./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- 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-b5237d8 [2022-11-22 02:32:09,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:32:09,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:32:09,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:32:09,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:32:09,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:32:09,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:32:09,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:32:09,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:32:09,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:32:09,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:32:09,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:32:09,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:32:09,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:32:09,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:32:09,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:32:09,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:32:09,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:32:09,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:32:09,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:32:09,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:32:09,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:32:09,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:32:09,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:32:09,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:32:09,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:32:09,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:32:09,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:32:09,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:32:09,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:32:09,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:32:09,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:32:09,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:32:09,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:32:09,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:32:09,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:32:09,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:32:09,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:32:09,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:32:09,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:32:09,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:32:09,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:32:09,954 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:32:09,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:32:09,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:32:09,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:32:09,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:32:09,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:32:09,956 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:32:09,956 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:32:09,957 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:32:09,957 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:32:09,958 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:32:09,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:32:09,958 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:32:09,959 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:32:09,959 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:32:09,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:32:09,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:32:09,959 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:32:09,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:32:09,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:32:09,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:32:09,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:32:09,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:32:09,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:32:09,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:32:09,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:32:09,962 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:32:09,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:32:09,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:32:09,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:32:09,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:32:09,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:32:09,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:32:09,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:32:09,964 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:32:09,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:32:09,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:32:09,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:32:09,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:32:09,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:32:09,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:32:09,966 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_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2022-11-22 02:32:10,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:32:10,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:32:10,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:32:10,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:32:10,250 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:32:10,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-22 02:32:13,418 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:32:13,674 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:32:13,675 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-22 02:32:13,689 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/data/99b75178a/c27352797c6e46ad89e9c6f631664862/FLAG0d1292503 [2022-11-22 02:32:13,709 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/data/99b75178a/c27352797c6e46ad89e9c6f631664862 [2022-11-22 02:32:13,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:32:13,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:32:13,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:32:13,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:32:13,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:32:13,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:32:13" (1/1) ... [2022-11-22 02:32:13,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d763df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:13, skipping insertion in model container [2022-11-22 02:32:13,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:32:13" (1/1) ... [2022-11-22 02:32:13,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:32:13,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:32:13,923 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_ef8d8c87-92ff-4740-b3bb-8069344851e9/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-22 02:32:13,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:32:13,983 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:32:13,996 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_ef8d8c87-92ff-4740-b3bb-8069344851e9/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-22 02:32:14,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:32:14,048 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:32:14,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14 WrapperNode [2022-11-22 02:32:14,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:32:14,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:32:14,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:32:14,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:32:14,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,092 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 166 [2022-11-22 02:32:14,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:32:14,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:32:14,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:32:14,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:32:14,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,136 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:32:14,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:32:14,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:32:14,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:32:14,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (1/1) ... [2022-11-22 02:32:14,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:32:14,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:14,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:32:14,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:32:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:32:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:32:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-22 02:32:14,231 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-22 02:32:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:32:14,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:32:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 02:32:14,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 02:32:14,350 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:32:14,367 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:32:14,878 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:32:15,197 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:32:15,197 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:32:15,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:32:15 BoogieIcfgContainer [2022-11-22 02:32:15,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:32:15,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:32:15,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:32:15,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:32:15,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:32:13" (1/3) ... [2022-11-22 02:32:15,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e9128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:32:15, skipping insertion in model container [2022-11-22 02:32:15,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:14" (2/3) ... [2022-11-22 02:32:15,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e9128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:32:15, skipping insertion in model container [2022-11-22 02:32:15,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:32:15" (3/3) ... [2022-11-22 02:32:15,210 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2022-11-22 02:32:15,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:32:15,230 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:32:15,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:32:15,287 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;@2134d60d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:32:15,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:32:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:32:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 02:32:15,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:15,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:32:15,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash 180323042, now seen corresponding path program 1 times [2022-11-22 02:32:15,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:15,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798825661] [2022-11-22 02:32:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:15,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:15,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:15,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798825661] [2022-11-22 02:32:15,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798825661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:15,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666170362] [2022-11-22 02:32:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:15,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:15,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:15,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:15,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:32:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:15,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:32:15,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:32:16,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:32:16,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666170362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:16,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864378440] [2022-11-22 02:32:16,768 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-22 02:32:16,768 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:32:16,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:32:16,777 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:32:16,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:32:16,954 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 58 for LOIs [2022-11-22 02:32:17,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:32:18,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [864378440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:32:18,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:32:18,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 13, 11] total 30 [2022-11-22 02:32:18,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954067443] [2022-11-22 02:32:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:32:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:32:18,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:18,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:32:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:32:18,275 INFO L87 Difference]: Start difference. First operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 02:32:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:18,713 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2022-11-22 02:32:18,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:32:18,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-11-22 02:32:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:18,729 INFO L225 Difference]: With dead ends: 108 [2022-11-22 02:32:18,729 INFO L226 Difference]: Without dead ends: 65 [2022-11-22 02:32:18,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:32:18,740 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:18,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 188 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:32:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-22 02:32:18,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2022-11-22 02:32:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 40 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-22 02:32:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-11-22 02:32:18,805 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 32 [2022-11-22 02:32:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:18,806 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-11-22 02:32:18,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 02:32:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-11-22 02:32:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:32:18,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:18,811 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:32:18,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 02:32:19,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:19,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:19,019 INFO L85 PathProgramCache]: Analyzing trace with hash -230218276, now seen corresponding path program 1 times [2022-11-22 02:32:19,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:19,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903193777] [2022-11-22 02:32:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:19,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903193777] [2022-11-22 02:32:19,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903193777] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331563499] [2022-11-22 02:32:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:19,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:19,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:19,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:19,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:32:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:32:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:32:19,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:32:19,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331563499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:19,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [125661086] [2022-11-22 02:32:19,907 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:32:19,908 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:32:19,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:32:19,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:32:19,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:32:20,390 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:32:20,402 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-22 02:32:20,496 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:32:22,565 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '709#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 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 [2022-11-22 02:32:22,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:32:22,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:32:22,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 11] total 24 [2022-11-22 02:32:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696740079] [2022-11-22 02:32:22,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:32:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:32:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:32:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 02:32:22,568 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:32:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:23,331 INFO L93 Difference]: Finished difference Result 146 states and 203 transitions. [2022-11-22 02:32:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:32:23,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-11-22 02:32:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:23,336 INFO L225 Difference]: With dead ends: 146 [2022-11-22 02:32:23,337 INFO L226 Difference]: Without dead ends: 92 [2022-11-22 02:32:23,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 02:32:23,341 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 89 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:23,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 512 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:32:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-22 02:32:23,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 59. [2022-11-22 02:32:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 02:32:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2022-11-22 02:32:23,383 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 37 [2022-11-22 02:32:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:23,383 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2022-11-22 02:32:23,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:32:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2022-11-22 02:32:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 02:32:23,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:23,388 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1] [2022-11-22 02:32:23,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:23,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:23,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash -609212497, now seen corresponding path program 1 times [2022-11-22 02:32:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:23,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952973735] [2022-11-22 02:32:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:23,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:23,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952973735] [2022-11-22 02:32:23,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952973735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153105572] [2022-11-22 02:32:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:23,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:23,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:23,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:32:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:23,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:32:23,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:32:23,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:23,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153105572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669611574] [2022-11-22 02:32:23,997 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:32:23,997 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:32:23,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:32:23,998 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:32:23,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:32:24,604 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-22 02:32:24,680 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:32:25,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [669611574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:32:25,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:32:25,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [5, 5, 5] total 27 [2022-11-22 02:32:25,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130773162] [2022-11-22 02:32:25,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:32:25,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:32:25,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:32:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:32:25,716 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:32:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:26,823 INFO L93 Difference]: Finished difference Result 117 states and 173 transitions. [2022-11-22 02:32:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:32:26,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2022-11-22 02:32:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:26,828 INFO L225 Difference]: With dead ends: 117 [2022-11-22 02:32:26,828 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 02:32:26,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:32:26,829 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:26,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 244 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:32:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 02:32:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2022-11-22 02:32:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-22 02:32:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2022-11-22 02:32:26,863 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 39 [2022-11-22 02:32:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:26,864 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2022-11-22 02:32:26,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:32:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2022-11-22 02:32:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:32:26,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:26,875 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2022-11-22 02:32:26,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:27,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:27,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:27,081 INFO L85 PathProgramCache]: Analyzing trace with hash 650186279, now seen corresponding path program 1 times [2022-11-22 02:32:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:27,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831617897] [2022-11-22 