12:55:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 58 states have internal predecessors, (65), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 12:55:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-12-14 12:55:21,021 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 86 [2022-12-14 12:55:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:21,021 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-12-14 12:55:21,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 86 states have (on average 1.430232558139535) internal successors, (123), 83 states have internal predecessors, (123), 21 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) [2022-12-14 12:55:21,021 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-12-14 12:55:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 12:55:21,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:21,022 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:55:21,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-12-14 12:55:21,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-12-14 12:55:21,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-12-14 12:55:21,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:21,626 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:21,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1561964758, now seen corresponding path program 2 times [2022-12-14 12:55:21,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:55:21,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530470999] [2022-12-14 12:55:21,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:55:21,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:55:21,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:55:21,631 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:55:21,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-12-14 12:55:22,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:55:22,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:55:22,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 12:55:22,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:55:25,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:55:35,959 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:55:35,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530470999] [2022-12-14 12:55:35,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530470999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:35,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [663683631] [2022-12-14 12:55:35,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:55:35,959 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:55:35,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:55:35,960 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:55:35,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-12-14 12:55:36,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:55:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:55:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 12:55:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:55:39,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:55:45,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [663683631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:45,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811081348] [2022-12-14 12:55:45,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:55:45,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:45,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:45,175 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:45,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-12-14 12:55:45,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:55:45,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:55:45,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 12:55:45,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:55:47,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 12:55:53,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811081348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:53,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:55:53,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26, 25, 28, 28] total 71 [2022-12-14 12:55:53,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138576862] [2022-12-14 12:55:53,267 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:55:53,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 12:55:53,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:55:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 12:55:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 12:55:53,268 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 71 states, 67 states have (on average 1.507462686567164) internal successors, (101), 65 states have internal predecessors, (101), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2022-12-14 12:56:21,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:56:21,900 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2022-12-14 12:56:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 12:56:21,902 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 67 states have (on average 1.507462686567164) internal successors, (101), 65 states have internal predecessors, (101), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) Word has length 86 [2022-12-14 12:56:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:56:21,903 INFO L225 Difference]: With dead ends: 74 [2022-12-14 12:56:21,903 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 12:56:21,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 439 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=805, Invalid=7751, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 12:56:21,904 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 142 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:56:21,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1372 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-12-14 12:56:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 12:56:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 12:56:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:56:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 12:56:21,905 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-12-14 12:56:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:56:21,905 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 12:56:21,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 67 states have (on average 1.507462686567164) internal successors, (101), 65 states have internal predecessors, (101), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2022-12-14 12:56:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 12:56:21,905 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 12:56:21,907 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 12:56:21,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-12-14 12:56:22,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-12-14 12:56:22,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-12-14 12:56:22,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f6dc8e-b0e1-4e0b-b094-78a0d0d20a2d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:56:22,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 12:57:14,165 WARN L233 SmtUtils]: Spent 31.07s on a formula simplification. DAG size of input: 303 DAG size of output: 50 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)