02:32:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:27,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:27,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831617897] [2022-11-22 02:32:27,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831617897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696032292] [2022-11-22 02:32:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:27,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:27,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:27,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:27,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:32:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:27,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:32:27,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:32:27,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 02:32:27,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696032292] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:27,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:32:27,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 10] total 18 [2022-11-22 02:32:27,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209891615] [2022-11-22 02:32:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:32:27,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:32:27,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:27,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:32:27,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:32:27,686 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:32:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:27,795 INFO L93 Difference]: Finished difference Result 87 states and 115 transitions. [2022-11-22 02:32:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:32:27,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-22 02:32:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:27,797 INFO L225 Difference]: With dead ends: 87 [2022-11-22 02:32:27,797 INFO L226 Difference]: Without dead ends: 70 [2022-11-22 02:32:27,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:32:27,799 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 4 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 191 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 [2022-11-22 02:32:27,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 191 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:32:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-22 02:32:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2022-11-22 02:32:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 49 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:32:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2022-11-22 02:32:27,817 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 41 [2022-11-22 02:32:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:27,818 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2022-11-22 02:32:27,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:32:27,818 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2022-11-22 02:32:27,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:32:27,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:27,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-22 02:32:27,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:28,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:28,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:28,025 INFO L85 PathProgramCache]: Analyzing trace with hash -433864368, now seen corresponding path program 1 times [2022-11-22 02:32:28,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:28,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107225271] [2022-11-22 02:32:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:28,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:28,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:28,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107225271] [2022-11-22 02:32:28,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107225271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:28,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310870150] [2022-11-22 02:32:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:28,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:28,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:28,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:32:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:32:28,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:32:28,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:28,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310870150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:28,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [775995020] [2022-11-22 02:32:28,402 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 02:32:28,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:32:28,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:32:28,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:32:28,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:32:28,801 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:32:28,813 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-22 02:32:28,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:32:30,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2261#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 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 [2022-11-22 02:32:30,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:32:30,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:32:30,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-22 02:32:30,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613301281] [2022-11-22 02:32:30,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:32:30,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:32:30,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:30,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:32:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-11-22 02:32:30,556 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:32:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:30,794 INFO L93 Difference]: Finished difference Result 159 states and 222 transitions. [2022-11-22 02:32:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:32:30,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 42 [2022-11-22 02:32:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:30,801 INFO L225 Difference]: With dead ends: 159 [2022-11-22 02:32:30,801 INFO L226 Difference]: Without dead ends: 114 [2022-11-22 02:32:30,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:32:30,803 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:30,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 126 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:32:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-22 02:32:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 69. [2022-11-22 02:32:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 57 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:32:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2022-11-22 02:32:30,848 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 42 [2022-11-22 02:32:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:30,849 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2022-11-22 02:32:30,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:32:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2022-11-22 02:32:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:32:30,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:30,850 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-22 02:32:30,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 02:32:31,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:31,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1775740888, now seen corresponding path program 1 times [2022-11-22 02:32:31,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:31,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041298692] [2022-11-22 02:32:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:31,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:31,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041298692] [2022-11-22 02:32:31,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041298692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:31,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577981571] [2022-11-22 02:32:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:31,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:31,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:31,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:31,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:32:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:32:31,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:32:31,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:31,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577981571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:31,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462040982] [2022-11-22 02:32:31,475 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 02:32:31,475 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:32:31,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:32:31,475 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:32:31,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:32:31,907 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:32:31,916 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-22 02:32:32,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:32:33,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2875#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 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 [2022-11-22 02:32:33,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:32:33,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:32:33,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-22 02:32:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938808287] [2022-11-22 02:32:33,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:32:33,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:32:33,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:32:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:32:33,799 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:32:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:34,184 INFO L93 Difference]: Finished difference Result 164 states and 226 transitions. [2022-11-22 02:32:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:32:34,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-11-22 02:32:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:34,186 INFO L225 Difference]: With dead ends: 164 [2022-11-22 02:32:34,186 INFO L226 Difference]: Without dead ends: 117 [2022-11-22 02:32:34,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:32:34,188 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 137 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:34,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 118 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:32:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-22 02:32:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2022-11-22 02:32:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:32:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2022-11-22 02:32:34,213 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 44 [2022-11-22 02:32:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:34,214 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2022-11-22 02:32:34,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:32:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2022-11-22 02:32:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:32:34,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:34,215 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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] [2022-11-22 02:32:34,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 02:32:34,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:34,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:34,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2033804048, now seen corresponding path program 2 times [2022-11-22 02:32:34,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:34,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980188187] [2022-11-22 02:32:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:34,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:34,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:34,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980188187] [2022-11-22 02:32:34,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980188187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119653793] [2022-11-22 02:32:34,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:32:34,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:34,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:34,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:32:34,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-22 02:32:34,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:32:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:32:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:32:34,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:34,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119653793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:34,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653574135] [2022-11-22 02:32:35,000 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 02:32:35,000 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:32:35,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:32:35,001 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:32:35,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:32:35,311 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:32:35,319 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-22 02:32:35,432 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:32:37,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3548#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 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 [2022-11-22 02:32:37,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:32:37,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:32:37,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-22 02:32:37,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421187453] [2022-11-22 02:32:37,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:32:37,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:32:37,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:37,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:32:37,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:32:37,041 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:32:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:37,518 INFO L93 Difference]: Finished difference Result 225 states and 320 transitions. [2022-11-22 02:32:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:32:37,521 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-11-22 02:32:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:37,522 INFO L225 Difference]: With dead ends: 225 [2022-11-22 02:32:37,522 INFO L226 Difference]: Without dead ends: 180 [2022-11-22 02:32:37,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=408, Invalid=1484, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:32:37,524 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 146 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:37,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 224 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:32:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-22 02:32:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 87. [2022-11-22 02:32:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.263157894736842) internal successors, (96), 75 states have internal predecessors, (96), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:32:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-11-22 02:32:37,557 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 51 [2022-11-22 02:32:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:37,557 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-11-22 02:32:37,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:32:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-11-22 02:32:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 02:32:37,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:37,559 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 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] [2022-11-22 02:32:37,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:37,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:32:37,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash -846766120, now seen corresponding path program 2 times [2022-11-22 02:32:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:37,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894202685] [2022-11-22 02:32:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:38,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:38,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894202685] [2022-11-22 02:32:38,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894202685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:38,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836186175] [2022-11-22 02:32:38,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:32:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:38,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:38,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:38,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:32:38,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-22 02:32:38,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:32:38,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:32:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:32:38,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:32:38,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836186175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:38,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1967419963] [2022-11-22 02:32:38,689 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 02:32:38,689 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:32:38,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:32:38,690 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:32:38,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:32:39,028 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:32:39,036 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-22 02:32:39,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:32:41,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4376#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 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 [2022-11-22 02:32:41,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:32:41,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:32:41,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-22 02:32:41,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551610760] [2022-11-22 02:32:41,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:32:41,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 02:32:41,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 02:32:41,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 02:32:41,155 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:33:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:33:00,235 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2022-11-22 02:33:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 02:33:00,236 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 56 [2022-11-22 02:33:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:33:00,238 INFO L225 Difference]: With dead ends: 236 [2022-11-22 02:33:00,238 INFO L226 Difference]: Without dead ends: 189 [2022-11-22 02:33:00,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=615, Invalid=2242, Unknown=5, NotChecked=0, Total=2862 [2022-11-22 02:33:00,240 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 187 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:33:00,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 356 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:33:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-22 02:33:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 97. [2022-11-22 02:33:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 85 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:33:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2022-11-22 02:33:00,271 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 56 [2022-11-22 02:33:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:33:00,271 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2022-11-22 02:33:00,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:33:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2022-11-22 02:33:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 02:33:00,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:33:00,273 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 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] [2022-11-22 02:33:00,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:33:00,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:33:00,479 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:33:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:33:00,480 INFO L85 PathProgramCache]: Analyzing trace with hash -967833360, now seen corresponding path program 3 times [2022-11-22 02:33:00,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:33:00,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447888194] [2022-11-22 02:33:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:00,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:33:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:33:00,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:33:00,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447888194] [2022-11-22 02:33:00,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447888194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:33:00,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157361840] [2022-11-22 02:33:00,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:33:00,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:33:00,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:33:00,861 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:33:00,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:33:00,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:33:00,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:33:00,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:33:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:33:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:33:01,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:33:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:33:01,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157361840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:33:01,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697205832] [2022-11-22 02:33:01,624 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 02:33:01,625 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:33:01,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:33:01,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:33:01,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:33:01,918 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:33:01,927 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-22 02:33:02,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:33:03,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5329#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 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 [2022-11-22 02:33:03,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:33:03,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:33:03,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2022-11-22 02:33:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542978504] [2022-11-22 02:33:03,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:33:03,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 02:33:03,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:33:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 02:33:03,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=2274, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 02:33:03,764 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 38 states have internal predecessors, (135), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:33:04,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:33:04,554 INFO L93 Difference]: Finished difference Result 357 states and 516 transitions. [2022-11-22 02:33:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 02:33:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 38 states have internal predecessors, (135), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-11-22 02:33:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:33:04,559 INFO L225 Difference]: With dead ends: 357 [2022-11-22 02:33:04,559 INFO L226 Difference]: Without dead ends: 312 [2022-11-22 02:33:04,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1182, Invalid=3374, Unknown=0, NotChecked=0, Total=4556 [2022-11-22 02:33:04,561 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 253 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:33:04,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 352 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:33:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-22 02:33:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 123. [2022-11-22 02:33:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 111 states have internal predecessors, (136), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:33:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2022-11-22 02:33:04,604 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 69 [2022-11-22 02:33:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:33:04,604 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2022-11-22 02:33:04,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 38 states have internal predecessors, (135), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:33:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2022-11-22 02:33:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 02:33:04,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:33:04,606 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 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] [2022-11-22 02:33:04,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:33:04,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:33:04,807 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:33:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:33:04,807 INFO L85 PathProgramCache]: Analyzing trace with hash 225103832, now seen corresponding path program 3 times [2022-11-22 02:33:04,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:33:04,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182951894] [2022-11-22 02:33:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:04,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:33:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 3 proven. 281 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:33:05,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:33:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182951894] [2022-11-22 02:33:05,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182951894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:33:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121930688] [2022-11-22 02:33:05,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:33:05,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:33:05,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:33:05,435 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:33:05,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:33:05,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:33:05,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:33:05,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 02:33:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:33:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 21 proven. 273 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:33:06,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:33:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 3 proven. 281 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:33:06,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121930688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:33:06,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [770564981] [2022-11-22 02:33:06,984 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 02:33:06,984 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:33:06,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:33:06,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:33:06,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:33:07,306 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:33:07,315 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-22 02:33:07,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:33:10,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6585#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 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 [2022-11-22 02:33:10,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:33:10,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:33:10,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2022-11-22 02:33:10,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012593632] [2022-11-22 02:33:10,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:33:10,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-22 02:33:10,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:33:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-22 02:33:10,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3414, Unknown=0, NotChecked=0, Total=4160 [2022-11-22 02:33:10,060 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 49 states, 49 states have (on average 3.3877551020408165) internal successors, (166), 49 states have internal predecessors, (166), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:34:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:02,503 INFO L93 Difference]: Finished difference Result 320 states and 442 transitions. [2022-11-22 02:34:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-22 02:34:02,511 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.3877551020408165) internal successors, (166), 49 states have internal predecessors, (166), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2022-11-22 02:34:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:02,516 INFO L225 Difference]: With dead ends: 320 [2022-11-22 02:34:02,516 INFO L226 Difference]: Without dead ends: 273 [2022-11-22 02:34:02,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=1723, Invalid=5924, Unknown=9, NotChecked=0, Total=7656 [2022-11-22 02:34:02,519 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 494 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:02,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1102 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 02:34:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-22 02:34:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 127. [2022-11-22 02:34:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:34:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2022-11-22 02:34:02,578 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 80 [2022-11-22 02:34:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:02,578 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2022-11-22 02:34:02,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.3877551020408165) internal successors, (166), 49 states have internal predecessors, (166), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:34:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2022-11-22 02:34:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-22 02:34:02,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:02,583 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 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] [2022-11-22 02:34:02,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:02,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:02,789 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:02,790 INFO L85 PathProgramCache]: Analyzing trace with hash 857334000, now seen corresponding path program 4 times [2022-11-22 02:34:02,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:02,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146433318] [2022-11-22 02:34:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:02,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:34:03,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:03,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146433318] [2022-11-22 02:34:03,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146433318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:03,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098663638] [2022-11-22 02:34:03,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:34:03,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:03,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:03,707 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:03,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:34:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:34:03,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 20 proven. 737 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:34:04,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:34:05,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098663638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:05,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567688075] [2022-11-22 02:34:05,778 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 02:34:05,778 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:34:05,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:34:05,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:34:05,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:34:06,070 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-22 02:34:06,081 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-22 02:34:06,242 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:34:08,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7972#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 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 [2022-11-22 02:34:08,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:34:08,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:34:08,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2022-11-22 02:34:08,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435795475] [2022-11-22 02:34:08,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:34:08,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-22 02:34:08,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-22 02:34:08,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2196, Invalid=5994, Unknown=0, NotChecked=0, Total=8190 [2022-11-22 02:34:08,195 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 74 states, 74 states have (on average 3.2837837837837838) internal successors, (243), 74 states have internal predecessors, (243), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:09,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:09,934 INFO L93 Difference]: Finished difference Result 639 states and 932 transitions. [2022-11-22 02:34:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-22 02:34:09,935 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.2837837837837838) internal successors, (243), 74 states have internal predecessors, (243), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 105 [2022-11-22 02:34:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:09,940 INFO L225 Difference]: With dead ends: 639 [2022-11-22 02:34:09,940 INFO L226 Difference]: Without dead ends: 594 [2022-11-22 02:34:09,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5269 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4026, Invalid=9314, Unknown=0, NotChecked=0, Total=13340 [2022-11-22 02:34:09,946 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 672 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:09,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 345 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:34:09,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-22 02:34:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 195. [2022-11-22 02:34:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 184 states have (on average 1.2065217391304348) internal successors, (222), 183 states have internal predecessors, (222), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-22 02:34:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2022-11-22 02:34:10,030 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 105 [2022-11-22 02:34:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:10,031 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2022-11-22 02:34:10,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.2837837837837838) internal successors, (243), 74 states have internal predecessors, (243), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2022-11-22 02:34:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-22 02:34:10,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:10,033 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 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] [2022-11-22 02:34:10,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:10,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:34:10,239 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:10,239 INFO L85 PathProgramCache]: Analyzing trace with hash -425813032, now seen corresponding path program 4 times [2022-11-22 02:34:10,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:10,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926220555] [2022-11-22 02:34:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:10,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:34:10,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 02:34:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:34:10,475 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 02:34:10,475 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 02:34:10,476 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-22 02:34:10,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:34:10,483 INFO L444 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1, 1] [2022-11-22 02:34:10,487 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 02:34:10,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:34:10 BoogieIcfgContainer [2022-11-22 02:34:10,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 02:34:10,585 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 02:34:10,585 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 02:34:10,585 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 02:34:10,586 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:32:15" (3/4) ... [2022-11-22 02:34:10,589 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-22 02:34:10,589 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 02:34:10,589 INFO L158 Benchmark]: Toolchain (without parser) took 116876.23ms. Allocated memory was 163.6MB in the beginning and 343.9MB in the end (delta: 180.4MB). Free memory was 119.4MB in the beginning and 207.8MB in the end (delta: -88.4MB). Peak memory consumption was 93.9MB. Max. memory is 16.1GB. [2022-11-22 02:34:10,590 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 125.8MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:34:10,590 INFO L158 Benchmark]: CACSL2BoogieTranslator took 333.18ms. Allocated memory is still 163.6MB. Free memory was 119.4MB in the beginning and 106.0MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-22 02:34:10,591 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.42ms. Allocated memory is still 163.6MB. Free memory was 106.0MB in the beginning and 103.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:34:10,592 INFO L158 Benchmark]: Boogie Preprocessor took 48.60ms. Allocated memory is still 163.6MB. Free memory was 103.9MB in the beginning and 101.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:34:10,592 INFO L158 Benchmark]: RCFGBuilder took 1058.41ms. Allocated memory is still 163.6MB. Free memory was 101.8MB in the beginning and 115.6MB in the end (delta: -13.8MB). Peak memory consumption was 33.1MB. Max. memory is 16.1GB. [2022-11-22 02:34:10,593 INFO L158 Benchmark]: TraceAbstraction took 115381.44ms. Allocated memory was 163.6MB in the beginning and 343.9MB in the end (delta: 180.4MB). Free memory was 115.4MB in the beginning and 207.8MB in the end (delta: -92.4MB). Peak memory consumption was 88.0MB. Max. memory is 16.1GB. [2022-11-22 02:34:10,593 INFO L158 Benchmark]: Witness Printer took 4.10ms. Allocated memory is still 343.9MB. Free memory is still 207.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:34:10,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 125.8MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 333.18ms. Allocated memory is still 163.6MB. Free memory was 119.4MB in the beginning and 106.0MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.42ms. Allocated memory is still 163.6MB. Free memory was 106.0MB in the beginning and 103.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.60ms. Allocated memory is still 163.6MB. Free memory was 103.9MB in the beginning and 101.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1058.41ms. Allocated memory is still 163.6MB. Free memory was 101.8MB in the beginning and 115.6MB in the end (delta: -13.8MB). Peak memory consumption was 33.1MB. Max. memory is 16.1GB. * TraceAbstraction took 115381.44ms. Allocated memory was 163.6MB in the beginning and 343.9MB in the end (delta: 180.4MB). Free memory was 115.4MB in the beginning and 207.8MB in the end (delta: -92.4MB). Peak memory consumption was 88.0MB. Max. memory is 16.1GB. * Witness Printer took 4.10ms. Allocated memory is still 343.9MB. Free memory is still 207.8MB. There was no memory consumed. 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: 17]: 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 77, overapproximation of bitwiseAnd at line 76, overapproximation of bitwiseComplement at line 76. Possible FailurePath: [L221] unsigned int a ; [L222] unsigned int ma = __VERIFIER_nondet_uint(); [L223] signed char ea = __VERIFIER_nondet_char(); [L224] unsigned int b ; [L225] unsigned int mb = __VERIFIER_nondet_uint(); [L226] signed char eb = __VERIFIER_nondet_char(); [L227] unsigned int r_mul ; [L228] unsigned int zero ; [L229] unsigned int one ; [L230] int sb ; [L231] int tmp ; [L232] int tmp___0 ; [L233] int tmp___1 ; [L234] int __retres16 ; VAL [ea=127, eb=0] [L238] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L238] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=0] [L238] zero = base2flt(0, 0) [L239] CALL, EXPR base2flt(1, 0) VAL [\old(e)=0, \old(m)=1] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L35] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-24, m=16777216] [L47] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=1, e=-24, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=1, __retres4=0, e=-24, m=2550136832, res=0] [L80] return (__retres4); [L239] RET, EXPR base2flt(1, 0) VAL [base2flt(1, 0)=4294967296, ea=127, eb=0, zero=0] [L239] one = base2flt(1, 0) [L240] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=127, \old(m)=16777216, __retres4=4294967295, e=127, m=16777216, res=4294967295] [L80] return (__retres4); [L240] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=8589934591, ea=127, eb=0, ma=16777216, one=0, zero=0] [L240] a = base2flt(ma, ea) [L241] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L241] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=0, ea=127, eb=0, ma=16777216, mb=0, one=0, zero=0] [L241] b = base2flt(mb, eb) [L242] CALL, EXPR mulflt(a, b) [L148] unsigned int res ; [L149] unsigned int ma ; [L150] unsigned int mb ; [L151] unsigned long long accu ; [L152] int ea ; [L153] int eb ; [L154] unsigned int tmp ; [L155] unsigned int __retres10 ; [L158] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=0, a=4294967295, b=0, tmp=0] [L165] COND TRUE ! b [L166] __retres10 = 0U VAL [\old(a)=4294967295, \old(b)=0, __retres10=0, a=4294967295, b=0, tmp=0] [L217] return (__retres10); [L242] RET, EXPR mulflt(a, b) [L242] r_mul = mulflt(a, b) [L244] COND FALSE !(b < one) [L247] COND FALSE !(b > one) [L250] tmp = 0 [L252] sb = tmp VAL [a=4294967295, b=0, ea=127, eb=0, ma=16777216, mb=0, one=0, r_mul=0, sb=0, tmp=0, zero=0] [L254] COND TRUE sb == 0 [L255] COND TRUE r_mul < a [L256] tmp___1 = -1 VAL [a=4294967295, b=0, ea=127, eb=0, ma=16777216, mb=0, one=0, r_mul=0, sb=0, tmp=0, tmp___0=0, tmp___1=-1, zero=0] [L266] CALL __VERIFIER_assert(tmp___1 == 0) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 115.2s, OverallIterations: 12, TraceHistogramMax: 24, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 77.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2244 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2221 mSDsluCounter, 3758 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3334 mSDsCounter, 625 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5718 IncrementalHoareTripleChecker+Invalid, 6343 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 625 mSolverCounterUnsat, 424 mSDtfsCounter, 5718 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2015 GetRequests, 1467 SyntacticMatches, 0 SemanticMatches, 548 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12906 ImplicationChecksByTransitivity, 91.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=11, InterpolantAutomatonStates: 284, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 1104 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 1302 NumberOfCodeBlocks, 1302 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1755 ConstructedInterpolants, 0 QuantifiedInterpolants, 7060 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1990 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 33 InterpolantComputations, 1 PerfectInterpolantSequences, 659/4560 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: OVERALL_TIME: 0.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 33, DAG_INTERPRETER_EARLY_EXITS: 3, TOOLS_POST_APPLICATIONS: 47, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 18, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 12, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 77, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 113, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 17, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 33, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 0.1s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 12, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 527, DAG_COMPRESSION_RETAINED_NODES: 116, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-22 02:34:10,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- 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-b5237d8 [2022-11-22 02:34:13,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:34:13,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:34:13,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:34:13,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:34:13,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:34:13,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:34:13,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:34:13,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:34:13,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:34:13,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:34:13,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:34:13,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:34:13,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:34:13,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:34:13,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:34:13,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:34:13,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:34:13,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:34:13,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:34:13,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:34:13,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:34:13,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:34:13,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:34:13,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:34:13,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:34:13,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:34:13,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:34:13,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:34:13,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:34:13,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:34:13,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:34:13,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:34:13,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:34:13,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:34:13,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:34:13,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:34:13,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:34:13,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:34:13,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:34:13,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:34:13,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-22 02:34:13,174 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:34:13,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:34:13,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:34:13,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:34:13,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:34:13,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:34:13,179 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:34:13,179 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:34:13,179 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:34:13,179 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:34:13,180 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:34:13,181 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:34:13,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:34:13,182 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:34:13,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:34:13,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:34:13,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:34:13,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:34:13,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:34:13,183 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:34:13,183 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 02:34:13,184 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 02:34:13,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:34:13,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:34:13,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:34:13,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:34:13,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:34:13,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 02:34:13,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:34:13,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:34:13,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:34:13,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:34:13,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:34:13,187 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 02:34:13,187 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:13,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:34:13,188 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:34:13,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 02:34:13,188 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_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2022-11-22 02:34:13,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:34:13,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:34:13,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:34:13,570 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:34:13,571 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:34:13,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-22 02:34:16,727 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:34:17,031 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:34:17,037 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-22 02:34:17,053 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/data/28ebe3965/98c3add6db88424182a494c50e43b045/FLAG76093eb3a [2022-11-22 02:34:17,079 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/data/28ebe3965/98c3add6db88424182a494c50e43b045 [2022-11-22 02:34:17,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:34:17,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:34:17,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:34:17,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:34:17,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:34:17,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115194dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17, skipping insertion in model container [2022-11-22 02:34:17,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:34:17,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:34:17,338 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_ef8d8c87-92ff-4740-b3bb-8069344851e9/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-22 02:34:17,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:34:17,397 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:34:17,410 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_ef8d8c87-92ff-4740-b3bb-8069344851e9/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-22 02:34:17,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:34:17,450 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:34:17,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17 WrapperNode [2022-11-22 02:34:17,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:34:17,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:34:17,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:34:17,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:34:17,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,511 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2022-11-22 02:34:17,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:34:17,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:34:17,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:34:17,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:34:17,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,574 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:34:17,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:34:17,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:34:17,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:34:17,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (1/1) ... [2022-11-22 02:34:17,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:34:17,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:17,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:34:17,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:34:17,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:34:17,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 02:34:17,682 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-22 02:34:17,682 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-22 02:34:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:34:17,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:34:17,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 02:34:17,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 02:34:17,804 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:34:17,806 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:34:18,153 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:34:18,165 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:34:18,165 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:34:18,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:34:18 BoogieIcfgContainer [2022-11-22 02:34:18,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:34:18,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:34:18,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:34:18,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:34:18,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:34:17" (1/3) ... [2022-11-22 02:34:18,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1697c867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:34:18, skipping insertion in model container [2022-11-22 02:34:18,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:17" (2/3) ... [2022-11-22 02:34:18,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1697c867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:34:18, skipping insertion in model container [2022-11-22 02:34:18,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:34:18" (3/3) ... [2022-11-22 02:34:18,177 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2022-11-22 02:34:18,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:34:18,197 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:34:18,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:34:18,286 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;@63b9b182, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:34:18,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:34:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:34:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:34:18,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:18,307 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:18,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1696138713, now seen corresponding path program 1 times [2022-11-22 02:34:18,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:18,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546998513] [2022-11-22 02:34:18,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:18,336 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 [2022-11-22 02:34:18,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:18,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:18,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:18,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:34:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:18,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:18,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:18,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546998513] [2022-11-22 02:34:18,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546998513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:18,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:18,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:34:18,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523764816] [2022-11-22 02:34:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:18,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:34:18,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:34:18,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:34:18,708 INFO L87 Difference]: Start difference. First operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:34:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:18,871 INFO L93 Difference]: Finished difference Result 113 states and 179 transitions. [2022-11-22 02:34:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:34:18,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-11-22 02:34:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:18,887 INFO L225 Difference]: With dead ends: 113 [2022-11-22 02:34:18,887 INFO L226 Difference]: Without dead ends: 59 [2022-11-22 02:34:18,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:18,904 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:18,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-22 02:34:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-11-22 02:34:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 02:34:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2022-11-22 02:34:18,950 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 41 [2022-11-22 02:34:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:18,950 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2022-11-22 02:34:18,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:34:18,951 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2022-11-22 02:34:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:34:18,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:18,954 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:18,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:19,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:19,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1421820539, now seen corresponding path program 1 times [2022-11-22 02:34:19,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:19,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930042633] [2022-11-22 02:34:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:19,171 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 [2022-11-22 02:34:19,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:19,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:19,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:19,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:34:19,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:19,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:19,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:19,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930042633] [2022-11-22 02:34:19,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930042633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:19,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:19,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:34:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379525432] [2022-11-22 02:34:19,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:34:19,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:34:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:34:19,366 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:34:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:19,463 INFO L93 Difference]: Finished difference Result 105 states and 150 transitions. [2022-11-22 02:34:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:34:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-11-22 02:34:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:19,466 INFO L225 Difference]: With dead ends: 105 [2022-11-22 02:34:19,470 INFO L226 Difference]: Without dead ends: 62 [2022-11-22 02:34:19,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:19,473 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:19,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 154 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:19,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-22 02:34:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-11-22 02:34:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:34:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2022-11-22 02:34:19,492 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 44 [2022-11-22 02:34:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:19,493 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2022-11-22 02:34:19,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:34:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2022-11-22 02:34:19,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:34:19,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:19,495 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:19,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:19,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:19,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash -865634876, now seen corresponding path program 1 times [2022-11-22 02:34:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:19,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945954281] [2022-11-22 02:34:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:19,701 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 [2022-11-22 02:34:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:19,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:19,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Waiting until timeout for monitored process [2022-11-22 02:34:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:34:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:19,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:19,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:19,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945954281] [2022-11-22 02:34:19,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945954281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:19,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:19,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:34:19,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592442717] [2022-11-22 02:34:19,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:19,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:34:19,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:34:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:34:19,834 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:34:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:19,994 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2022-11-22 02:34:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:34:19,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-11-22 02:34:19,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:19,997 INFO L225 Difference]: With dead ends: 114 [2022-11-22 02:34:19,997 INFO L226 Difference]: Without dead ends: 66 [2022-11-22 02:34:19,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:19,999 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 147 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 [2022-11-22 02:34:19,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 147 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-22 02:34:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-22 02:34:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:34:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-11-22 02:34:20,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2022-11-22 02:34:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:20,011 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-11-22 02:34:20,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:34:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-11-22 02:34:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:34:20,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:20,013 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:20,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:20,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:20,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash 155611130, now seen corresponding path program 1 times [2022-11-22 02:34:20,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:20,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942710905] [2022-11-22 02:34:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:20,227 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 [2022-11-22 02:34:20,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:20,228 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:20,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (5)] Waiting until timeout for monitored process [2022-11-22 02:34:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:20,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:34:20,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:20,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:20,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:20,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942710905] [2022-11-22 02:34:20,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942710905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:20,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:20,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:34:20,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578867290] [2022-11-22 02:34:20,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:20,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:34:20,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:20,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:34:20,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:20,391 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:34:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:20,603 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-11-22 02:34:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:34:20,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-11-22 02:34:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:20,606 INFO L225 Difference]: With dead ends: 122 [2022-11-22 02:34:20,606 INFO L226 Difference]: Without dead ends: 73 [2022-11-22 02:34:20,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:34:20,608 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:20,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 194 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:34:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-22 02:34:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2022-11-22 02:34:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 49 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:34:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2022-11-22 02:34:20,632 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 46 [2022-11-22 02:34:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:20,633 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2022-11-22 02:34:20,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:34:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2022-11-22 02:34:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:34:20,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:20,641 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-11-22 02:34:20,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:20,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:20,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:20,854 INFO L85 PathProgramCache]: Analyzing trace with hash 709732423, now seen corresponding path program 1 times [2022-11-22 02:34:20,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:20,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888501960] [2022-11-22 02:34:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:20,855 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 [2022-11-22 02:34:20,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:20,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:20,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:20,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:34:20,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:21,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:21,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:21,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888501960] [2022-11-22 02:34:21,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888501960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:21,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [740889989] [2022-11-22 02:34:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:21,245 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:21,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:21,254 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:21,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-22 02:34:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:21,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:34:21,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:34:21,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:21,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [740889989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:21,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:34:21,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-22 02:34:21,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276947984] [2022-11-22 02:34:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:21,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:34:21,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:34:21,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:34:21,367 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:21,378 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-11-22 02:34:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:34:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-11-22 02:34:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:21,380 INFO L225 Difference]: With dead ends: 66 [2022-11-22 02:34:21,380 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 02:34:21,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:34:21,382 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:21,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 02:34:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-22 02:34:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:34:21,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-22 02:34:21,395 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 47 [2022-11-22 02:34:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:21,395 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-22 02:34:21,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-22 02:34:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:34:21,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:21,397 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:21,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:21,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:21,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:21,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash -37920403, now seen corresponding path program 1 times [2022-11-22 02:34:21,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:21,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744638518] [2022-11-22 02:34:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:21,805 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 [2022-11-22 02:34:21,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:21,806 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:21,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:21,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:34:21,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:21,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:22,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:22,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744638518] [2022-11-22 02:34:22,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744638518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:22,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463312566] [2022-11-22 02:34:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:22,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:22,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:22,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:22,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-22 02:34:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:22,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:34:22,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:34:22,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:22,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [463312566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:22,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:34:22,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-22 02:34:22,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684795270] [2022-11-22 02:34:22,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:22,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:34:22,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:34:22,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:34:22,352 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:22,384 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-11-22 02:34:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:34:22,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-22 02:34:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:22,386 INFO L225 Difference]: With dead ends: 67 [2022-11-22 02:34:22,386 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 02:34:22,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:34:22,387 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:22,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 181 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 02:34:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-22 02:34:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:34:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-11-22 02:34:22,395 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 49 [2022-11-22 02:34:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:22,396 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-11-22 02:34:22,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-11-22 02:34:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:34:22,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:22,397 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:22,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:22,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:22,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:22,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:22,811 INFO L85 PathProgramCache]: Analyzing trace with hash -847267029, now seen corresponding path program 1 times [2022-11-22 02:34:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:22,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879404220] [2022-11-22 02:34:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:22,816 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 [2022-11-22 02:34:22,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:22,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:22,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:34:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:22,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:23,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:23,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879404220] [2022-11-22 02:34:23,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879404220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:23,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [513142061] [2022-11-22 02:34:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:23,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:23,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:23,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:23,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-22 02:34:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:23,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:34:23,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:34:23,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:23,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [513142061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:23,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:34:23,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-22 02:34:23,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617281807] [2022-11-22 02:34:23,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:23,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:34:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:34:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:34:23,349 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:23,442 INFO L93 Difference]: Finished difference Result 97 states and 132 transitions. [2022-11-22 02:34:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:34:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-22 02:34:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:23,444 INFO L225 Difference]: With dead ends: 97 [2022-11-22 02:34:23,444 INFO L226 Difference]: Without dead ends: 76 [2022-11-22 02:34:23,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:34:23,445 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 15 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:23,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 278 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-22 02:34:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2022-11-22 02:34:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.309090909090909) internal successors, (72), 57 states have internal predecessors, (72), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 02:34:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2022-11-22 02:34:23,466 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 49 [2022-11-22 02:34:23,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:23,467 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2022-11-22 02:34:23,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2022-11-22 02:34:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:34:23,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:23,475 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:23,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:23,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:23,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1434073043, now seen corresponding path program 1 times [2022-11-22 02:34:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:23,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437309350] [2022-11-22 02:34:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:23,887 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 [2022-11-22 02:34:23,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:23,888 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:23,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (12)] Waiting until timeout for monitored process [2022-11-22 02:34:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:23,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:34:23,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:24,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:24,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:24,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437309350] [2022-11-22 02:34:24,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437309350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:24,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1164360645] [2022-11-22 02:34:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:24,197 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:24,199 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:24,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-22 02:34:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:24,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:34:24,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:34:24,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:34:24,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1164360645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:24,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940392173] [2022-11-22 02:34:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:24,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:24,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:24,483 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:24,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:34:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:24,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:34:24,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:24,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940392173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:24,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:34:24,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 12 [2022-11-22 02:34:24,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419316390] [2022-11-22 02:34:24,706 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:34:24,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:34:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:34:24,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:34:24,708 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:34:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:25,368 INFO L93 Difference]: Finished difference Result 185 states and 269 transitions. [2022-11-22 02:34:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:34:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 49 [2022-11-22 02:34:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:25,371 INFO L225 Difference]: With dead ends: 185 [2022-11-22 02:34:25,371 INFO L226 Difference]: Without dead ends: 126 [2022-11-22 02:34:25,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:34:25,372 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 79 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:25,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 399 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:34:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-22 02:34:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2022-11-22 02:34:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.3493975903614457) internal successors, (112), 83 states have internal predecessors, (112), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-22 02:34:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-11-22 02:34:25,392 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 49 [2022-11-22 02:34:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:25,392 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-11-22 02:34:25,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:34:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-11-22 02:34:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 02:34:25,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:25,394 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-11-22 02:34:25,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-11-22 02:34:25,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:25,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:25,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:25,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash -500635246, now seen corresponding path program 1 times [2022-11-22 02:34:25,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:25,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624249903] [2022-11-22 02:34:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:25,998 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 [2022-11-22 02:34:25,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:25,999 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:26,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (15)] Waiting until timeout for monitored process [2022-11-22 02:34:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:26,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:34:26,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:26,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:26,281 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624249903] [2022-11-22 02:34:26,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624249903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051711865] [2022-11-22 02:34:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:26,281 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:26,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:26,283 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:26,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-22 02:34:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:26,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:34:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:34:26,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:26,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2051711865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:26,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:34:26,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-22 02:34:26,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789130886] [2022-11-22 02:34:26,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:26,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:34:26,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:26,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:34:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:34:26,457 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:26,541 INFO L93 Difference]: Finished difference Result 118 states and 160 transitions. [2022-11-22 02:34:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:34:26,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-11-22 02:34:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:26,543 INFO L225 Difference]: With dead ends: 118 [2022-11-22 02:34:26,543 INFO L226 Difference]: Without dead ends: 112 [2022-11-22 02:34:26,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:34:26,544 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:26,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 225 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:26,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-22 02:34:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2022-11-22 02:34:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 98 states have internal predecessors, (128), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-22 02:34:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 152 transitions. [2022-11-22 02:34:26,569 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 152 transitions. Word has length 53 [2022-11-22 02:34:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:26,569 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 152 transitions. [2022-11-22 02:34:26,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 152 transitions. [2022-11-22 02:34:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 02:34:26,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:26,571 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-11-22 02:34:26,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:26,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:26,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:26,973 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash -443376944, now seen corresponding path program 1 times [2022-11-22 02:34:26,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:26,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988194322] [2022-11-22 02:34:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:26,975 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 [2022-11-22 02:34:26,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:26,976 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:26,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:27,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:34:27,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:27,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:27,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:27,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988194322] [2022-11-22 02:34:27,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988194322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:27,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1029820293] [2022-11-22 02:34:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:27,249 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:27,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:27,251 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:27,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-22 02:34:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:27,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:34:27,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:27,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:27,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1029820293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:27,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902273381] [2022-11-22 02:34:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:27,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:27,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:27,507 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:27,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 02:34:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:27,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:34:27,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 02:34:27,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:34:27,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902273381] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:27,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-22 02:34:27,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2022-11-22 02:34:27,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811581112] [2022-11-22 02:34:27,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:27,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:34:27,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:27,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:34:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:34:27,788 INFO L87 Difference]: Start difference. First operand 110 states and 152 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:27,861 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-11-22 02:34:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:34:27,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-11-22 02:34:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:27,863 INFO L225 Difference]: With dead ends: 116 [2022-11-22 02:34:27,863 INFO L226 Difference]: Without dead ends: 99 [2022-11-22 02:34:27,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:34:27,864 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:27,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 290 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-22 02:34:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-22 02:34:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:34:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2022-11-22 02:34:27,886 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 53 [2022-11-22 02:34:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:27,886 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2022-11-22 02:34:27,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:34:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2022-11-22 02:34:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 02:34:27,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:27,890 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-22 02:34:27,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:28,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:28,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:28,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:28,497 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2015352415, now seen corresponding path program 1 times [2022-11-22 02:34:28,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:28,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977293734] [2022-11-22 02:34:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:28,498 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 [2022-11-22 02:34:28,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:28,499 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:28,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (20)] Waiting until timeout for monitored process [2022-11-22 02:34:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:28,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:34:28,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:28,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:28,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:28,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977293734] [2022-11-22 02:34:28,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977293734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:28,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [487339391] [2022-11-22 02:34:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:28,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:28,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:28,790 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:28,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-22 02:34:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:28,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:34:28,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:28,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:29,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [487339391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:29,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577881230] [2022-11-22 02:34:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:29,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:29,047 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:29,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 02:34:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:34:29,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:29,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:29,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577881230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:29,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:34:29,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 15 [2022-11-22 02:34:29,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532935965] [2022-11-22 02:34:29,399 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:34:29,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:34:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:34:29,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:34:29,401 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:29,809 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2022-11-22 02:34:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:34:29,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2022-11-22 02:34:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:29,812 INFO L225 Difference]: With dead ends: 223 [2022-11-22 02:34:29,812 INFO L226 Difference]: Without dead ends: 131 [2022-11-22 02:34:29,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:34:29,814 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 136 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:29,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 306 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:34:29,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-22 02:34:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2022-11-22 02:34:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 92 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:34:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2022-11-22 02:34:29,828 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 55 [2022-11-22 02:34:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:29,828 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2022-11-22 02:34:29,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2022-11-22 02:34:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 02:34:29,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:29,830 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-11-22 02:34:29,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:30,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:30,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:30,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:30,441 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:30,442 INFO L85 PathProgramCache]: Analyzing trace with hash 173315734, now seen corresponding path program 1 times [2022-11-22 02:34:30,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:30,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621715533] [2022-11-22 02:34:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:30,442 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 [2022-11-22 02:34:30,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:30,446 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:30,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (23)] Waiting until timeout for monitored process [2022-11-22 02:34:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:30,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:34:30,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:30,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:31,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:31,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621715533] [2022-11-22 02:34:31,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621715533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:31,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1068182127] [2022-11-22 02:34:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:31,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:31,111 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:31,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-22 02:34:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:31,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:34:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:31,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:31,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1068182127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:31,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594879862] [2022-11-22 02:34:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:31,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:31,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:31,513 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:31,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 02:34:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:31,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:34:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:31,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:32,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594879862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:32,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:34:32,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-22 02:34:32,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678529253] [2022-11-22 02:34:32,442 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:34:32,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:34:32,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:32,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:34:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:34:32,444 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:34,008 INFO L93 Difference]: Finished difference Result 270 states and 385 transitions. [2022-11-22 02:34:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:34:34,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-22 02:34:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:34,011 INFO L225 Difference]: With dead ends: 270 [2022-11-22 02:34:34,011 INFO L226 Difference]: Without dead ends: 174 [2022-11-22 02:34:34,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:34:34,013 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 311 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:34,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 526 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:34:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-22 02:34:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 117. [2022-11-22 02:34:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.361904761904762) internal successors, (143), 106 states have internal predecessors, (143), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:34:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2022-11-22 02:34:34,040 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 62 [2022-11-22 02:34:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:34,041 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2022-11-22 02:34:34,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2022-11-22 02:34:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 02:34:34,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:34,043 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 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] [2022-11-22 02:34:34,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (23)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:34,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:34,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-22 02:34:34,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:34,654 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash 103329953, now seen corresponding path program 2 times [2022-11-22 02:34:34,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:34,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735328613] [2022-11-22 02:34:34,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:34:34,655 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 [2022-11-22 02:34:34,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:34,656 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:34,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:34,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:34:34,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:34:34,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:34:34,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:34,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:35,299 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:35,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735328613] [2022-11-22 02:34:35,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735328613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:35,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1892051417] [2022-11-22 02:34:35,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:34:35,300 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:35,303 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:35,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-22 02:34:35,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:34:35,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:34:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:34:35,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:35,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:35,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1892051417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114002527] [2022-11-22 02:34:35,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:34:35,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:35,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:35,699 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:35,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-22 02:34:35,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:34:35,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:34:35,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:34:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:35,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:36,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114002527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:36,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:34:36,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 27 [2022-11-22 02:34:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800905867] [2022-11-22 02:34:36,477 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:34:36,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 02:34:36,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:36,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 02:34:36,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:34:36,481 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:37,643 INFO L93 Difference]: Finished difference Result 293 states and 416 transitions. [2022-11-22 02:34:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 02:34:37,644 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-22 02:34:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:37,646 INFO L225 Difference]: With dead ends: 293 [2022-11-22 02:34:37,646 INFO L226 Difference]: Without dead ends: 183 [2022-11-22 02:34:37,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=581, Invalid=1059, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 02:34:37,648 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 389 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:37,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 631 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:34:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-22 02:34:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2022-11-22 02:34:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.391304347826087) internal successors, (160), 116 states have internal predecessors, (160), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:34:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 181 transitions. [2022-11-22 02:34:37,673 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 181 transitions. Word has length 67 [2022-11-22 02:34:37,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:37,674 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 181 transitions. [2022-11-22 02:34:37,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 181 transitions. [2022-11-22 02:34:37,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 02:34:37,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:37,679 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 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] [2022-11-22 02:34:37,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:37,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-22 02:34:38,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-22 02:34:38,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:38,291 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1524110314, now seen corresponding path program 2 times [2022-11-22 02:34:38,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:38,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855298229] [2022-11-22 02:34:38,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:34:38,292 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 [2022-11-22 02:34:38,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:38,293 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:38,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (29)] Waiting until timeout for monitored process [2022-11-22 02:34:38,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:34:38,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:34:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:34:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:38,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:40,113 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855298229] [2022-11-22 02:34:40,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855298229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792154261] [2022-11-22 02:34:40,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:34:40,113 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:40,115 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:40,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-22 02:34:40,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:34:40,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:34:40,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:34:40,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:40,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:40,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [792154261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:40,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366207051] [2022-11-22 02:34:40,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:34:40,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:40,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:40,811 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:40,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-22 02:34:40,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:34:40,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:34:40,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:34:40,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:41,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:34:43,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366207051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:43,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:34:43,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2022-11-22 02:34:43,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600186841] [2022-11-22 02:34:43,313 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:34:43,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 02:34:43,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 02:34:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:34:43,315 INFO L87 Difference]: Start difference. First operand 127 states and 181 transitions. Second operand has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:50,008 INFO L93 Difference]: Finished difference Result 396 states and 585 transitions. [2022-11-22 02:34:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-22 02:34:50,009 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-11-22 02:34:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:50,012 INFO L225 Difference]: With dead ends: 396 [2022-11-22 02:34:50,012 INFO L226 Difference]: Without dead ends: 276 [2022-11-22 02:34:50,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1210, Invalid=2330, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 02:34:50,014 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 747 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:50,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1767 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 02:34:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-22 02:34:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 153. [2022-11-22 02:34:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.4397163120567376) internal successors, (203), 142 states have internal predecessors, (203), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:34:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 224 transitions. [2022-11-22 02:34:50,039 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 224 transitions. Word has length 80 [2022-11-22 02:34:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:50,039 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 224 transitions. [2022-11-22 02:34:50,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:34:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 224 transitions. [2022-11-22 02:34:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 02:34:50,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:50,041 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 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] [2022-11-22 02:34:50,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:50,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-22 02:34:50,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (29)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:50,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:34:50,644 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:50,644 INFO L85 PathProgramCache]: Analyzing trace with hash 264388257, now seen corresponding path program 3 times [2022-11-22 02:34:50,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:50,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334314099] [2022-11-22 02:34:50,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:34:50,645 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 [2022-11-22 02:34:50,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:50,646 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:50,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Waiting until timeout for monitored process [2022-11-22 02:34:50,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-22 02:34:50,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:34:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:34:50,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:34:52,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:34:55,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:55,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334314099] [2022-11-22 02:34:55,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334314099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:34:55,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2121991717] [2022-11-22 02:34:55,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:34:55,534 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:55,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:55,539 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:55,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-22 02:34:55,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-22 02:34:55,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:34:55,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:34:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:35:08,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:35:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:35:10,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2121991717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:35:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35752796] [2022-11-22 02:35:10,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:35:10,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:10,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:10,095 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:35:10,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-22 02:35:10,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-22 02:35:10,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:35:10,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:35:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:35:12,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:35:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:35:15,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35752796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:35:15,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:35:15,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25, 25, 19, 19] total 90 [2022-11-22 02:35:15,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499531960] [2022-11-22 02:35:15,773 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:35:15,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-22 02:35:15,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:35:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-22 02:35:15,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=7224, Unknown=6, NotChecked=0, Total=8010 [2022-11-22 02:35:15,777 INFO L87 Difference]: Start difference. First operand 153 states and 224 transitions. Second operand has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-22 02:35:59,808 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] [2022-11-22 02:37:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:35,987 INFO L93 Difference]: Finished difference Result 743 states and 1376 transitions. [2022-11-22 02:37:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-11-22 02:37:35,989 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-22 02:37:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:35,995 INFO L225 Difference]: With dead ends: 743 [2022-11-22 02:37:35,996 INFO L226 Difference]: Without dead ends: 591 [2022-11-22 02:37:36,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 466 SyntacticMatches, 3 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39712 ImplicationChecksByTransitivity, 137.3s TimeCoverageRelationStatistics Valid=16673, Invalid=97219, Unknown=14, NotChecked=0, Total=113906 [2022-11-22 02:37:36,020 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 5295 mSDsluCounter, 5057 mSDsCounter, 0 mSdLazyCounter, 11748 mSolverCounterSat, 639 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5346 SdHoareTripleChecker+Valid, 5173 SdHoareTripleChecker+Invalid, 12388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 11748 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:36,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5346 Valid, 5173 Invalid, 12388 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [639 Valid, 11748 Invalid, 1 Unknown, 0 Unchecked, 23.3s Time] [2022-11-22 02:37:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-11-22 02:37:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 183. [2022-11-22 02:37:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 168 states have (on average 1.4583333333333333) internal successors, (245), 170 states have internal predecessors, (245), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2022-11-22 02:37:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 281 transitions. [2022-11-22 02:37:36,137 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 281 transitions. Word has length 91 [2022-11-22 02:37:36,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:36,137 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 281 transitions. [2022-11-22 02:37:36,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-22 02:37:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 281 transitions. [2022-11-22 02:37:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 02:37:36,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:36,140 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 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] [2022-11-22 02:37:36,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:36,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-22 02:37:36,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:36,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:37:36,746 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash 861370134, now seen corresponding path program 3 times [2022-11-22 02:37:36,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:37:36,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150799601] [2022-11-22 02:37:36,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:37:36,747 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 [2022-11-22 02:37:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:37:36,748 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:37:36,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Waiting until timeout for monitored process [2022-11-22 02:37:36,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-22 02:37:36,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:37:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 02:37:36,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:37:38,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:37:45,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:37:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150799601] [2022-11-22 02:37:45,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150799601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1414149068] [2022-11-22 02:37:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:37:45,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:37:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:37:45,314 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:37:45,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-22 02:37:45,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-22 02:37:45,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:37:45,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:37:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:37:46,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:37:47,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1414149068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:47,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828320597] [2022-11-22 02:37:47,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:37:47,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:47,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:47,900 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:47,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-22 02:37:48,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-22 02:37:48,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:37:48,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:37:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:37:48,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:37:49,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828320597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:49,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:37:49,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 54 [2022-11-22 02:37:49,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187186167] [2022-11-22 02:37:49,966 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:37:49,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-22 02:37:49,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:37:49,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-22 02:37:49,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=2085, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:37:49,969 INFO L87 Difference]: Start difference. First operand 183 states and 281 transitions. Second operand has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:38:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:24,802 INFO L93 Difference]: Finished difference Result 656 states and 1118 transitions. [2022-11-22 02:38:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-22 02:38:24,804 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-11-22 02:38:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:24,808 INFO L225 Difference]: With dead ends: 656 [2022-11-22 02:38:24,808 INFO L226 Difference]: Without dead ends: 484 [2022-11-22 02:38:24,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 683 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=3174, Invalid=6726, Unknown=0, NotChecked=0, Total=9900 [2022-11-22 02:38:24,812 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2249 mSDsluCounter, 5095 mSDsCounter, 0 mSdLazyCounter, 4386 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2249 SdHoareTripleChecker+Valid, 5301 SdHoareTripleChecker+Invalid, 4753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 4386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:24,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2249 Valid, 5301 Invalid, 4753 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [367 Valid, 4386 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2022-11-22 02:38:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-22 02:38:24,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 233. [2022-11-22 02:38:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 218 states have (on average 1.5045871559633028) internal successors, (328), 220 states have internal predecessors, (328), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2022-11-22 02:38:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 364 transitions. [2022-11-22 02:38:24,885 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 364 transitions. Word has length 116 [2022-11-22 02:38:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:24,886 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 364 transitions. [2022-11-22 02:38:24,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:38:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 364 transitions. [2022-11-22 02:38:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-22 02:38:24,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:24,888 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:24,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:25,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Ended with exit code 0 [2022-11-22 02:38:25,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-22 02:38:25,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:25,492 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:25,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1103110160, now seen corresponding path program 1 times [2022-11-22 02:38:25,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:25,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611406768] [2022-11-22 02:38:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:25,493 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 [2022-11-22 02:38:25,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:25,493 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:38:25,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (38)] Waiting until timeout for monitored process [2022-11-22 02:38:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:38:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-22 02:38:25,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-22 02:38:25,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611406768] [2022-11-22 02:38:25,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611406768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1897237607] [2022-11-22 02:38:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:25,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:25,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:25,711 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-22 02:38:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:38:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-22 02:38:25,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-22 02:38:25,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1897237607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:25,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151169238] [2022-11-22 02:38:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:25,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:25,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:38:25,899 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:38:25,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-22 02:38:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:38:26,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-22 02:38:26,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-22 02:38:26,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151169238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:26,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:38:26,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 8 [2022-11-22 02:38:26,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496508497] [2022-11-22 02:38:26,122 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:38:26,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:38:26,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:38:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:38:26,124 INFO L87 Difference]: Start difference. First operand 233 states and 364 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:26,291 INFO L93 Difference]: Finished difference Result 249 states and 379 transitions. [2022-11-22 02:38:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:38:26,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-11-22 02:38:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:26,294 INFO L225 Difference]: With dead ends: 249 [2022-11-22 02:38:26,295 INFO L226 Difference]: Without dead ends: 223 [2022-11-22 02:38:26,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:38:26,296 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:26,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 390 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:38:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-22 02:38:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 215. [2022-11-22 02:38:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 201 states have (on average 1.5223880597014925) internal successors, (306), 204 states have internal predecessors, (306), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-22 02:38:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 332 transitions. [2022-11-22 02:38:26,350 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 332 transitions. Word has length 124 [2022-11-22 02:38:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:26,351 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 332 transitions. [2022-11-22 02:38:26,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 332 transitions. [2022-11-22 02:38:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 02:38:26,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:26,354 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:26,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:26,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (38)] Ended with exit code 0 [2022-11-22 02:38:26,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-22 02:38:26,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:26,961 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1474812810, now seen corresponding path program 1 times [2022-11-22 02:38:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:26,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101461368] [2022-11-22 02:38:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:26,963 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 [2022-11-22 02:38:26,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:26,964 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:38:26,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (41)] Waiting until timeout for monitored process [2022-11-22 02:38:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:27,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:38:27,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2022-11-22 02:38:27,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:27,113 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:27,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101461368] [2022-11-22 02:38:27,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101461368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:27,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:38:27,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:38:27,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735582255] [2022-11-22 02:38:27,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:27,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:38:27,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:38:27,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:38:27,114 INFO L87 Difference]: Start difference. First operand 215 states and 332 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:27,255 INFO L93 Difference]: Finished difference Result 251 states and 374 transitions. [2022-11-22 02:38:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:38:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 125 [2022-11-22 02:38:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:27,258 INFO L225 Difference]: With dead ends: 251 [2022-11-22 02:38:27,258 INFO L226 Difference]: Without dead ends: 239 [2022-11-22 02:38:27,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:38:27,259 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 53 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:27,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 249 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:38:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-22 02:38:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 216. [2022-11-22 02:38:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 202 states have (on average 1.5198019801980198) internal successors, (307), 205 states have internal predecessors, (307), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-22 02:38:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 333 transitions. [2022-11-22 02:38:27,316 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 333 transitions. Word has length 125 [2022-11-22 02:38:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:27,317 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 333 transitions. [2022-11-22 02:38:27,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:27,317 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 333 transitions. [2022-11-22 02:38:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 02:38:27,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:27,319 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:27,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (41)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:27,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:38:27,532 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:27,532 INFO L85 PathProgramCache]: Analyzing trace with hash 888006796, now seen corresponding path program 4 times [2022-11-22 02:38:27,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:27,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53484417] [2022-11-22 02:38:27,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:38:27,533 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 [2022-11-22 02:38:27,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:27,534 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:38:27,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (42)] Waiting until timeout for monitored process [2022-11-22 02:38:27,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:38:27,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:38:27,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-22 02:38:27,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:38:30,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:38:38,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:38,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53484417] [2022-11-22 02:38:38,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53484417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:38,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [906410130] [2022-11-22 02:38:38,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:38:38,272 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:38,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:38,279 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:38,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-22 02:38:38,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:38:38,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:38:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-22 02:38:38,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:38:39,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:38:41,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [906410130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:41,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340631513] [2022-11-22 02:38:41,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:38:41,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:41,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:38:41,237 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:38:41,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-22 02:38:41,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:38:41,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:38:41,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 02:38:41,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:38:47,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:38:55,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340631513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:55,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:38:55,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 122 [2022-11-22 02:38:55,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350147948] [2022-11-22 02:38:55,290 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:38:55,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-11-22 02:38:55,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:55,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-11-22 02:38:55,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2829, Invalid=11933, Unknown=0, NotChecked=0, Total=14762 [2022-11-22 02:38:55,295 INFO L87 Difference]: Start difference. First operand 216 states and 333 transitions. Second operand has 122 states, 122 states have (on average 2.9098360655737703) internal successors, (355), 119 states have internal predecessors, (355), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-22 02:43:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:16,331 INFO L93 Difference]: Finished difference Result 933 states and 1713 transitions. [2022-11-22 02:43:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 417 states. [2022-11-22 02:43:16,332 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.9098360655737703) internal successors, (355), 119 states have internal predecessors, (355), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 125 [2022-11-22 02:43:16,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:16,340 INFO L225 Difference]: With dead ends: 933 [2022-11-22 02:43:16,340 INFO L226 Difference]: Without dead ends: 915 [2022-11-22 02:43:16,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 500 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108495 ImplicationChecksByTransitivity, 229.2s TimeCoverageRelationStatistics Valid=52143, Invalid=199359, Unknown=0, NotChecked=0, Total=251502 [2022-11-22 02:43:16,372 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 8276 mSDsluCounter, 8155 mSDsCounter, 0 mSdLazyCounter, 21000 mSolverCounterSat, 1083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8276 SdHoareTripleChecker+Valid, 8323 SdHoareTripleChecker+Invalid, 22083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1083 IncrementalHoareTripleChecker+Valid, 21000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:16,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8276 Valid, 8323 Invalid, 22083 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1083 Valid, 21000 Invalid, 0 Unknown, 0 Unchecked, 48.7s Time] [2022-11-22 02:43:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-22 02:43:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 228. [2022-11-22 02:43:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 214 states have (on average 1.52803738317757) internal successors, (327), 216 states have internal predecessors, (327), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-22 02:43:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 353 transitions. [2022-11-22 02:43:16,572 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 353 transitions. Word has length 125 [2022-11-22 02:43:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:16,572 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 353 transitions. [2022-11-22 02:43:16,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.9098360655737703) internal successors, (355), 119 states have internal predecessors, (355), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-22 02:43:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 353 transitions. [2022-11-22 02:43:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-22 02:43:16,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:16,575 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:16,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:16,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-22 02:43:16,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (42)] Ended with exit code 0 [2022-11-22 02:43:17,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:43:17,178 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:17,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:17,178 INFO L85 PathProgramCache]: Analyzing trace with hash 989289301, now seen corresponding path program 1 times [2022-11-22 02:43:17,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:43:17,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938173579] [2022-11-22 02:43:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:17,179 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 [2022-11-22 02:43:17,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:43:17,180 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:43:17,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (45)] Waiting until timeout for monitored process [2022-11-22 02:43:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:17,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:43:17,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2022-11-22 02:43:17,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:43:17,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:43:17,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938173579] [2022-11-22 02:43:17,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938173579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:17,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:17,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:43:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700511109] [2022-11-22 02:43:17,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:17,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:43:17,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:43:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:43:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:43:17,339 INFO L87 Difference]: Start difference. First operand 228 states and 353 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:43:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:17,438 INFO L93 Difference]: Finished difference Result 243 states and 368 transitions. [2022-11-22 02:43:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:43:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 126 [2022-11-22 02:43:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:17,441 INFO L225 Difference]: With dead ends: 243 [2022-11-22 02:43:17,441 INFO L226 Difference]: Without dead ends: 238 [2022-11-22 02:43:17,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:43:17,443 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:17,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 234 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:43:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-22 02:43:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2022-11-22 02:43:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 221 states have (on average 1.51131221719457) internal successors, (334), 223 states have internal predecessors, (334), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-22 02:43:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 360 transitions. [2022-11-22 02:43:17,534 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 360 transitions. Word has length 126 [2022-11-22 02:43:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:17,534 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 360 transitions. [2022-11-22 02:43:17,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:43:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 360 transitions. [2022-11-22 02:43:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-22 02:43:17,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:17,536 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:17,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (45)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:17,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:43:17,749 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:17,749 INFO L85 PathProgramCache]: Analyzing trace with hash -531623995, now seen corresponding path program 1 times [2022-11-22 02:43:17,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:43:17,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732999175] [2022-11-22 02:43:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:17,750 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 [2022-11-22 02:43:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:43:17,751 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:43:17,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:43:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:17,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-22 02:43:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:43:21,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:22,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:43:22,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732999175] [2022-11-22 02:43:22,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732999175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:22,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1859167569] [2022-11-22 02:43:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:22,364 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:43:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:43:22,365 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:43:22,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-22 02:43:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-22 02:43:22,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:43:23,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:25,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1859167569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:25,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737675270] [2022-11-22 02:43:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:25,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:25,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:25,995 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:25,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-22 02:43:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:26,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 02:43:26,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:43:34,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:34,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737675270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:34,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:43:34,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 72 [2022-11-22 02:43:34,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393282081] [2022-11-22 02:43:34,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:34,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-22 02:43:34,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:43:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-22 02:43:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=6504, Unknown=0, NotChecked=0, Total=6806 [2022-11-22 02:43:34,901 INFO L87 Difference]: Start difference. First operand 235 states and 360 transitions. Second operand has 72 states, 72 states have (on average 2.8055555555555554) internal successors, (202), 70 states have internal predecessors, (202), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 02:43:57,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:43:59,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:44:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:17,123 INFO L93 Difference]: Finished difference Result 521 states and 799 transitions. [2022-11-22 02:44:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-22 02:44:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.8055555555555554) internal successors, (202), 70 states have internal predecessors, (202), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 127 [2022-11-22 02:44:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:17,127 INFO L225 Difference]: With dead ends: 521 [2022-11-22 02:44:17,127 INFO L226 Difference]: Without dead ends: 506 [2022-11-22 02:44:17,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 348 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=397, Invalid=7793, Unknown=0, NotChecked=0, Total=8190 [2022-11-22 02:44:17,129 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 383 mSDsluCounter, 9839 mSDsCounter, 0 mSdLazyCounter, 15960 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 10034 SdHoareTripleChecker+Invalid, 15963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15960 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:17,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 10034 Invalid, 15963 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2 Valid, 15960 Invalid, 1 Unknown, 0 Unchecked, 39.1s Time] [2022-11-22 02:44:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-22 02:44:17,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 248. [2022-11-22 02:44:17,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 231 states have (on average 1.4978354978354977) internal successors, (346), 233 states have internal predecessors, (346), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-22 02:44:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 387 transitions. [2022-11-22 02:44:17,245 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 387 transitions. Word has length 127 [2022-11-22 02:44:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:17,246 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 387 transitions. [2022-11-22 02:44:17,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.8055555555555554) internal successors, (202), 70 states have internal predecessors, (202), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 02:44:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 387 transitions. [2022-11-22 02:44:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-22 02:44:17,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:17,248 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:17,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:17,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:17,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:17,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:44:17,866 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:17,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:17,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1954234437, now seen corresponding path program 2 times [2022-11-22 02:44:17,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:44:17,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790685556] [2022-11-22 02:44:17,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:44:17,867 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 [2022-11-22 02:44:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:44:17,868 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:44:17,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:44:17,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:44:17,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:44:17,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-22 02:44:17,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:44:21,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:23,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:44:23,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790685556] [2022-11-22 02:44:23,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790685556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:44:23,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819914082] [2022-11-22 02:44:23,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:44:23,062 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:44:23,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:44:23,067 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:44:23,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-22 02:44:23,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:44:23,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:44:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-22 02:44:23,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:44:24,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:24,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1819914082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:44:24,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997207413] [2022-11-22 02:44:24,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:44:24,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:24,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:24,682 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:24,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-22 02:44:24,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:44:24,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:44:24,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-22 02:44:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:44:32,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:33,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997207413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:44:33,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:44:33,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 69 [2022-11-22 02:44:33,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142928794] [2022-11-22 02:44:33,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:44:33,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-22 02:44:33,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:44:33,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-22 02:44:33,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5183, Unknown=0, NotChecked=0, Total=5402 [2022-11-22 02:44:33,014 INFO L87 Difference]: Start difference. First operand 248 states and 387 transitions. Second operand has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 02:45:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:05,844 INFO L93 Difference]: Finished difference Result 502 states and 777 transitions. [2022-11-22 02:45:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-22 02:45:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 128 [2022-11-22 02:45:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:05,848 INFO L225 Difference]: With dead ends: 502 [2022-11-22 02:45:05,849 INFO L226 Difference]: Without dead ends: 488 [2022-11-22 02:45:05,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 362 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=269, Invalid=6051, Unknown=0, NotChecked=0, Total=6320 [2022-11-22 02:45:05,851 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 365 mSDsluCounter, 8546 mSDsCounter, 0 mSdLazyCounter, 13502 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 8741 SdHoareTripleChecker+Invalid, 13503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:05,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 8741 Invalid, 13503 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 13502 Invalid, 0 Unknown, 0 Unchecked, 30.4s Time] [2022-11-22 02:45:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-22 02:45:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 250. [2022-11-22 02:45:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 233 states have (on average 1.4935622317596566) internal successors, (348), 235 states have internal predecessors, (348), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-22 02:45:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 389 transitions. [2022-11-22 02:45:05,968 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 389 transitions. Word has length 128 [2022-11-22 02:45:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:05,968 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 389 transitions. [2022-11-22 02:45:05,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 02:45:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 389 transitions. [2022-11-22 02:45:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-22 02:45:05,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:05,971 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:45:05,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-22 02:45:06,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-22 02:45:06,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:45:06,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:45:06,581 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:45:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1319664505, now seen corresponding path program 1 times [2022-11-22 02:45:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:45:06,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26949200] [2022-11-22 02:45:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:06,581 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 [2022-11-22 02:45:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:45:06,582 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:45:06,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (52)] Waiting until timeout for monitored process [2022-11-22 02:45:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-22 02:45:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:45:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:45:10,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:45:12,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:45:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26949200] [2022-11-22 02:45:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26949200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:45:12,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [297625883] [2022-11-22 02:45:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:12,874 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:45:12,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:45:12,875 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:45:12,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-22 02:45:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-22 02:45:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:45:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:45:14,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:45:14,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [297625883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:45:14,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602903104] [2022-11-22 02:45:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:14,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:14,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:45:14,650 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:45:14,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-22 02:45:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-22 02:45:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:45:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 02:45:22,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:45:23,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602903104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:45:23,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:45:23,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 69 [2022-11-22 02:45:23,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186390270] [2022-11-22 02:45:23,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:45:23,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-22 02:45:23,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:45:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-22 02:45:23,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5319, Unknown=0, NotChecked=0, Total=5550 [2022-11-22 02:45:23,445 INFO L87 Difference]: Start difference. First operand 250 states and 389 transitions. Second operand has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 02:46:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:02,429 INFO L93 Difference]: Finished difference Result 502 states and 776 transitions. [2022-11-22 02:46:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-22 02:46:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 128 [2022-11-22 02:46:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:02,433 INFO L225 Difference]: With dead ends: 502 [2022-11-22 02:46:02,434 INFO L226 Difference]: Without dead ends: 488 [2022-11-22 02:46:02,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=286, Invalid=6194, Unknown=0, NotChecked=0, Total=6480 [2022-11-22 02:46:02,436 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 377 mSDsluCounter, 9758 mSDsCounter, 0 mSdLazyCounter, 15319 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 9951 SdHoareTripleChecker+Invalid, 15320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:02,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 9951 Invalid, 15320 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 15319 Invalid, 0 Unknown, 0 Unchecked, 36.5s Time] [2022-11-22 02:46:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-22 02:46:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 248. [2022-11-22 02:46:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 231 states have (on average 1.4935064935064934) internal successors, (345), 233 states have internal predecessors, (345), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-22 02:46:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 386 transitions. [2022-11-22 02:46:02,559 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 386 transitions. Word has length 128 [2022-11-22 02:46:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:02,559 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 386 transitions. [2022-11-22 02:46:02,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 02:46:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 386 transitions. [2022-11-22 02:46:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-22 02:46:02,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:02,562 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:02,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-22 02:46:02,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (52)] Forceful destruction successful, exit code 0 [2022-11-22 02:46:02,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-22 02:46:03,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:46:03,165 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash 602401121, now seen corresponding path program 1 times [2022-11-22 02:46:03,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:46:03,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109198526] [2022-11-22 02:46:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:03,167 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 [2022-11-22 02:46:03,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:46:03,168 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:46:03,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef8d8c87-92ff-4740-b3bb-8069344851e9/bin/utaipan-g80aRyZoba/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 (55)] Waiting until timeout for monitored process [2022-11-22 02:46:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:03,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-22 02:46:03,290 INFO L286 TraceCheckSpWp]: Computing forward predicates...